Patents Issued in April 12, 2007
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Publication number: 20070081567Abstract: A modulation driver for delivering an output modulation current for driving an optical source of an optical transmitter, the output modulation current comprises a first modulation current region characterised with a first temperature gradient and a second modulation current region characterised with a second temperature gradient, said first modulation current region and said second modulation region being for delivering modulation current at a first temperature range and a second temperature range, temperatures of said second temperature being higher than temperatures of said first temperature range, said second temperature gradient being larger than said first temperature gradient.Type: ApplicationFiled: October 11, 2005Publication date: April 12, 2007Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventors: Kut Lam, Yu Choi, Torsten Wipiejewski
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Publication number: 20070081568Abstract: An optical semiconductor element includes a surface-emitting type semiconductor laser with a multilayered structure that emits laser light in a direction vertical to a substrate surface, a photodetecting element with a multilayered structure formed above or below the surface-emitting type semiconductor laser, and an electrostatic breakdown protection element that protects the surface-emitting type semiconductor laser from electrostatic destruction, which are provided on the substrate, wherein a pair of input terminals for driving the surface-emitting type semiconductor laser and a pair of output terminals of the photodetecting element are provided independently of one another.Type: ApplicationFiled: September 27, 2006Publication date: April 12, 2007Applicant: SEIKO EPSON CORPORATIONInventor: Yasutaka Imai
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Publication number: 20070081569Abstract: A three-dimensional (3D) photonic quantum ring (PQR) laser for a low power consumption display, wherein the PQR laser has a sufficient small radius to adjust an inter-mode spacing (IMS) of oscillation modes discretely multi-wavelength-oscillating in an envelope wavelength range within the gain profile of a given semiconductor material of the PQR laser so that the IMS has a maximal value and the number of the oscillation modes is minimized. The PQR laser exhibits multi-wavelength oscillation characteristics according to a 3D toroidal cavity structure, and is designed to exhibit a threshold current lower than those of LEDs and to have multi-wavelength modes in an envelope wavelength range of several nm to several tens of nm. The PQR laser consumes reduced power while maintaining desired color and high brightness equal to those of the LEDs, through an adjustment of the multi-wavelength oscillation characteristics and IMS of the PQR laser.Type: ApplicationFiled: March 23, 2005Publication date: April 12, 2007Applicant: POSTECH FOUNDATIONInventors: O'Dae Kwon, Joongwoo Bae, Sung-Jae An, Dongkwon Kim
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Publication number: 20070081570Abstract: Provided is a side light emitting type semiconductor laser diode in which a dielectric layer is formed on an active layer. The side light emitting type semiconductor laser diode includes an n-clad layer, an n-light guide layer, an active layer and a p-light guide layer sequentially formed on a substrate, and a dielectric layer with a ridge structure formed on the p-light guide layer.Type: ApplicationFiled: October 11, 2006Publication date: April 12, 2007Applicant: Samsung Electronics Co., Ltd.Inventors: Han-youl Ryu, Kyoung-ho Ha
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Publication number: 20070081571Abstract: A radiation-emitting semiconductor chip (1) comprising a thin-film semiconductor body (2) which has a semiconductor layer sequence with an active region (4) suitable for generating radiation, and a reflector layer (5) arranged on the thin-film semiconductor body. The semiconductor chip has a Bragg reflector in addition to the reflector layer, and the Bragg reflector (6) and the reflector layer are arranged on the same side of the active region.Type: ApplicationFiled: September 26, 2006Publication date: April 12, 2007Applicant: Osram Opto Semiconductors GmbHInventor: Ralph Wirth
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Publication number: 20070081572Abstract: A molten material can be heated, melted and directly solidified in a single vessel. Induction heating and melting of the molten material is achieved by magnetically coupling the field produced by current flow in a plurality of induction coils surrounding the vessel with either the molten material in the vessel, or a susceptor surrounding molten material in the vessel. Current flow is selectively removed from the plurality of induction coils, and a cooling medium surrounding the vessel, such as water flowing through hollow induction coils, solidifies the molten metal into a highly purified crystalline solid.Type: ApplicationFiled: April 14, 2004Publication date: April 12, 2007Inventors: Oleg Fishman, Joseph Belsh, Bernard Raffner, Prabhu Satyen
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Publication number: 20070081573Abstract: This invention relates to a process for inhibiting the formation of biofilm and/or removing biofilm deposited on an enhanced tube of a heat exchanger in contact with an aqueous system. The process comprises feeding an oxidant selected from the group consisting of chlorine dioxide and stabilized bromine into an aqueous system such that the oxidant agent comes into contact with the enhanced tube.Type: ApplicationFiled: March 31, 2006Publication date: April 12, 2007Applicant: Ashland Licensing and Intellectual Property LLCInventors: Edward Beardwood, George Hays, Steven Colby, Dwight Emerich
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Publication number: 20070081574Abstract: Temperature sensor device that allows changes of temperature (14) to be detected, as the materials that form said device (1) are deformed, that consists of a body formed by two valves (2) and a structure (8) provided in the hollow interior (7), so that they join together with the aid of a number of bolts (5), it having been envisaged that in one of the bolts (5) and in the structure (8) electrical terminals (4) are positioned, separated a distance (12) from each other, so that when an increase in temperature (14) takes place, it causes the deformation of the components of the device (1), allowing contact of the electrical terminals on having reached the critical temperature (14), and producing the activation of a warning device (13) with the aid of a conductive medium (10)Type: ApplicationFiled: October 28, 2003Publication date: April 12, 2007Inventor: Hiroshi Kawanaka
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Publication number: 20070081575Abstract: A method and apparatus for temperature sensing in an IC. The IC includes a plurality of remote temperature sensors each coupled to a control logic unit. The plurality of remote temperature sensors may be distributed throughout the integrated circuit. The integrated circuit includes a reference unit coupled to provide a reference temperature to the control logic unit and a reference sensor coupled to provide a signal having a reference frequency to the control logic unit. The reference unit and the reference sensor are located near each other. The control logic unit is configured to correlate the reference frequency received from the reference sensor with the reference temperature received from the reference unit. The control logic unit is further configured to determine the temperature of each of the remote temperature sensors based on this correlation, and also configured to determine the maximum temperature of all of the temperature sensors.Type: ApplicationFiled: October 7, 2005Publication date: April 12, 2007Inventors: Huining Liu, Larry Hewitt
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Publication number: 20070081576Abstract: Ultrasound transducer temperatures are measured in response to a temperature dependent property of the ultrasound transducer. The temperature is measured without addition of new electronics or hardware retrofits of the transducer. By implementing software and/or hardware on the ultrasound system rather than the transducer, the temperature is measured in order to provide a level of fault protection. The upgraded or new ultrasound system uses either old or new transducers while still providing temperature measurement. For example, the temperature of the lens or window is measured as a function of changes in attenuation or acoustic velocity. The receive beamformer already implemented on many ultrasound systems is used to measure a temperature dependent property of the lens or window. As another example, the dielectric constant or capacitance of one or more transducer elements is measured using additional hardware in the ultrasound system.Type: ApplicationFiled: December 4, 2006Publication date: April 12, 2007Inventors: Bhaskar Ramamurthy, John Marshall, Jan-Ulco Kluiwstra
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Publication number: 20070081577Abstract: The invention relates to a method for broadband communication. The method includes transmitting a sequence of pulses or impulses at a pulse repetition frequency from a first communication device to another device via a wireless link. The method further includes adjusting the pulse repetition frequency based on channel delay spread measurements performed by said another device.Type: ApplicationFiled: November 12, 2004Publication date: April 12, 2007Inventors: Jukka Reunamaki, Arto Palin
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Publication number: 20070081578Abstract: Nyquist folded bandpass sampling receivers are disclosed that utilize narrow band filters in parallel with wideband filters to enhance reception of ultra wideband (UWB) pulses. The addition of the narrow band filter facilitates the reception of ultra wideband signal pulses and, therefore, extends the Nyquist folding bandpass sampling receiver to allow improved processing of ultra wideband (UWB) pulses. RF sampling circuitry utilizing a modulated sampling clock signal can then better capture UWB pulse signals.Type: ApplicationFiled: October 10, 2006Publication date: April 12, 2007Inventors: Gerald Fudge, James Harvey, Mark Chivers, Sujit Ravindran
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Publication number: 20070081579Abstract: A code-tracking system includes a loop filter, which receives an early/late error signal and outputs a loop filter error signal. An error scaling device receives the loop filter error representing an update and provides a code tracking adjustment signal. A controller monitors a frequency of updates and/or a number of same direction updates and provides a filter coefficient in accordance with the frequency of updates and/or the number of same direction updates.Type: ApplicationFiled: November 4, 2003Publication date: April 12, 2007Inventors: Zoran Kostic, Louis Litwin
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Publication number: 20070081580Abstract: In an apparatus for generating a transmit sequence comprising information from a plurality of information channels, a first means serves for generating a plurality of different candidate channel sequences from information of a first information channel of the plurality of information channels using a first code sequence associated with the first information channel, wherein each candidate channel sequence carries the same information as the information of the first information channel. A second means is provided to provide at least one candidate channel sequence for a second information channel from the plurality of information channels using a second code sequence associated with the second information channel and differing from the first code sequence. To receive an optimum transmit sequence resulting in a minimum out-of-band radiation combined sequences are examined, wherein each combined sequence may be obtained by a combination of at least one candidate channel sequence from each information channel.Type: ApplicationFiled: August 11, 2006Publication date: April 12, 2007Inventor: Marco Breiling
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Publication number: 20070081581Abstract: A positioning apparatus for positioning based on satellite signals from positioning satellites includes: correlation information generating means for generating correlation information which indicates correlation values between the satellite signals and correlation purpose signals stored in the positioning apparatus; correlation information evaluating means for determining whether or not variation in the correlation values falls within a predetermined normal variation range; multipath determining means for determining whether or not the satellite signals are affected by a multipath based on determination results of the correlation information evaluating means; multipath correcting information generating means for generating multipath correcting information to correct effects of the multipath based on determination results of the multipath determining means and the correlation information; and correlation value correcting means for correcting the correlation values based on the multipath correcting informationType: ApplicationFiled: October 6, 2006Publication date: April 12, 2007Applicant: Seiko Epson CorporationInventor: Naoki Gobara
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Publication number: 20070081582Abstract: Control of a digital communication system having a plurality of communication lines on which signals are transmitted and received is implemented using a variety of methods and systems. According to one embodiment of the present invention, a method is implemented where the signals are affected by interference during transmission and each of the communication lines has at least one transmitter and at least one receiver. A model is created of the interference characteristics due to the signals carried on the communication lines. Interference characteristics for a line are determined based on the model and actual signals carried on other communication lines different from the line for which the characteristics are being determined. Actual interference is compensated for on the communication line using the determined interference characteristics.Type: ApplicationFiled: December 8, 2006Publication date: April 12, 2007Inventors: Georgios Ginis, Wei Yu, Chaohuang Zeng, John Cioffi
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Publication number: 20070081583Abstract: A method of monitoring the condition of a machine is provided. The method includes receiving an input complex signal from the machine wherein the input complex signal has a plurality of signal components. The plurality of signal components includes at least one signal component containing a pre-determined frequency of interest and at least one signal component containing noise. The method further includes processing the input complex signal and generating an output complex signal having a plurality of signal components The plurality of signal components includes at least one signal component containing a pre-determined frequency of interest and at least one signal component containing noise. Processing the input complex signal includes executing a fixed-step integration and processing the output complex signal to assess whether a fault exists.Type: ApplicationFiled: October 10, 2005Publication date: April 12, 2007Inventors: Alexei Petchenev, Olga Malakhova, John Grant, Nathan Littrell, Charles Hatch
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Publication number: 20070081584Abstract: The present invention relates to a filter apparatus and method having a fixed aspect for providing a predetermined selectivity and having an adaptive aspect for determining the frequency response of said filter apparatus. The adaptive aspect is controlled to change the frequency response. Predetermined zero values of the filter characteristic are set to provide a predetermined filter selectivity; and at least one filter parameter is controlled to change pole values of the filter characteristic so as to provide frequency response adaptation. Thereby, the frequency response of the filter operation can change while the filter selectivity can be maintained. The filter apparatus is thus able to cope with advanced system requirements while keeping the complexity and power consumption low.Type: ApplicationFiled: September 14, 2004Publication date: April 12, 2007Applicant: Koninklijke Philips Electronics N.V.Inventor: Pierluigi Alessandro
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Publication number: 20070081585Abstract: When transmitting an RF signal for power supply or a pulse signal for data transmission, amplification is made in such a manner that the peak power of the RF signal becomes greater than the peak power of the pulse signal. Thus transmitting the RF signal with the greater peak power enables charging of a capacitor 23 of noncontact wireless communication equipment 2 even if the distance to the noncontact wireless communication equipment 2 is long.Type: ApplicationFiled: July 30, 2004Publication date: April 12, 2007Inventors: Noriharu Suematsu, Kouji Tsutsumi, Yasushi Sogabe, Toshihisa Kamemaru, Yoshihiko Konishi, Masataka Otsuka, Ryoji Hayashi, Akinori Taira
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Publication number: 20070081586Abstract: Apparatus and methods of using content information for encoding multimedia data are described. A method of processing multimedia data includes classifying content of multimedia data, and encoding the multimedia data in a first data group and in a second data group based on the content classification, wherein the first data group comprises a coefficient and the second data group comprises a first differential refinement associated with the first data group coefficient. An apparatus for using content information for encoding multimedia data includes a content classifying module configured to classify content of multimedia data and provide content classification data, and an encoder configured to encode the multimedia data in a first data group and in a second data group based on the content classification, wherein the first data group comprises a coefficient and the second data group comprises a first differential refinement associated with the first data group coefficient.Type: ApplicationFiled: September 26, 2006Publication date: April 12, 2007Inventors: Vijayalakshmi Raveendran, Gordon Walker, Tao Tian, Phanikumar Bhamidipati, Fang Shi, Peisong Chen, Sitaraman Subramania, Seyfullah Oguz
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Publication number: 20070081587Abstract: Apparatus and methods of using content information for encoding multimedia data are described. A method of processing multimedia data includes receiving multimedia data, and encoding the multimedia data into a first data group and a second data group based on content of the multimedia data, the first data group being configured to be independently decodable from the second data group, and wherein the first and second data groups are encoded at different quality levels. The method can also include classifying the content of the multimedia data and encoding the multimedia data based on the content classification.Type: ApplicationFiled: September 26, 2006Publication date: April 12, 2007Inventors: Vijayalakshmi Raveendran, Gordon Walker, Tao Tian, Phanikumar Bhamidipati, Fang Shi, Peisong Chen, Sitaraman Subramania, Seyfullah Oguz
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Publication number: 20070081588Abstract: Apparatus and methods of using content information for encoding multimedia data are described. A method of processing multimedia data includes A method of processing multimedia data, including obtaining content information of multimedia data, and encoding the multimedia data to form an encoded bitstream, said encoding comprising inserting at least one redundant block of intra-coded data into the encoded bitstream based on the content information. In some aspects, the encoding comprises encoding the multimedia data into a base layer and an enhancement layer, and wherein the intra-coded data is encoded using the quantization parameter for the base layer. In other aspects, the intra-coded data is encoded using the quantization parameter for the enhancement layer.Type: ApplicationFiled: September 26, 2006Publication date: April 12, 2007Inventors: Vijayalakshmi Raveendran, Gordon Walker, Tao Tian, Phanikumar Bhamidipati, Fang Shi, Peisong Chen, Sitaraman Subramania, Seyfullah Oguz
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Publication number: 20070081589Abstract: An adaptive quantization controller and methods thereof are provided. In an example method, motion prediction may be performed on at least one frame included in an input frame based on a reference frame. A prediction error may be generated as a difference value between the input frame and the reference frame. An activity value may be computed based on a received macroblock, the received macroblock associated with one of the input frame and the prediction error. A quantization parameter may be generated by multiplying a reference quantization parameter by a normalization value of the computed activity value. In another example method, an input frame including an I frame may be received and motion prediction for the I frame may be performed based at least in part on information extracted from one or more previous input frames. In a further example, the adaptive quantization controller may perform the above-described example methods.Type: ApplicationFiled: August 17, 2006Publication date: April 12, 2007Inventors: Jong-sun Kim, Jae-young Beom, Kyoung-mook Lim, Jea-hong Park, Seung-hong Jeon
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Publication number: 20070081590Abstract: A macro-block (MB) quantization reactivity compensation method for a video encoder is provided. The method calculates a reference picture quantization value based on a calculated picture complexity. This predicted reference quantization is combined with the bits-used reactive MB reference quantization value to determine the final MB reference quantization value. This MB reference quantization value is also made adaptive to the VBV buffer fullness, as well as to the predicted change of the current picture complexity. A video encoder and an article of manufacture that comprises computer readable program code for execution of the method are also provided.Type: ApplicationFiled: September 21, 2006Publication date: April 12, 2007Applicant: STMicroelectronics Asia Pacific PTE LtdInventors: Kwong-Huang Goh, Lucas Hui
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Publication number: 20070081591Abstract: A method and apparatus are provided for coding a moving picture frame to reduce flickering. The method includes generating an inter-reconstructed image by performing interprediction on a moving picture frame to be coded, generating an intra-reconstructed image by performing intraprediction on the moving picture frame, generating a first difference image between the inter-reconstructed image and the intra-reconstructed image, and generating a second difference image by adding the first difference image and an intra difference image generated during the intraprediction.Type: ApplicationFiled: August 7, 2006Publication date: April 12, 2007Inventor: Tae-gyoung Ahn
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Publication number: 20070081592Abstract: Additional data compression is achieved by enhancing the spatial and temporal correlation of the data in a pre-processing module prior to sending the data to an encoding algorithm, such as for example, the MPEG algorithm. An input frame of data is decomposed into a luminance frame and two chrominance frames. The luminance frame is transformed on the basis of each of a plurality of luminance pixels within the frame to produce a transformed luminance frame having a plurality of transformed luminance pixels. A map describing a relationship between the plurality of luminance pixels of the luminance frame and the plurality of transformed luminance pixels of the transformed luminance frame is created. The two chrominance frames are transformed according to the map to produce two transformed chrominance frames. The transformed luminance frame and the two transformed chrominance frames are integrated to produce a transformed output frame.Type: ApplicationFiled: October 6, 2005Publication date: April 12, 2007Inventor: Priyan Gunatilake
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Publication number: 20070081593Abstract: Provided is an inter-frame wavelet coding apparatus that can reduce the computation complexity of a decoder by adjusting a decomposition level and a filter length based on the information amount of a frame during wavelet transform and a method therefor.Type: ApplicationFiled: May 13, 2004Publication date: April 12, 2007Inventors: Se-Yoon Jeong, Kyu-Heon Kim, Wonha Kim, Jin-Woong Kim
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Publication number: 20070081594Abstract: By generating a transmission signal containing information on a video signal containing information on a video signal encoded in units of a video signal of a predetermined number of vertical periods and adding a flag indicating the header of the transmission signal to the header of the transmission signal, it is possible to extract the flag indicating the header of the transmission signal added to the header of the transmission signal which has been radio-received and decode the encoded video signal contained in the transmission signal at the timing in accordance with a reference signal outputted at the timing when the flag is extracted.Type: ApplicationFiled: October 28, 2004Publication date: April 12, 2007Applicant: Sayno Electric Co., LTDInventor: Tadashi Amino
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Publication number: 20070081595Abstract: A digital television (DTV) transmitter and a method of coding data in the DTV transmitter method are disclosed. A pre-processor pre-processes the enhanced data by coding the enhanced data for forward error correction (FEC) and expanding the FEC-coded enhanced data. A data formatter generates one or more groups of enhanced data packets, each enhanced data packet including the pre-processed enhanced data. And, a packet multiplexer generates at least one burst of enhanced data by multiplexing the one or more groups of enhanced data packets. Herein, each burst of enhanced data includes at least one group of enhanced data packets. The DTV transmitter may further include a scheduler which generates first and second control signals to control operations of the data formatter and the packet multiplexer, respectively.Type: ApplicationFiled: June 30, 2006Publication date: April 12, 2007Inventors: In Hwan Choi, Kyung Kang, Kook Kwak, Young Hong, Sung Hong
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Publication number: 20070081596Abstract: A video quality adaptive coding artifact reduction system has a video quality analyzer, an artifact reducer, and a filter strength controller. The video quality analyzer employs input video quality analysis to control artifact reduction. The video quality analyzer accesses the video quality of the decoded video sequence to estimate the input video quality. The filter strength controller globally controls the filter strength of the artifact reducer based on the video quality estimate by the video quality analyzer. For low quality input video, the filter strength controller increases the artifact reduction filter strength to more efficiently reduce the artifact. For high quality input video, the filter strength controller decreases the artifact reduction filter strength to avoid blurring image detail.Type: ApplicationFiled: October 6, 2005Publication date: April 12, 2007Applicant: Samsung Electronics, Co., Ltd.Inventors: Peng Lin, Yeong-Taeg Kim
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Publication number: 20070081597Abstract: A selected channel of a multi-channel signal which is represented by frames composed from sampling values having a high time resolution can be encoded with higher quality when a wave form parameter representation representing a wave form of an intermediate resolution representation of the selected channel is derived, the wave form parameter representation including a sequence of intermediate wave form parameters having a time resolution lower than the high time resolution of the sampling values and higher than a time resolution defined by a frame repetition rate. The wave form parameter representation with the intermediate resolution can be used to shape a reconstructed channel to retrieve a channel having a signal envelope close to that one of the selected original channel. The time scale on which the shaping is performed is shorter than the time scale of a framewise processing, thus enhancing the quality of the reconstructed channel.Type: ApplicationFiled: February 27, 2006Publication date: April 12, 2007Inventors: Sascha Disch, Juergen Herre, Matthias Neusinger, Dirk Jeroen Breebaart, Gerard Hotho
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Publication number: 20070081598Abstract: Methods and apparatus are disclosed for transitioning a receiver from a first state to a second state using an in-band signal over a differential serial data link.Type: ApplicationFiled: December 11, 2006Publication date: April 12, 2007Inventor: Zale Schoenborn
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Publication number: 20070081599Abstract: A method and apparatus of sampling reflected voltage signal of a transformer is proposed. Sampling signals are used for generating hold voltages by sequentially sampling the reflected voltage from the transformer. A buffer circuit generates a buffer signal from the higher voltage of hold voltages. A sampling switch periodically conducts the buffer signal to produce a feedback signal according to an output of the buffer circuit. The feedback signal is proportional to output voltage of the transformer. A threshold signal added by the reflected voltage signal produces a level-shift signal. A discharge-time signal is enabled once the switching signal is disabled. The discharge-time signal is disabled once the level-shift signal is lower than output of the buffer circuit. The pulse width of the discharge-time signal is correlated to the discharge time of the transformer. The sampling signals are enabled to generate hold voltages when discharge-time signal is enabled.Type: ApplicationFiled: October 7, 2005Publication date: April 12, 2007Inventor: Ta-yung Yang
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Publication number: 20070081600Abstract: The invention relates to electrical network communications engineering and can be used for automatic data acquisition from intrusion and fire-alarm sensors, electric meters, heat, water and gas consumption meters and from the fiscal memory of cash control monitors. Said invention makes it possible to substentially reduce the energy consumption by the slave nodes of a system and/or increase the range of action thereof. In order to encode each symbol of transmitted data, a random or pseudorandom set of differences of initial pairs of nearest harmonic pairs are used. Said difference sets of the initial phases are selected in such a way that the peak factor of an added signal is minimised. When a fire-alarm sensor is actuated, it is sufficient to transmit only one symbol to an alarm panel which, unambiguously identifies the location of the active sensor and as a rule is embodied in the form of a conventional number or address pre-allocated to said sensor.Type: ApplicationFiled: October 7, 2004Publication date: April 12, 2007Inventors: Yuri Sokolov, Valery Saharov
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Publication number: 20070081601Abstract: A method for determining a presence of a preamble for an orthogonal frequency division multiplexed (OFDM) complex valued sample stream may include capturing a portion of the OFDM complex valued stream and autoconvolving the portion of the OFDM complex valued sample stream to generate an autoconvolved portion. The method may further include determining a presence of a preamble in the OFDM complex valued sample stream if a peak is detected in the autoconvolved portion.Type: ApplicationFiled: October 11, 2005Publication date: April 12, 2007Inventor: James McCoy
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Publication number: 20070081602Abstract: In a combination of control signals on data signals and the data signals where the combination contains data signals to be assigned respectively to a plurality of streams, a control unit assigns a control signal contained in a leading combination and assigns a data signal, contained in the leading combination, to a position posterior to the assigned control signal. The control unit appends a known signal to at least one of the remaining combinations and then assigns sequentially the remaining combinations to a position posterior to the assigned data signal so as to generate packet signals.Type: ApplicationFiled: September 19, 2006Publication date: April 12, 2007Inventors: Yasuhiro Tanaka, Seigo Nakao
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Publication number: 20070081603Abstract: A frame configuration method and apparatus for sending data via an RS in a broadband wireless communication system are provided. In the reception mode, the RS monitors reception of data in an (n?1)th frame from an MS and reception of data in an nth frame from a BS. The RS classifies the data received from the MS and the data received from the BS as combinable data to be sent in combination or as non-combinable data to be sent separately, and stores the classified data distinguishably. When the RS transitions to a transmission mode, it determines whether to XOR-operate or mask the stored data. If the stored data can be masked, the RS XOR-operates the stored data and sends the masked data to the BS and the MS.Type: ApplicationFiled: September 27, 2006Publication date: April 12, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jae-Hyuk Jang, Eun-Taek Lim, Young-Bin Chang, Jung-Min Ro, Tae-Young Kim, Dong-Seek Park, Young-Kwon Cho, Joon-Young Choi
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Publication number: 20070081604Abstract: A wireless transmission device capable of communicating with a receiver according to a DFT-spread OFDM protocol. The wireless transmission device comprises a configurable spectral shaping filter block capable of performing spectral shaping of an outgoing signal. The wireless transmission device configures the configurable spectral shaping filter block to perform spectral shaping according to a peak-to-average power (PAPR) value associated with the outgoing signal. The multi-carrier protocol comprises one of orthogonal frequency division multiple access (OFDMA) and orthogonal frequency division multiplexing (OFDM).Type: ApplicationFiled: September 7, 2006Publication date: April 12, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Farooq Khan, Joonyoung Cho, Juho Lee
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Publication number: 20070081605Abstract: A digital television (DTV) transmitter and a method of coding data in the DTV transmitter are disclosed. A data formatter generates an enhanced data packet including the enhanced data and a known data sequence. A data randomizer randomizes the enhanced data packet. A RS encoder RS-codes the randomized data packet by adding first parity data, and a data interleaver interleaves the RS-coded data packet. A trellis encoding unit trellis-encodes the interleaved data packet. Herein the trellis encoding unit includes a TCM encoder for generating a first output bit by trellis-encoding a first input bit and generating a second output bit by bypassing the first input bit, and a pre-coder for generating a third output bit by pre-coding a second input bit, wherein memories included in the TCM encoder and the pre-coder are initialized when the known data sequence is inputted to the trellis encoding unit.Type: ApplicationFiled: June 30, 2006Publication date: April 12, 2007Inventor: In Hwan Choi
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Publication number: 20070081606Abstract: Radio stations (10, 20) include a variety of propagation models. A radio signal is transmitted from a first to a second radio station, and the received signal is fitted to a plurality of models. Alternatively, the correlation of the received signals is fitted to models. The received signals are processed based on the best fit model, and the corresponding propagation effects. In some cases, the model can be used to correct for propagation effects. In other cases, other techniques such as beam steering can be used.Type: ApplicationFiled: February 27, 2004Publication date: April 12, 2007Inventor: Josi Rosenfeld
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Publication number: 20070081607Abstract: Modifying a signal according to a diversity parameter adjustment includes accessing scan parameter values, where a scan parameter describes a scan process. The scan parameter values include diversity parameter vectors, where a diversity parameter vector has a diversity parameter value for each of one or more diversity parameters. The scan process is performed by repeating the following for each diversity parameter vector: modifying a signal according to the diversity parameter values of the diversity parameter vector, where the signal is transmitted from a modifying communication device to a feedback communication device; and receiving a feedback signal reflecting feedback information describing the signal as received by the feedback communication device.Type: ApplicationFiled: October 10, 2005Publication date: April 12, 2007Inventors: Kenneth Kludt, Yair Karmi, Wei Sun, Haim Harel
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Publication number: 20070081608Abstract: The present invention relates to a method for increasing accuracy for estimating a multiple input multiple output (MIMO) channel. In the method, a maximum delay spread of a channel is estimated by using a Gold code or a Kasami code, a loosely-synchronous (LS) code having an appropriate interference free window (IFW) is selected, and the MIMO channel without any interference is accurately estimated.Type: ApplicationFiled: September 7, 2006Publication date: April 12, 2007Inventors: Hong-Sup Lee, Hyun-Kyu Chung, Kwang-Chun Lee
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Publication number: 20070081609Abstract: The present invention reduces adjacent channel interference for a wireless peripheral device. A direct digital synthesizer generates a waveform having intermediate angular changes during a transition time between symbol intervals. After the transition time, the direct digital synthesizer generates the waveform with an angular value that corresponds to the symbol being transmitted. In an exemplary embodiment, a generated waveform is characterized by one of two designated frequencies in response to a value of an input information bit. The waveform is further characterized by at least one intermediate frequency during a transition time between a change of the designated frequency. Another embodiment of the invention utilizes phase changes rather than frequency changes during reduce adjacent channel interference. With another aspect of the invention, methods are provided to determine waveform parameters for reducing adjacent channel power (ACP) to a maximum level of interference.Type: ApplicationFiled: December 11, 2006Publication date: April 12, 2007Applicant: Microsoft CorporationInventor: Mihai Albulet
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Publication number: 20070081610Abstract: A single sideband mixer circuit includes a voltage controlled oscillator operable a tunable frequency f1. The mixer circuit outputs a frequency signal at a frequency f1±f2. A tracking filter operates to filter the frequency signal and generate a first output signal at the frequency f1±f2. A resonance frequency fr of the tracking filter is tunable to substantially match the frequency f1±f2 of the frequency signal. The output signal of the tracking filter may be processed by a phase lock loop circuit to generate a control signal for controlling the setting of the tunable frequency f1 and resonance frequency fr. Alternatively, the output signal of the tracking filter may be divided and the divided signal processed by a phase lock loop circuit to generate the control signal for controlling setting of the tunable frequency f1 and resonance frequency fr.Type: ApplicationFiled: October 11, 2005Publication date: April 12, 2007Inventors: Ivan Krivokapic, Thierry Divel
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Publication number: 20070081611Abstract: A swept bandpass filter for receiving frequency varying input signals is disclosed. More particularly, a swept bandpass filter frequency modulated continuous wave (FMCW) receiver and related method are disclosed that provide an efficient solution for FMCW signals. The swept bandpass architecture eliminates the need for front-end mixing circuitry and allows for sampling across one or more Nyquist zones within the swept frequency band.Type: ApplicationFiled: October 11, 2005Publication date: April 12, 2007Inventors: Gerald Fudge, Boyd Gallatin
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Publication number: 20070081612Abstract: A system for implementing Incremental Redundancy (IR) operations in a wireless receiver includes a baseband processor, an equalizer, a system processor, and an IR processing module. The baseband processor receives an analog signal corresponding to a data block and samples the analog signal to produce samples. The equalizer receives the samples from the baseband processor, equalizes the samples, and produces soft decision bits corresponding to the data block. The equalizer may be implemented as a distinct processing component or may be performed by the baseband processor or system processor. The system processor receives at least the soft decision bits and initiates IR operations. The IR processing module receives the soft decision bits of the data block and performs IR operations on the data block in an attempt to correctly decode a corresponding data block.Type: ApplicationFiled: December 8, 2006Publication date: April 12, 2007Applicant: Broadcom Corporation, a California CorporationInventors: Li Chang, Nelson Sollenberger, Yongqian Wang, Aki Shohara, Yue Chen
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Publication number: 20070081613Abstract: An ultra wideband network transmitter and receiver, and a method capable of switching to a high-speed mode or a low-speed mode are provided. The transmitter includes a multi-band orthogonal frequency division multiplexing (MB-OFDM) modem; a direct sequence code division multiple access (DS-CDMA) modem; a mode switch which switches to the MB-OFDM modem or the DS-CDMA modem according to a mode control signal; a phase lock loop (PLL) which locks a frequency used for MB-OFDM type modulation or the DS-CDMA type modulation; and a central processing unit (CPU) controls the PLL and mode switch. The receiver includes an MB-OFDM modem; an DS-CDMA modem; an automatic gain controller; an analog-to-digital converter; an PLL; a mode switch; and an CPU. The method includes receiving a command to transmit data; and switching to an MB-OFDM modem to select to a high-speed operation mode.Type: ApplicationFiled: July 21, 2006Publication date: April 12, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Wan-jin Kim, Jae-hyun Koo
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Publication number: 20070081614Abstract: An apparatus and method for adaptively correcting I/Q imbalance, which is used in a receiver for correcting a received I/Q imbalanced signal to thus eliminate the I/Q imbalance. First, an interference amount caused by interference from an imbalanced in-phase signal to an imbalanced quadrature-phase signal is computed and accordingly subtracted from the quadrature-phase signal, so that a corrected quadrature-phase signal without phase imbalance is obtained. Next, a power of output in-phase signal, a power of output quadrature-phase signal, and a target are compared to thus determine an in-phase scaling factor and a quadrature-phase scaling factor. Finally, the imbalanced in-phase signal is multiplied by the in-phase scaling factor to thus obtain the output in-phase signal, and the corrected quadrature-phase signal is multiplied by the quadrature-phase scaling factor to thus obtain the output quadrature-phase signal.Type: ApplicationFiled: February 27, 2006Publication date: April 12, 2007Applicant: Sunplus Technology Co., Ltd.Inventor: Chi-Hsi Su
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Publication number: 20070081615Abstract: In one embodiment, the present invention includes a method for digitally detecting a first signal strength corresponding to a multi-channel spectrum of an incoming radio frequency (RF) spectrum and digitally detecting a second signal strength corresponding to a selected channel of the incoming RF spectrum. Based on these values, one or more one gain stages of a receiver, such as a satellite television receiver for the incoming RF spectrum, may be controlled. Other embodiments are described and claimed.Type: ApplicationFiled: October 11, 2005Publication date: April 12, 2007Inventors: Ramin Khoini-Poorfard, David Trager
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Publication number: 20070081616Abstract: A dynamic DC offset removal apparatus and a dynamic DC offset removal method capable of accurately estimating a change position of a dynamic DC offset and a DC offset value before the change and a DC offset value after the change, thereby carrying out equalization processing on a reception signal whose dynamic DC offsets are removed, and improving a bit error rate characteristic.Type: ApplicationFiled: October 6, 2006Publication date: April 12, 2007Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Tomohiro YUI, Nobuhiro TAKAGI, Gou KAISE