Abstract: Methods and systems are provided for allowing an FDD radio to be configured to operate in Rx-high/Tx-low or Rx-low/Tx-high modes of operation. In accordance with one aspect, this is achieved in an FDD radio configuration that includes multiple switches, multiple Rx electronics, and multiple Tx electronics, allowing a diplexing filter to have selectively coupled to its high and low terminals desired Tx or Rx paths, such as to allow the radio to operate in one or another mode.

Abstract: A terminal (200) and method for operation thereof for use in a wireless communication system (100), the terminal including a plurality of antennas (215, 235, 255) and a plurality of receiver chains (217, 237, 257) each including an associated one of the antennas, the terminal being operable to receive a signal including a plurality of time divided portions including a first portion (303) and a second portion (304), characterised in that the terminal is operable in a manner such each of the plurality of receiver chains is active when the first portion of the signal is being received and at least one of the receiver chains is inactive when the second portion of the signal is being received.

Abstract: An adaptive antenna receiver whose follow-up performance is improved with respect to the angle change of the arrival direction of a desired signal. An antenna weight adaptive update section (11-1) adaptively updates the antenna weight according to a signals received by each antenna element and an error signal obtained from a desired signal corrected based on transmission channel estimation. An antenna weight direction constraint section (12-1) performs the constraint process for the antenna weight obtained by the antenna weight adaptive update section (11-1) to maintain the beam gain constant in the arrival direction of the desired signal. A beamformer (2-1) receives the desired signal through an array antenna using the antenna weight which has undergone the constraint process performed by the antenna weight direction constraint section (12-1).

Abstract: A streaming service method and system of the present invention is provided for improving service quality and reliability by transmitting data through an optimal wireless link selected among multiple wireless links available between a server and a client. A streaming service method for a system including a server and at least one client that can establish more than two wireless links with each other includes sending a link selection request message containing a content identifier from the server to the client; selecting, at the server, one of the wireless links for transmitting a content indicated by the content identifier; sending a link selection response message containing a link identifier of the selected wireless link from the server to the client; and receiving, at the client, the content transmitted by the server through the wireless link established with reference to the link identifier.

Abstract: Methods of forming scalable systems and scalable systems on an integrated circuit (SoC) are provided. First and second radio frequency (RF) systems are disposed on first and second substrates, respectively. A first processor that is configured to process the first RF system is disposed on a substrate separate from the first substrate and a second processor that is configured to process the second RF system is disposed on a substrate separate from the second substrate. The first processor and the first RF system are stacked one on top of the other to configure a first RFSoC and the second processor and the second RF system are stacked one on top of the other to configure a second RFSoC. The first and second RFSoCs are disposed either in a horizontal plane, laterally spaced from each other, or in vertically stacked planes, one above the other.

Abstract: Embodiments of twin media access control apparatus and methods are generally described herein. Other embodiments may be described and claimed. The present arrangement provides for eliminating a functional media access control unit from one or more processors in a processor/co-processor(s) situation. A dual media access control interface of the processor handles both the network requests of the processor and all co-processors, such as proactive management processors.

Abstract: A radio base station, upon receipt of a traffic channel assignment request from a mobile station, creates a piece of traffic channel assignment information, attaches a diversity reception stop instruction to the information, and transmits the information with the diversity reception stop instruction to the mobile station as a response to the traffic channel assignment request.

Abstract: In a method and an apparatus (1) for transmission diversity mode detection in a mobile radio receiver using a decision function, the decision function which is used for detection of the transmission diversity mode is based on the coherent processing of two successive input signal data tuples {r(k);r(k+1)} and {r(k+2);r(k+3)} and recording of a phase offset between the two tuples.

Abstract: An N×M crosspoint switch allows a signal from any one of the N inputs to be routed to one or more of the M crosspoint switch outputs. The switches within the crosspoint switch can be configured as voltage mode or current mode switches. In voltage mode switching an input to the crosspoint switch is provided to an input device, such as an amplifier, having a low output impedance. The output of the low impedance device is provided to a switch that connects the output of the low impedance device to a high input impedance device, such as a band translation device. In current mode switching, the low impedance output of the input device is connected to selectively activated high isolation transconductance devices having high input impedances. The outputs of the transconductance devices are connected to low impedance devices that operate as summing nodes.

Abstract: In a wireless transmitting device which performs transmission by an OFDM using a plurality of subcarriers orthogonal to each other, a plurality of preambles to which a plurality of different subcarrier groups selected from a plurality of subcarriers within an OFDM signal band are allocated are transmitted by using a plurality of transmit antennas, and data is transmitted by using the antennas after the preambles are transmitted.

Abstract: A low voltage differential signaling transceiver includes a transmitter and a receiver, the transmitter having a first terminal in signal communication with a transmission line, a source resistance in signal communication with the first terminal, a switch in signal communication with the source resistance and in switchable signal communication from ground or an input voltage, a voltage regulator in switchable signal communication with the switch for providing the input voltage to the switch, and a voltage controller in signal communication between the first terminal and the voltage regulator for controlling the input voltage to provide a controlled voltage to a receiver; and the receiver having an amplifier having a first input, a first pad in signal communication with the first input, a load resistance, and a second pad in signal communication with the load resistance, where the first and second pads are both in signal communication with one end of a first transmission line.

Abstract: A method for controlling diversity receivers in a wireless communication device includes the steps of: determining if the wireless communication device is experiencing poor coverage (220), using a first receiver and a second receiver for diversity (230) if the wireless communication device is experiencing poor coverage, and using the second receiver for scanning (240) if the wireless communication device is not experiencing poor coverage. Thus, diversity can be used when needed to improve reception. Both receivers, however, can be used in a non-diversity mode to reduce current drain or to speed up channel acquisition when coverage is not poor.

Abstract: An electronic device comprises an antenna, a first wireless communication module coupled to the antenna, which is complied with a first communication protocol, a second wireless communication module coupled to the antenna, which is complied with a second communication protocol, and a filter coupled to the antenna, the first wireless communication module, and the second wireless communication module. The filter distributes a signal received by the antenna to one of the first wireless communication module and the second wireless communication module in accordance with frequency of the signal.

Abstract: An enhanced radio system is disclosed that provides for the capture and playback of one or more radio stations. The user may tune to a station, or scan through stations, rewind to hear what was missed (even while the system is turned off), and fast-forward through undesired content. The system allows a user to rate content, and to be notified when that content is being played on any station. The system may recognize content as it is broadcast and may jump to desirable content, save a copy of desirable content, or skip over undesirable content. The system may make radio station recommendations. The system may support multiple sets of configuration information to allow its use by multiple listeners and in multiple locations. The system allows the user to respond easily to radio content, download and upload audio content, and send radio content to another user. The system may allow a user to download information about content that the user wishes to record a copy of.

Abstract: A method and apparatus for efficiently processing packets from neighboring basic service sets (BSSs) to characterize the traffic within a wireless local area network (WLAN), mesh network, or similar wireless communication system is disclosed. The apparatus may be an access point (AP) in a BSS which includes a measurement period (MP) interval timer, a promiscuous measurement period (PMP) timer and a receiver filter. An interval of the MP interval timer is set while the receiver filter is enabled. During the interval, the AP only processes packets which originated from the AP's own BSS. When the MP interval timer expires, a value of the PMP timer is set to a predetermined time duration and the receiver filter is disabled. During the predetermined time duration, the AP processes all received packets irrespective of which BSS the packets originated from. The receiver filter is again enabled when the PMP timer expires.

Abstract: Global Positioning System (GPS) and non GPS position finder, emergency, multiple input multiple output (MIMO), multimode, spread spectrum, code division multiple access (CDMA), Global Mobile System or Global System Mobile (GSM) and orthogonal frequency division multiplex (OFDM) communication systems. Position finder and emergency communication multiple input multiple output (MIMO) system and a receiver having multiple inputs for reception and demodulation of position finder signals to position finder baseband signals. A processor for processing position finder signals with a signal containing an emergency number. A processors for processing signals to provide cross-correlated shaped in-phase and quadrature-phase baseband signals, spread spectrum and OFDM baseband signals. A control unit for control and selection of one of the jointly processed signals and a selector for providing the selected signal to a modulator.

Abstract: An integrated circuit radio receiver includes radio frequency (“RF”) front end circuitry for receiving and transmitting digital data received through a wireless interface. A baseband processor is operable to process the digital data received through the wireless interface. A first logic is operable to provide a first level of digital filtering for a first received digital data signal format. A second logic is operable to provide the first level of digital filtering and derotation for a second received digital data signal format. A third logic is operable to provide a second level of digital filtering for a third received digital data signal format wherein the second level of digital filtering is reduced in comparison to the first level of digital filtering. Selection logic is operable to select between the first, second and third logic for processing the digital data received through the wireless interface.

Abstract: A wireless local area network (WLAN) system can have multiple antennas to improve signal detection and decoding. A WLAN receiver in such a system includes multiple amplifiers that can appropriately size an incoming signal and an automatic gain control unit to process the received incoming signals. The amplifiers of a chain of the WLAN receiver, i.e. an antenna and associated receiver components, can be adjusted with computed gains. To optimize the wireless system detection and decoding, the automatic gain control unit can advantageously compute these gains for each amplifier in the WLAN receiver.

Abstract: A low-cost diversity receiver includes two receiver units for a primary path and a secondary/diversity path. The first receiver unit is compliant with, for example, IS-98D requirements. The second receiver unit is not fully compliant with the IS-98D requirements (e.g., may meet requirements for sensitivity but not for out-of-band rejection). The second receiver unit is wideband and designed with lower power consumption, less area, and lower cost than the first receiver unit. For a multi-antenna receiver, the two receiver units are used to simultaneously process two received signals from two antennas. For a single-antenna receiver, one of the two receiver units is used to process a received signal from one antenna. For a dual-band design, each receiver unit can operate at two frequency bands. Narrowband circuit blocks are used for the first receiver unit, and wideband circuit blocks are used for the second receiver unit.

Abstract: Receivers accommodating frequency band selection methods in wireless communications systems are described. Different frequency bands are associated with different alternative carrier frequencies and/or base station cell and/or sector transmitter connection alternatives. Mobile node receivers include two receiver chains, each chain processing signals corresponding to a carrier. In some embodiments, each receiver chain includes its own controllable RF module, and individual carrier band selection is performed in each RF module. In some embodiments, the two receiver chains share a common RF module; however, each chain includes its own controllable baseband filter. In various embodiments, the first chain has higher complexity than the second chain. In most embodiments, each chain uses the same technology, e.g., spread spectrum OFDM or CDMA.

Abstract: Herein disclosed is a communication apparatus to be operative in combination with first and second external devices for respectively producing first and second information, comprising: first information receiving means for receiving the first information from the first external device; communication performing means for performing a communication with the second external device by receiving the second information from the second external device and producing an exchange information to be transmitted to the second external device and; controlling means for controlling the communication performing means by assuming two different operational states including a first operational state to allow the communication performing means to be operable to perform the communication with the second external device and a second operational state to allow the communication performing means to be inoperable to perform the communication with the second external device, the controlling means being adapted to selectively assume th

Abstract: In one exemplary embodiment, method including: receiving a first wireless communication with at least a first and second receiver utilizing a diversity method; and, in response to determining that simultaneous reception of a second wireless communication is desired, signaling that at least the second receiver is to be unavailable for the first communication. In another exemplary embodiment, method including: receiving a first wireless communication with at least a first receiver; receiving a second wireless communication with at least a second receiver; and in response to determining that reception of the second communication is to end, signaling that at least the second receiver is to be available for use. In another exemplary embodiment, method including: receiving, by a first apparatus, a timing of a second apparatus' periodic reception; and adjusting a transport format of a wireless communication sent from the first apparatus to the second apparatus based on the timing.

Abstract: A dual receive path for a wireless communication device having one synthesizer that drives one or two receive VCOs.

Abstract: A first receiver frequency reference is passively coupled to a second receiver by tapping a signal directly from the resonant element, such as a crystal, of an oscillator in the first receiver to drive the input of the second receiver. The sinusoidal signal from the resonant element is relatively free of harmonics and minimizes interference that could be caused by harmonics of a square wave signal coupling or an amplified signal. The oscillator of each receiver can be selectively enabled or disabled to allow the receiver to either generate or receive the frequency reference. This technique of coupling can be used to couple a frequency reference signal between integrated circuit receivers.

Abstract: A communication system comprises a first signal adjusting unit for amplifying a first signal received by a first antenna; a second signal adjusting unit for amplifying and phase-shifting a second signal received by a second antenna to generate a phase-shifted signal; first and second mixers for respectively mixing signals generated by said first and second signal adjusting units to generate respective first and second intermediate frequency signals; a signal combiner for generating an output signal provided to a demodulator, the output signal comprising at least one of the first intermediate frequency signal and/or the second intermediate frequency signal; and a phase detector for extracting phase information from the signals generated by the first and second signal adjusting units.

Abstract: If it is judged by a signal from a first signal processing unit that a signal of a first communication system is not received and it is judged by a signal from a second signal processing unit that a signal of a second communication system is received, wireless communication is performed by the second communication system. If it is judged that the signals of the first and the second communication systems are received, a system judging unit judges which communication system is to be used for the wireless communication, based on the signals from the first signal processing unit and the second signal processing unit. If the wireless communication is to be performed by the first communication system, diversity reception or transmission is performed by first and second antenna elements.

Abstract: According to an embodiment, a distributed antenna system (DAS) is provided with functionality for determining the location of a mobile station within the DAS. The DAS may be of the type that includes a plurality of antennas located within a multi-floor building, each antenna radiating to define a respective coverage area in which the mobile station can communicate. The antennas are communicatively linked with a controller, and the controller communicates over an air interface with a radio access network so as to provide connectivity between the antennas and the radio access network. In operation, the system may determine that a given one of the antennas has received a strongest signal from the mobile station, and may transmit an indication of the geographic coverage area of the given antenna into the radio access network, as a representation of the location of the mobile station.

Abstract: A method includes receiving a plurality of signal inputs from a plurality of antenna elements, determining a signal strength of the plurality of signal inputs, receiving a selection of a reduced power consumption and determining a combination of the plurality of signal inputs to combine in a combined signal, the combination having a number of signal inputs that is less than all of the plurality of signal inputs.

Abstract: In a heterodyne receiver, the effect of an image interference signal that occurs in a case where a low intermediate frequency is used is alleviated. Circuits (12I), (12Q), (13I), (13Q), and (14) are provided to switch a heterodyne system between an upper heterodyne system and a lower heterodyne system. The switching circuits (12I) to (14) switch the heterodyne system into one of the upper heterodyne system and the lower heterodyne system with less image interference on the basis of each reception frequency.

Abstract: A wireless transmission device capable of transmitting media from different channels concurrently. The transmitter of the device places the inputted TV signals and an audio/video signal on different segments of a frequency spectrum, combines the signals of all segments into one combined signal, and transmits the combined signal as a radio frequency signal so as to transmit signals from different channels at the same time. Meanwhile, a controller in the receiver of the device selects a needed channel signal from the received radio frequency signal according to a selection signal. Therefore with one A/V transmitter and multiple A/V receivers, multiple-channel media transmission and multiple-channel media reception is achieved.

Abstract: The claimed subject matter relates to enabling antenna switching in a wireless terminal that has multiple receive antennas per receive chain via soft-demodulation and interleaving of concatenated code received in a strip channel. A coherent demodulation protocol may be performed to estimate an SNR for a first antenna during a first time period, and a non-coherent demodulation protocol may be utilized on the strip channel to estimate an SNR for at least one other antenna during a second time period. SNRs may be compared and the terminal may select the antenna with the highest SNR for a next transmission superslot.

Abstract: An antenna-switching diversity receiver is capable of switching antennas without bringing about deterioration of reception characteristics even when applied to the CDMA communication method. A TFCI bit decoding/determination unit decodes TFCI bits that have been extracted by a TFCI bit extractor and determines the presence or absence of communication control data based on the TFCI bits that have been decoded. An antenna switching control unit uses a timer to check for the presence or absence of communication control data in each of fixed time intervals based on the determination results of the TFCI bit decoding/determination unit and then controls the antenna switch in intervals that lack communication control data to measure the reception level of the common pilot channel at the other antenna that differs from the antenna that is currently receiving and then select the antenna having the higher reception level.

Abstract: The circuit size of a diversity receiver for an orthogonal frequency division multiplexing signal is reduced, and the diversity effect is increased, by providing a power ratio comparator that calculates a difference value as a ratio of powers derived from channel estimation results for subcarrier components received from two antennas (11), (21) and compares the calculated difference value with a predetermined threshold, and a selective/equal gain combining selector (33) that outputs one of the received demodulated signals when the comparison result indicates that the calculated difference value is greater than the threshold value.

Abstract: Methods and systems for communicating information via a plurality of different networks are disclosed herein. Aspects of the method may comprise receiving broadcast information in a mobile terminal via a VHF/UHF broadcast communication path. Cellular information in the mobile terminal comprising voice and data may be received via at least one cellular communication path. Reception in the mobile terminal may be switched between reception of the broadcast information via the VHF/UHF broadcast communication path and the cellular information via the at least one cellular communication path based on a preference indicated via the mobile terminal. The preference may be indicated via a software-controlled interface and/or a user-controlled interface. Reception in the mobile terminal may be switched between reception of the broadcast information via the VHF/UHF broadcast communication path and the cellular information via the at least one cellular communication path based on user input.

Abstract: A diversity antenna apparatus has N (N is 3 or more integer) elements of antennas which receive radio signals, a priority storage unit configured to store priority data of the N elements of antennas, a first antenna selector which selects two antennas from among the N elements of antennas based on the priority data, a second antenna selector which selects one of the selected two antennas based on a prescribed condition, and a priority update unit configured to update priority data of the N elements of antennas stored in the priority storage unit based on the antenna selected by the second antenna selector.

Abstract: An apparatus for reception of a mobile broadcast is disclosed. The apparatus includes a mobile broadcast reception unit for receiving a broadcast signal transmitted through a mobile broadcasting network, demodulating the broadcast signal into a baseband signal, and outputting the baseband signal; and a wireless Internet broadcast reception unit for receiving a broadcast signal transmitted through a wireless Internet network, demodulating the broadcast signal into a baseband signal, and outputting the baseband signal, and the apparatus also includes a post-processing unit for checking reception sensibilities of the mobile broadcast reception unit and the wireless Internet broadcast reception unit, selecting and decoding one signal of output signals of the mobile broadcast reception unit and the wireless Internet broadcast reception unit according to a result of the checking, and outputting the selected and decoded signal.

Abstract: A system and method is described for managing a phone call to a phone device of a personal digital assistant, the phone call being transmitted from a device in a mobile phone network. In one example, the method involves determining a status of a radio switch of the personal digital assistant. The personal digital assistant determines a status of the network coverage of the phone device. In other words, the personal digital assistant determines the relative strength of the phone call signal that is transmitted to the phone device from the mobile phone network. If the radio switch is turned on and the network coverage is adequate, the phone device receives the phone call. A user of the personal digital assistant preferably has an option of answering or not answering the phone call. If the phone call is not answered, the phone call is preferably redirected to a voicemail application.

Abstract: An antenna system with two antennas provides the possibility to operate at least two different radio communication systems with one radio communication system operating on one single antenna of the antenna system and another radio communication system operating on both antennas of the antenna system wherein the antenna system serves as a diversity antenna system. This kind of antenna system is designed to be employed particularly in small devices with restricted measurements. Especially, an implementation of an antenna system for dual use of GSM/E-GSM/DCS operation and WLAN operation is presented.

Abstract: A wireless communication apparatus is equipped with a plurality of antennas. A switch leads a received signal by way of an antenna selected according to an antenna switching signal to a demodulator unit. Software installed in a MAC unit generates a first switching signal. A diversity control unit generates a second switching signal by the built-in hardware circuit. The first switching signal is used as an antenna switching signal during a packet receiving ready period, while the second switching signal is used as an antenna switching signal during a period for receiving a packet.

Abstract: A high frequency switch module comprises an antenna port, a plurality of transmission signal ports, a plurality of reception signal ports, a high frequency switch, a plurality of LPFs and a plurality of phase adjusting lines. The high frequency switch allows one signal port among the transmission signal ports and the reception signal ports to be selectively connected to the antenna port. The high frequency switch includes a field-effect transistor made of a GaAs compound semiconductor. Each of the phase adjusting lines connects the high frequency switch to each of the LPFs. Each of the phase adjusting lines adjusts a phase difference between a progressive wave of a harmonic resulting from a transmission signal and produced at the high frequency switch and a reflected wave resulting from reflection of the progressive wave from each of the LPFs such that the power of a composite wave made up of the progressive wave and the reflected wave is made lower at the point of the high frequency switch.

Abstract: An embedded digitization system enables a military platform to receive, transmit and process a variety of types of information for a variety of purposes. An apparatus and method provides a means to ensure information interoperability between the invention and external sources. The invention provides a development environment that enables a developer to automatically and interactively develop the middleware services and functions that contain the aspects for interoperability with external sources. The invention ensures interoperability through reuse of functions and services known to satisfy requirements for interoperability. When functions and services that satisfy requirements for interoperability are not available, the invention provides a means to develop new functions and services that satisfy requirements for interoperability.

Abstract: A radio frequency transceiver for a wireless local area network (LAN) may have two or more antennae. An active antenna that delivers a data-bearing signal having a signal quality at least as good as any of the antennae may be selected based upon measurements of the signal quality during a preamble field of data frames having a substantially longer preamble field than other data frames.

Abstract: A direct conversion receiver including a filtering system for improving signal reception in the receiver is disclosed. In one embodiment, the direct conversion receiver comprises a first filter adapted to receive a plurality of receive signals comprising a receive band. The first filter is configured to attenuate a frequency range of the receive band to de-emphasize signals within of the frequency range. The direct conversion receiver also comprises a second filter coupled to a signal processing logic output and is configured to amplify the signals in the frequency range of the receive band, the signal processing logic being coupled to the output of the first filter and configured to substantially attenuate a plurality of unwanted signals in the receive band.

Abstract: A diversity receiver system includes a plurality of radio receivers that each provide a uniquely associated receiver output signal and a uniquely associated receiver control signal indicative of the amount of gain applied by the associated radio receiver to create the uniquely associated receiver output signal. A selection mechanism receives the receiver control signals, and determines which of the radio receivers has applied the smallest gain correction to its associated receiver output signal, and provides a diversity receiver output signal indicative of the receiver output signal associated with the receiver that applied the smallest gain correction.

Abstract: A signal received under a multipath condition is buffered in storage memories 50a and 50b comprising two banks, and while overlap of write and read is allowed, the received data is supplied to matched filters 60a and 60b as much as possible, in a pipeline manner, and in-phase addition of four symbols per unit is performed in in-phase adders 80a and 80b. In the buffering in storage memories 50a and 50b, processor 40 adaptively changes the search period based on timing information acquired in advance.

Abstract: For determining use of receive diversity in a mobile station, a control system (210 or 401) determines a demand level for use of communication resources. A transmitter (300) communicates a message indicating use of receive diversity at a mobile station based on the determined demand level. In another aspect, a receiver (200) receives a channel and determines transmit power level of the channel for being at a lower or upper transmit power level limit. The control system (210 or 401) controls receive diversity by selecting a number of receiver chains (290) based on the determined transmit power level. In another aspect, receiver (200) receives a channel and determines a channel condition of the channel and duration of the channel condition. Control system (210 or 401) controls receive diversity by selecting a number of receiver chains (290) based on the determined channel condition and the duration.

Abstract: A wireless communication system exposes first stage filtered energy estimates to a second stage filter whose length dynamically varies with time. With the second stage filter, it is possible to further suppress noise in low SNR conditions without affecting the overall filtering response time.

Abstract: Methods and apparatus implementing spatial processing in a remote unit. In general, in one aspect, a remote unit in accordance with the invention includes a plurality of antennas and a spatial processing unit coupled to the plurality of antennas.

Abstract: A Write Broadcast system and method uses a base station to write sent data to all or some selected number (sub group) of tags in a base station field simultaneously. By unselecting the tags that have been successfully written to, and requesting a response from the remaining tags in the field (or sub group), the system determines, by receiving a response to the request, that there are tags in the field (sub group) that were unsuccessfully written to. Another Write Broadcast signal is sent to these tags. The system is useful for quickly (simultaneously) “stamping” information on the tag memory of a large number of tags in the field of the base station.

Abstract: Signals from multiple antennas are evaluated in a wireless device having one receiver chain and the antenna receiving the highest quality signals is selected. The signal quality from the multiple antennas may be evaluated using the short symbols in the preamble or the beacon signals and the antennas dynamically selected to improve the performance of the wireless communications device.