Abstract: Embodiments of the present invention provide a dual band adaptive concurrent processing method and apparatus. In the embodiments of the present invention, by using statistical information of services at first and a second frequency bands in the Nth adjustment period, performance of the services at the frequency bands in an adjustment period may be acquired. Based on the statistical information, and a quality of service (QoS) requirement that the services at the two frequency bands need to meet, a second coefficient of proportionality between timeslots occupied by the services at the two frequency bands in the (N+1)th adjustment period may be determined, so that switching control on first and second channels may be performed in the (N+1)th adjustment period according to the determined second coefficient of proportionality.

Abstract: Certain aspects of the present disclosure provide an apparatus for wireless communications. The apparatus comprises an interface configured to receive a plurality of channel estimation sequences, wherein each one of the plurality of channel estimation sequences is received on a respective one of a plurality of channels, each one of the plurality of channels having a respective one of a plurality of frequency bands. The apparatus also comprises a processing system configured to generate a channel estimation for each one of the plurality of channels using the respective one of the plurality of channel estimation sequences, and to generate a collective channel estimation based on the channel estimations.

Abstract: A system and method for generating a channel statistics dependent frequency hopping pattern that requires low computational complexity and simultaneously maximizes channel capacity and minimizes the symbol error rate or bit error rate under partial band tone interference and Rician or other fading environments. The system includes one or more transmitting units and one or more receiving units communicating over a wireless communication network. A signal generated at one of the transmitting units is modified via the channel statistics dependent frequency hopping pattern as generated via one of the receiving units for improved signal accuracy and avoiding interferer detection and/or interference hits.

Abstract: Methods and apparatus are provided for processing a data value in a read channel of a memory device. The data value provided to a general purpose processor for processing. The data value is not decoded data and may comprise one or more of a raw data value and an intermediate data value. The data value can be provided to the general purpose processor, for example, upon a detection of one or more predefined trigger conditions. A data value can be obtained from a memory device and then be redirected to a general purpose processor. The data value is not decoded data. The redirection can be conditionally performed if one or more predefined bypass conditions exist. The general purpose processor is optionally time-shared with one or more additional applications.

Abstract: Stable clock synchronization is ensured even under a multi fading environment such as the non-line-of-sight communication. On a transmission side, multiplying a clock signal by a spreading code, a spread-spectrum clock signal is generated whose spectrum being made to spread; frequency conversion is performed on a signal obtained by superimposing an information signal on the spread-spectrum clock signal and a radio signal is transmitted by wireless. On the other hand, on a receiving side, the radio signal is received, frequency conversion is performed on the radio signal, and a frequency-converted radio signal is divided into two lines. A clock signal extracted by performing spectrum despreading on one of divided radio signals by multiplying a spreading code; and clock synchronization is performed on other one of the divided radio signals using the clock signal having been extracted.

Abstract: A method and apparatus for collecting vehicle data is provided. The method for collecting vehicle data in a vehicle data collection server communicating with a vehicle through a wireless network includes receiving vehicle data corresponding to first to Nth data items from a first vehicle. When alternative data collection vehicles are needed, the method searches for the alternative data collection vehicles in a group of vehicles, for each of the first to Nth data items, receives vehicle data corresponding to at least one of the first to Nth data items through the searched alternative data collection vehicles, and stores the vehicle data received from the first vehicle and the vehicle data received from the alternative data collection vehicles.

Abstract: A method for transmitting and receiving broadcast signals in a radio broadcasting communication system is provided together with an associated apparatus. The transmitting method includes creating a frame having a preamble slot, a data slot and a control slot, and sending the created frame. The control slot has information for assigning the data slot to one of an uplink and a downlink. The receiving method includes receiving such a frame wherein the control slot has scheduling information for each user, and extracting the data slot from the received frame by using the scheduling information in the control slot. These methods may realize an interactive broadcasting by separately employing broadcast signals for the uplink and downlink.

Abstract: There is provided a detection arrangement for detecting an attack to internal signals in a semiconductor device. The detection arrangement comprises a first input terminal, a second input terminal, and a comparison unit. The first input terminal is adapted to receive a first signal being indicative for a signal at a first stage of a driver of the semiconductor device, the driver being capable to drive signals internally to the semiconductor device. The second input terminal is adapted to receive a second signal being indicative for a signal at a second stage of the driver of the semiconductor device. The comparison unit is adapted to compare the first signal and the second signal and to determine a time period during which the signals are equal, wherein the determined time period is indicative for a potential attack, if the determined time period is above a predefined threshold.

Abstract: RFID apparatus includes transmission means for transmitting an RF signal; reception means for receiving a modulated RF signal; and demodulation means for demodulating a received modulated signal. The apparatus comprises generating means for generating a RF signal dependent on an incoming RF signal, the incoming RF signal being generated by different apparatus, and the apparatus is arranged to transmit the generated RF signal such that the generated RF signal interferes with the incoming RF signal. The RFID apparatus has both the means to respond to an RF reader device, in tag emulation mode, and means to function as an RF reader device, in reader mode.

Abstract: A wireless field device that performs a wireless communication with other field devices in a wireless network through a gateway. The device includes: a battery incorporated in the field device to activate the field device; and a wireless communication module configured to exchange radio signals with the gateway to perform the wireless communication with said other field devices. When the field device starts procedure for joining in the wireless network, firstly, the wireless communication module continuously accesses the gateway in a first period to receive an advertisement signal from the gateway, and when the wireless communication module fails to receive the advertisement signal in the first period, the wireless communication module intermittently accesses the gateway until receiving the advertisement signal from the gateway.

Abstract: The disclosure relates to methods and apparatuses that allow for channelization code allocation adapted for uplink MIMO transmissions. A method for use in a user equipment of a telecommunication system comprises spreading data symbols of a plurality of streams to be transmitted from the user equipment as MIMO transmissions. The step of spreading the data symbols comprises allocating, for each stream, at least one channelization code (62) to be applied for spreading the data symbols of the stream. The plurality of streams are allocated channelization codes (62) from a predefined code tree (61) of applicable channelization codes such that any channelization code (62) is allocated to more than one stream only if there is no applicable channelization code left in the code tree (61) which currently is not allocated for any stream. The channelization code allocation scheme makes it possible to avoid inter-stream interference in many scenarios of uplink MIMO transmissions.

Abstract: An apparatus and method for transmitting data with conditional zero padding is provided. In accordance with an embodiment of the disclosure, a transmitter transmits data to a receiver by transmitting symbols such that each symbol is preceded by a cyclic prefix of a fixed length and the symbol conditionally includes enough zero padding to avoid ISI (Inter-Symbol Interference) between consecutive symbols. In some implementations, if the fixed length for cyclic prefixes is long enough to avoid ISI between consecutive symbols, then the symbols may omit zero padding. Otherwise, the symbols may include enough zero padding to avoid ISI between consecutive symbols. The zero padding may be zero tail or zero head.

Abstract: An apparatus and method for transmitting data with conditional zero padding is provided. In accordance with an embodiment of the disclosure, a transmitter transmits data to a receiver by transmitting symbols such that each symbol is preceded by a cyclic prefix of a fixed length and the symbol conditionally includes enough zero padding to avoid ISI (Inter-Symbol Interference) between consecutive symbols. In some implementations, if the fixed length for cyclic prefixes is long enough to avoid ISI between consecutive symbols, then the symbols may omit zero padding. Otherwise, the symbols may include enough zero padding to avoid ISI between consecutive symbols. The zero padding may be zero tail or zero head.

Abstract: A wireless device, and corresponding method, having a receiver configured to receive a signal having in-phase and quadrature components; a non-linear filter demodulator configured to translate noncoherently the in-phase and quadrature components into a phase domain signal; a coherence acquisition unit configured to estimate and correct at least one coherence parameter based on the in-phase and quadrature components and the phase domain signal; and a detector configured to detect information in the phase domain signal.

Abstract: A method can be used for channel mapping based on frequency hopping. A working channel label of a node is computed according to the number of working channels of the node in frequency hopping mode, an identifier of the node, and a time parameter corresponding to a current superframe. A working channel is determined according to the working channel label. Data is transmitted on the working channel within the current superframe.

Abstract: A method for data transmission. The method including the steps of generating at least one resource tree, mapping a plurality of resource elements into respective leaf nodes in the at least one resource tree according to a certain mapping scheme, with each node in the at least one resource tree representing a resource allocation scheme for data transmission, and transmitting data using a resource allocation scheme selected from among the plurality of resource allocation schemes represented by respective nodes in the at least one resource tree. In response to reception of the data, a receiver decodes the data by recursively applying the plurality of resource allocation schemes represented by respective nodes in the at least one resource tree until the data is decoded.

Abstract: A limited feedback method and apparatus for two-way relay channels with physical network coding are disclosed. An embodiment of the invention provides a method of providing parameters as feedback to two terminals according to channel conditions by a relay for two-way communication in a two-way relaying system using PNC (physical network coding). This method includes: (a) quantizing phase difference information of two-way channels of the two terminals in consideration of whether or not a ratio of a minimum distance between constellation points is periodic according to modulation level; and (b) transmitting feedback information, which contains at least one of the phase difference information and the power control information of the two terminals, as a limited number of bits to the two terminals. Here, the number of bits for the phase difference information or the number of bits for the power control information is determined according to the modulation level.

Abstract: The invention provides, in some aspects, an improved control network (or portion thereof) that includes a plurality of nodes, each associated with respective control devices (e.g., controllers, actuators, sensors, etc.). Each of the nodes also includes one or more radios supporting wireless communications pathways with one or more of the other nodes, which pathways together form at least part of a mesh network. At least a first one of the nodes wirelessly transmits information simultaneously, or substantially simultaneously, over at least two pathways formed in a mesh network to a second one of the nodes. The radio(s) of the first node, according to related aspects of the invention, sends that information wirelessly at different frequencies along each of those pathways.

Abstract: A method in a communication device and a communication device (100) for adapting a transmission of data are provided. The transmission is transferred from a first chip (110) to a second chip (120) over a chip-to-chip interface (104, 304). The chip-to-chip-interface comprises a wired connection between the first chip and the second chip which is comprised in the communication device. The communication device receives (201) the radio signal (330), comprising the transmission of data from another communication device. The communication device determines (202), from the received radio signal (330), modulation and coding information, which is used for determining (203) a channel quality. Further, the communication device (100) adapts (204) the transmission of data based on the determined channel quality of the received radio signal (330) in such way that at least the determined channel quality is obtained when transferring (205) the transmission of data over the chip-to-chip interface to the second chip.

Abstract: A receiver may comprise a sequence estimation circuit and operate in at least two modes. In a first mode, the sequence estimation circuit may process OFDM symbols received on a first number of data-carrying subcarriers to recover a number of mapped symbols per OFDM symbol that is greater than the first number. In a second mode, the sequence estimation circuit may process OFDM symbols received on a second number of data-carrying subcarriers to recover a number of mapped symbols per OFDM symbol that is equal to the second number. The second number may be equal to or different from the first number. While the receiver operates in the first mode, the sequence estimation circuit may be operable to generate candidate vectors and process the candidate vectors using a controlled ISCI model to generate reconstructed physical subcarrier values.

Abstract: Systems and methodologies are described that facilitate mapping multiple evolved packet system (EPS) bearers to a single relay eNB radio bearer. In particular, an upstream eNB can select a radio bearer of a downstream eNB for association to an EPS bearer; the selection can be based on a best effort match or substantially any logic. The upstream eNB can store an association between the radio bearer and EPS bearer for subsequent downstream packet routing. The upstream eNB can also provide an indication of the selected radio bearer to the downstream relay eNB to facilitate upstream packet routing therefrom. The upstream eNB can alternatively select the radio bearer of the downstream eNB for association to the EPS bearer based on a quality of service (QoS) class identifier (QCI) of the EPS bearer.

Abstract: Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method for the transmission of information in a wireless communication system comprises receiving a downlink message, wherein the downlink message includes a first control channel element; determining a first index using the location of the first control channel element; determining a second index; determining a first orthogonal resource using the first index; determining a second orthogonal resource using the second index; spreading an uplink message using the first orthogonal resource to form a first spread signal; spreading the uplink message using a second orthogonal resource to form a second spread signal; transmitting the first spread signal using a first antenna; and transmitting the second spread signal using a second antenna.

Abstract: A method of operating a transmitter (FIGS. 3A and 5A) is disclosed. The method includes receiving a sequence of data bits (DATA), wherein each data bit has a respective sequence number. A first data bit of the sequence is spread (508) with a first spreading code (504) determined by the sequence number (502) of the first data bit. A second data bit of the sequence is spread (508) with an inverse of the first spreading code (506) determined by the sequence number (502) of the second data bit. The first and second data bits are modulated (510) and transmitted (516) to a remote receiver.

Abstract: The present invention relates to a method for generating a reference signal, including: obtaining first control information, where the first control information indicates or includes cyclic shift related information which is used by a terminal belonging to a serving cell to send a reference signal; and sending the first control information to the terminal belonging to the serving cell, so that the terminal belonging to the serving cell generates the reference signal according to the cyclic shift related information which is indicated or included by the first control information and used by the terminal to send the reference signal, where a variation rule of a cyclic shift which the terminal belonging to the serving cell uses to generate the reference signal is the same as that of a cyclic shift which a terminal belonging to a coordinated cell uses to generate the reference signal.

Abstract: Methods and apparatus for correcting frequency errors between a carrier frequency of a signal received by a wireless device and a reference frequency local to the device. For certain aspects, such a method generally includes receiving a signal in a receiver having an LO producing a reference frequency, a radio frequency (RF) phase-locked loop (PLL), and a digital rotator, estimating a frequency difference between a carrier frequency of the received signal and the LO reference frequency, and applying the estimated frequency difference to the RF PLL and the digital rotator.

Abstract: Compressive sampling is used to generate pilot symbols to be transmitted over an array of antennas in a MIMO wireless communications device. A pilot symbol is transmitted over the array of antennas according to a spatially randomized antenna transmission function that randomly changes across the array of antennas. The randomized antenna transmission function may randomly select/deselect antennas and/or randomly change amplitude and/or phase of the pilot symbol transmission. Channel estimates can be constructed at a receiver based on the spatially randomized pilot symbols that were transmitted.

Abstract: Techniques for handling fingers with large delay spread through utility optimization are described. A first signal may be received, through a finger of a plurality of fingers in a receiver, at a time that is later than a reference time after a reference signal is received by a reference finger of the plurality of fingers. The reference signal may be included in an on-time group corresponding to a cell. The first signal may be included in a late group corresponding to a virtual cell. The first signal and the reference signal may be compared to one another. Based on the comparing, it may be determined whether to wait for additional signals in the late group or process the signals in the on-time group.

Abstract: A communication apparatus includes a Doppler shift amount calculation unit configured to calculate a Doppler shift amount of a reception signal which is received from an artificial satellite and is obtained by modulating a signal, for which spectrum spreading is performed by using a predetermined spread code, by a predetermined carrier frequency, a sampling interval setting unit configured to set a sampling interval, at which down sampling is performed for the reception signal, a down sampling unit configured to perform the down sampling for the reception signal, a coherent addition unit configured to perform coherent addition of the reception signal, a spread code generation unit configured to generate a spread code, and a phase detection unit configured to perform correlation calculation between a calculation result of the coherent addition and the spread code and detects a phase of the spread code of the reception signal.

Abstract: Acquiring a satellite signal, by, receiving a CDMA-modulated signal; generating a plurality of CDMA-type test signals comprising a reference test signal having a first chip duration, and a plurality of test signals delayed/anticipated of a corresponding time offset from the respective test reference signal, less than the chip duration; calculating correlations between the CDMA-modulated signal and the plurality of test signals for obtaining a plurality of correlation results; selecting, based on the correlation results, acquisition parameters associated to a candidate satellite signal; acquiring or rejecting the acquisition parameters selected based on the correlation results.

Abstract: A communication node (115) with is arranged to receive signals from at least one antenna (120). A frequency domain conversion is executed (201) for two or more antenna signals by receiving (201a) a continuous signal from one of the at least one antenna (120), splitting (201b) the continuous antenna signal into windowed signals, and performing (201e) a frequency domain conversion of the windowed signals. Then, a channel estimate based on a frequency converted pilot signal is provided (202) by extracting (202a) a pilot signal, splitting (202b) the pilot signal into windowed signals, performing (202d) a frequency domain conversion of the split pilot signal; and providing (202e) a channel estimate of the frequency converted pilot signal. Diversity combined signals are provided (203) by performing (203a) diversity combining based on the frequency converted windowed signals and the channel estimate, and by combining (203c) the diversity combined signals.

Abstract: Apparatus for identifying a communicating mobile terminal comprises an electromagnetic coupling device, an ultra-wide-band radio subsystem and a monitoring subsystem. The electromagnetic coupling device defines an exclusive zone for electromagnetic coupling between the device and the communicating mobile terminal, The ultra-wide-band radiofrequency subsystem simulates the availability to communicate with the mobile terminal of at least one base station of a telecommunication network. The monitoring subsystem recognizes a unique digital signature of the communicating mobile terminal implementing samples of an electromagnetic trace of a message sent by the mobile terminal in attempt to connect to a simulated base station.

Abstract: A method for identifying the presence of an electronic transmission comprising detecting, by a detecting device, the presence of a burst of electromagnetic energy that results from the presence of an original carrier signal and transmitting, by a transmitting device, a spread spectrum meta-carrier signal within a portion of a bandwidth of the original carrier signal, wherein the meta-carrier signal contains information about the original carrier signal and is transmitted such that the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier signal during the presence of the burst of electromagnetic energy.

Abstract: Binary Offset Carrier (BOC) is the agreed modulation for signals of next generation Global Navigation satellite systems (GNSS). Compared to current phase shift keying (PSK) modulation by a code, there is a further modulation by a sub-carrier. There is a known major difficulty with BOC called ‘false lock’ where early/late gates settle on the wrong peak of the multi-peaked correlation function. This invention eliminates the problem by eliminating that correlation. Instead, a two dimensional correlation is tracked independently to realize a dual estimate. An unambiguous lower accuracy estimate derived from the code phase is used to make an integer correction to a higher accuracy but ambiguous independent estimate based on the sub-carrier phase. The actual receiver may adopt a triple loop, instead of the usual double loop, where carrier phase, sub-carrier phase and code phase are tracked independently but interactively.

Abstract: A mobile communication terminal is provided, which comprises: a first antenna, configured to receive a high-band radio frequency (RF) signal from the outside; a wireless transceiver, configured to acquire the high-band RF signal from the first antenna and generate a first base-band signal; a base-band processor, configured to acquire the first base-band signal from the wireless transceiver and modulate the first base-band signal, and further generate a second base-band signal and a third base-band signal; the wireless transceiver being further configured to convert the second base-band signal into a to-be-transmitted high-band RF signal and convert the third base-band signal into a to-be-transmitted low-band RF signal; a second antenna, configured to acquire and transmit the to-be-transmitted high-band RF signal and the to-be-transmitted low-band RF signal; wherein the second antenna is further configured to receive a low-band RF signal from the outside.

Abstract: Provided is a wireless communication technique capable of supporting communication using a single component carrier, and communication using a plurality of component carriers. The communication using the plurality of carriers comprises a processing means for performing the signal processing in accordance with each of the carriers with respect to the common signal sequence used by the plurality of carriers. The present invention makes it possible to cope with the communication employing a single component carrier and the wireless communication employing a plurality of the component carriers. Further, PAPR of the reference signals can be made small because there is no possibility that the identical CAZAC sequence is used among the component carriers when a plurality of the component carriers are employed.

Abstract: A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data to generate at least one data part and a control part; b) generating at least one spreading code to be allocated to the channel, wherein each spreading code is selected on the basis of a data rate of the data part and the control part and spreading codes are selected so that two consecutive pairs of the I and Q data are correspondent to two points located on same point or symmetrical with respect to a zero point on a phase domain; and c) spreading the control part and the data part by using the spreading code, to thereby generate the channel-modulated signal.

Abstract: The present invention relates to the field of communication technology, and provides a method and a device for eliminating interference in a mobile communication system. The method comprises: step 1: re-constructing signal estimation {circumflex over (d)}MAI+ISI of inter-symbol interference and multi-access interference in accordance with an output signal {circumflex over (d)}esb from an equalizer; and step 2: performing interference elimination on the inter-symbol interference and multi-access interference in an output signal êMF from a matched filter in accordance with the signal estimation {circumflex over (d)}MAI+ISI of inter-symbol interference and multi-access interference, to obtain signal estimation {circumflex over (d)}JD+IC with the interference eliminated. According to the present invention, it is able to eliminate the impact of an interference signal and improve the receptivity of a receiver for a useful signal.

Abstract: A method, receiver and program for processing radio signals to identity an n-ray channel condition. The method comprises: receiving signal samples and estimating a plurality of channel taps from the samples; estimating for each of the channel taps a signal power and a disturbance power; filtering the signal power to provide a filtered signal power quantity; filtering the disturbance power to provide a filtered disturbance power quantity; using the filtered power quantities to determine n strongest channel taps; generating first and second comparison parameters using the strongest channel taps and at least one other channel tap; providing a comparison result based on the first and second comparison parameters and a threshold value, and; identifying an n-ray channel condition from the comparison result.

Abstract: In general, the subject matter described in this disclosure can be embodied in methods, systems, and program products for transmitting data over discontiguous portions of radio frequency spectrum. Data that is to be wirelessly transmitted to a remote computing device is received. A first signal that encodes the data across a band of radio frequencies is generated. The first signal is split into multiple signals, each of the multiple signals being associated with a different portion of the band of radio frequencies. Each of the multiple signals is filtered to isolate each respective one of the multiple signals to its associated portion of the band of radio frequencies. At least one of the multiple signals is frequency translated. Each of the multiple signals are combined after the filtering of each of the multiple signals. The second signal is provided for wireless transmission by an antenna.

Abstract: A method of receiving and reassembling non-sequential meta-data information embedded within an original burst carrier signal that receives multiple composite burst carrier signals each with an original burst carrier signal and a meta-carrier signal, wherein the meta-carrier signal occupies at least a portion of a bandwidth of the original burst carrier signal and includes one or more bits of meta-data information of a meta-data message about the original burst carrier signal that is non-contiguous in reference to a temporal order in which the meta-data information is received, detecting a DSSS spreading sequence and extracting the meta-carrier signals from the composite burst carrier signals, determining a phase progression of the meta-carrier signals based on a PRN spreading code, and reassembling the one or more bits of meta-data information from each meta-carrier signal into a sequential order after an entire meta-data message is received and extracted.

Abstract: A home base station receives signal to interference and noise ratio data from at least one access terminal, determines whether a transmission power of the home base station should be adjusted based on the received signal to interference and noise ratio data, and then adaptively adjusts the transmission power of the home base station based on the received signal to interference and noise ratio data.

Abstract: The present disclosure generally relates to techniques to reduce energy consumption in a multiple-input multiple-output (MIMO) system. Some example embodiments may include collecting a set of information associated with one or more of an energy consumption, a network traffic condition, an environmental condition, and/or quality of a communication link associated with the first wireless communication device and/or the MIMO system, configuring the first wireless communication device to operate at a first reduced energy consumption level based on the collected set of information, identifying operation information associated with the first wireless communication device based upon at least the configuration of the first wireless communication device, and transmitting the operation information for reception by the second wireless communication device so that the second wireless communication device can be configured to operate at a second reduced energy consumption level based on the operation information.

Abstract: A method of transmitting a control signal in a wireless communication system includes allocating a first sequence to spread a first control signal in a radio resource, allocating a second sequence to spread a second control signal in the radio resource, selecting one of the first control signal and the second control signal, generating a spread control signal by spreading the selected control signal, and transmitting the spread control signal in the radio resource, wherein the first sequence and the second sequence use different cyclic shifts of a base sequence.

Abstract: A mobile station receives system time information from a source base transceiver station (BTS) in a spread spectrum communication system. The mobile station estimates a distance between the mobile station and the source BTS. The mobile station calculates a propagation delay based on the estimated distance. The mobile station develops a propagation-delay-adjusted time reference based on the system time information and the calculated propagation delay. The mobile station uses the propagation-delay-adjusted time reference to search for a target pseudonoise (PN) offset corresponding to a target BTS in the spread spectrum communication system. The mobile station may be closer to the target BTS than the source BTS.

Abstract: Communications systems and/or methods are disclosed that may be used to convey information by forming, and then using, a plurality of frequency agile baseband waveforms, wherein any two different waveforms of the plurality of frequency agile baseband waveforms comprise an orthogonality therebetween. The systems/methods disclosed can convey information by mapping an information sequence into a baseband waveform sequence that includes waveforms of the plurality of baseband waveforms, and by transmitting the baseband waveform sequence. Such systems and/or methods can provide extreme privacy, cognitive radio capability, robustness to fading and interference, communications performance associated with M-ary orthonormal signaling and/or high multiple-access capacity.

Abstract: A synchronization system for initial setup of phases of local oscillators in a wireless receiver of a communication system characterized by transmission of data packets having a predetermined preamble consisting of M identical sections of L symbols followed by a single section of the same kind, multiplied by ?1, and wherein the wireless receiver is operative to perform decimation in an RF demodulator. The synchronization system includes a twofold correlator, an accumulator, a multiplier, a threshold comparator, a carrier phase former and a clock phase former, and operates at a decimated symbols frequency, and performs not only preamble detection, but also symbols clock phase detection together with carrier phase detection, while enabling the theoretically possible noise immunity.

Abstract: A method for estimating a scrambling code used on an uplink of a WCDMA system. The scrambling code is obtained from a Gold code, sum of a first specific M-sequence of the user and of a second M-sequence known from the receiver. After sampling of the signal received at the chip frequency of the scrambling code, the successive samples are subject to a differential treatment and the sequence of differential values is multiplied by the second M-sequence. The observables thereby obtained are decoded with the aid of a belief propagation iterative decoding. The decoded values then serve to determine the content of the shift register of the generator of the first M-sequence. One then deduces therefrom the Gold code and an estimation of the scrambling code, ?.

Abstract: Disclosed are a method and an apparatus for amplitude modulation of a spread signal that can increase a data transmission rate and frequency use efficiency by loading information on the amplitude of the spread signal used in digital communications. A method for amplitude modulation of a spread signal according to an exemplary embodiment of the present disclosure includes: receiving a first data signal; generating a spread signal by applying a spreading code to the first data signal; receiving a second data signal; and outputting the spread signal at an amplitude corresponding to a value of the second data signal.

Abstract: In a broadband wireless communication system, a spread spectrum signal is intentionally overlapped with an OFDM signal, in a time domain, a frequency domain, or both. The OFDM signal, which inherently has a high spectral efficiency, is used for carrying broadband data or control information. The spread spectrum signal, which is designed to have a high spread gain for overcoming severe interference, is used for facilitating system functions such as initial random access, channel probing, or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.

Abstract: The present invention proposes an LTE eNodeB receiver channel estimation technique that is referred to as reduced complexity minimum mean squared error (MMSE) technique for channel estimation. From the invention's assumptions, estimations and modified calculations, the present invention generates precise channel estimates of RS using the reduced complexity MMSE matrix and previously computed LS channel estimates HLS is as follows: (Formula I) which generates precise channel estimates of RS using the reduced complexity MMSE matrix and previously computed LS channel estimates. As a second aspect of the present invention, it is desired that the SNR be estimated within ?3 dB of the actual channel SNR. As a third aspect of the invention, an adaptive method of data channel interpolation from RS channel is being proposed in this invention.