Abstract: Methods and apparatuses are provided that include selecting reference signal (RS) or other tones to utilize in estimating a channel for decoding one or more channels. Where the RS tones are interfered by other base stations, interference cancelation can be performed over the RS tones. Since interference can vary over the tones, interference cancelation can yield RS tones of varying quality. Thus, a quality of each of the RS tones can be determined, and at least a subset of the RS tones can be selected for estimating a channel. Additionally or alternatively, the RS tones can be weighted or otherwise classified for performing channel estimation using the RS tones.

Abstract: A decoding system includes: a modulator which modulates user data by using a modulation rule which converts the user data into a modulation pattern; a regenerator which generates a regenerative signal from a signal obtained by transmitting the user data after modulation through a transmission path; a transmission path decoder which generates signals as generation signals corresponding to the modulation pattern, and calculates k (k is a positive integer) distances between the regenerative signal and the k generation signals in an interval having a length fixedly or dynamically determined; and a demodulator which calculates reliability information for each bit of the user data, and estimates each bit of the user data based on the calculated reliability information. The demodulator calculates likelihood that each bit of the user data is 1 and each bit of the user data is 0 by Formula (A), and calculates the reliability information by Formula (B).

Abstract: Systems and methods may be implemented with MIMO antenna architectures (e.g., such as 2×2, 3×3, 4×4, etc.) of a given mobile information handling system to selectively use dynamic MIMO configuration and/or reconfiguration to select only a subset of the available multiple antenna elements or all of the available multiple antenna elements for receive and/or transmit operation based on the interference characteristics of the given mobile information handling system and/or based on the current radio frequency (RF) band currently being used for wireless communications by the mobile information handling system.

Abstract: A system and method are provided for extracting and demodulating one or more channels in a radio signal. The method includes receiving a first radio signal using a radio frequency front end, translating a first band of frequencies of the first radio signal to a second band of frequencies to generate a second radio signal, digitizing the second radio signal to generate a digital signal, extracting one or more additional band of frequencies of the digital signal, each additional band of frequencies corresponding to a channel, and demodulating one or more channels to generate a respective demodulated signal. In another aspect, a system and method are provided for modulating and combining one or more channels into a radio signal.

Abstract: A method and an apparatus are provided. The apparatus may includes a clock recovery circuit having a comparator that provides a comparison signal indicating whether an input signal matches a level-latched instance of the input signal, a first set-reset latch that provides a filtered version of the comparison signal, where the first set-reset latch is set by a first-occurring active transition of the comparison signal and is unaffected by further transitions of the comparison signal that occur during a predefined period of time, delay circuitry that receives the filtered version of the comparison signal and outputs a first pulse on a first clock signal, and a second set-reset latch configured to provide a second pulse on an output clock signal when the first pulse is present on the first clock signal and the comparison signal indicates that the level-latched instance of the input signal does not match the input signal.

Abstract: A intelligent backhaul radio is disclosed, which can operate by zero division duplexing for use in PTP or PMP topologies, providing for significant spectrum usage benefits among other benefits. Specific system architectures and structures to enable active cancellation of multiple transmit signals at multiple receivers within a MIMO radio are disclosed. Further disclosed aspects include the adaptive optimization of cancellation parameters or coefficients.

Abstract: An improved clock data recovery circuit is provided which provides lower bit error rates and faster locking times. In an embodiment, the circuit includes a voter having one or more voter inputs. The voter may generate up votes indicative of a recovered clock having a negative phase offset relative to a given voter input, or down votes indicative of the recovered clock having a positive phase offset. The circuit may include a comparator configured to output a phase adjustment signal and a tie signal. The circuit may further include an M-depth shift register and a multiplexer configured to select either the phase adjustment signal or an output from the shift register as a multiplexer output. The circuit may further include a flip-flop that generates a phase adjustment output signal. The shift register may receive the phase adjustment output signal at a data input of the shift register.

Abstract: Various embodiments are disclosed for providing timing tracking loops in a communication system. A communication system includes a delay locked loop (DLL) comprising a maximum region detector configured to identify a target channel profile comprising at least a portion of the multipath signals based on the timing information, the maximum region detector further configured to apply a weight vector to each channel tap in the target channel profile and determine a tap with a maximum power level relative to remaining channel taps in the channel profile. The system further comprises a window timing loop (WTL) adjuster configured to track a position of a channel estimation window (CEW) within an observation window corresponding to the maximum channel energy level, where the maximum channel energy level corresponds to the sum of the energy of all the taps for a given window.

Abstract: A pre-distortion coefficient corresponding to a transmit power currently set by a transmitting end is adjusted. A signal received quality report which is obtained according to the pre-distortion coefficient before adjustment is analyzed and fed back by a receiving end and a signal received quality report that is obtained according to the pre-distortion coefficient after adjustment and fed back by the receiving end. The analysis determines a variation situation of signal received quality of the receiving end. If the signal received quality of the receiving end becomes better, the pre-distortion coefficient after adjustment is used as the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end. The process then returns to the step of adjusting a pre-distortion coefficient corresponding to a transmit power currently set by a transmitting end.

Abstract: Example embodiments presented herein are directed towards a system, and corresponding method, for interference suppression of wireless communication signals. The method may comprise embedding a differential phase tracking signal (e.g., a zero amplitude differential phase tracking signal) in a transmitted wireless communication signal. Thereafter, a differential phase may be measured between the embedded transmitted wireless communication signal and a wireless reference signal. This differential phase measurement may be utilized in the suppression of interference in the wireless communication signal.

Abstract: Embodiments related to burst mode amplifying are described and depicted.

Abstract: A system for correction of the phase error in in-phase and quadrature signals may include a first signal and a second signal. The system includes a first circuit and a second circuit, each circuit configured for receiving a square-wave input signal and supplying a respective square-wave output signal. The output signal is delayed with respect to the input signal and each circuit is configured in such a way that the propagation delay of a rising edge and the propagation delay of a falling edge between the input signal and the output signal are configurable. The first circuit is configured for receiving the first signal, and the second circuit is configured for receiving the second signal.

Abstract: Methods and devices for LTE cell search with large frequency offset are disclosed. In one embodiment of the invention, a UE divides the received signals into multiple frequency bins and transforms the signals into frequency domain through FFT. The UE performs correlating measures between the received signals and reference signals. The UE then performs an adaptive multi-try based peak selection such that the number of candidate is reduced. In one embodiment of the invention, the multi-try number is adaptively adjusted based on the channel condition. In one embodiment of the invention, the threshold of the peak selection is adaptively adjusted. In other embodiments of the invention, the UE performs non-coherent accumulation and selects a predefined number of coarse bin candidates. The number of non-coherent accumulation is adaptively adjusted. In another embodiment of the invention, the UE performs fractional frequency offset estimation and selects a fine bin candidate.

Abstract: A modulator generates a modulation signal from an input signal by, and a serial-parallel converter generates a subcarrier modulation signal from the modulation signal. A shifter shifts a predetermined data series to generate a shift sequence. Two IFFT units perform an IFFT on data sent thereto to generate first data and second data. An operator generates baseband signals from at least one of the sum of the first data and the second data and the difference therebetween. The foregoing processing is repeated with a predetermined number of times to shift the predetermined data series being changed. A PAPR determiner sends the baseband signal matching with a predetermined reference for determining a transmission signal to a transmitter. The transmitter generates a transmission signal from the baseband signal, and transmits the transmission signal to another communication apparatus via an antenna.

Abstract: Method and arrangement in a serving base station for determining a binary value of information data received from a user equipment, by using a supportive likelihood value received from a supporting base station. The user equipment transmits information data to be received both by the serving base station and the supporting base station base station. The method comprises: decoding information data bits received from the user equipment into a first likelihood value, without determining a binary value for each bit of the information data, a supportive likelihood value of the information data bits transmitted from the user equipment is received from the supporting base station, which supportive likelihood value is based on a decoding of the information data bits performed in the supporting base station. The first likelihood value of the decoded information bits is combined with the received supportive likelihood value of the decoded information bits.

Abstract: A transmitter and receiver for performing a signal select algorithm are provided. A transmitter for providing a signal on a line to be located includes at least one direct digital synthesizer, the direct digital synthesizer producing two component frequencies in response to an input square wave signal; and a feedback loop providing the input square wave.

Abstract: Devices and methods for reducing and/or substantially preventing nonlinearities and discontinuities during the translation stage from an I/Q signal into a polar coordinate OFDM signal are provided. By way of example, a method includes receiving an incoming data signal via a processor of a transmitter. The method further includes computing one or more roots of a first function representing a phase component of the data signal, computing a second function representing the phase component, and deriving one or more characteristics of the phase component based on the second function. The method further includes adjusting one of the one or more characteristics in a second domain to establish a substantially finite bandwidth of the phase component.

Abstract: A method for sending and receiving a signal is disclosed, and a corresponding device and system. The method includes performing constellation mapping on a data stream to obtain a mapped signal, and performing pre-filtering on the mapped signal to convert the mapped signal into a narrowband signal filtered signal. The pre-filtering is finite impulse response filtering. A bandwidth of the narrowband signal filtered signal is less than bandwidth of the mapped signal, and the narrowband signal filtered signal is a baud rate signal. The method also includes performing waveform forming according to the narrowband signal filtered signal to obtain a shaped signal, and performing digital-to-analog conversion on the shaped signal to convert a shaped second signal into an analog signal, and sending the analog signal.

Abstract: A method and apparatus for detecting signals. According to an embodiment, energy waves are received at a first receiver system and a second receiver system. The first receiver system generates first information using the energy waves received at the first receiver system. The first receiver system receives second information generated using the energy waves received at the second receiver system from the second receiver system. The first receiver system identifies desired information about a repetitive portion of a signal carried in the energy waves received at the first receiver system using the first information and the second information.

Abstract: The present invention provides a transmission method which generates and sends a transmission signal generated from a multiplexing OFDM signal or a multiplexing wavelet-OFDM signal employing a multiplexing-spread chip sequence in which a chip of a code sequence for spread and a code sequence for combination, and a chip of a code sequence for localization are multiplied and multiplexed, and a receiving method which makes a high SN ratio improvement rate possible by converting the received signal to a frequency domain to acquire the multiplexing-spread chip sequence and by performing de-spreading and localizing processing to detect a localized pulse. According to the data transmission using the transmission and receiving method, data is mapped into a code sequence, and the receiving side can detect the data as the kind of code sequence, the shift time of a localized pulse and the polarity at a high SN ratio improvement rate.