A communications apparatus to receive a composite signal including a desired signal and interferer signals, where the desired signal may include desired symbols and the interferer signals may include interferer symbols. The system may include N frameworks, each framework may include a detector to partition the desired symbols and the interferer symbols based on an interference severity into a dominant group and a non-dominant group, and to generate A Posteriori Probabilities (APP) of the desired symbols and the interferer symbols. The detector of each of the N frameworks generates the APP based on a feedback of a priori probabilities from each of the N frameworks.

A communications apparatus to receive a composite signal including a desired signal and interferer signals, where the desired signal may include desired symbols and the interferer signals may include interferer symbols. The system may include N frameworks, each framework may include a detector to partition the desired symbols and the interferer symbols based on an interference severity into a dominant group and a non-dominant group, and to generate A Posteriori Probabilities (APP) of the desired symbols and the interferer symbols. The detector of each of the N frameworks generates the APP based on a feedback of a priori probabilities from each of the N frameworks.

This application discloses a soft value extraction method and device applicable to an OvXDM system, and the OvXDM system. In the method, waveform coding is performed on all symbols in a hard value sequence, to generate a predictive value after overlapped coding; the symbols in the hard value sequence are reversed one by one, and overlapped coding is performed on each reversed symbol and associated symbols before and after the reversed symbol, to generate a predictive value of the reversed symbol; and for each symbol in the hard value sequence, a soft value of the current symbol is calculated based on A(.sup.+1.sup.1), where A is a coefficient related to a channel type, .sup.+1=y.sub.rxy.sup.+1, and .sup.1=y.sub.rxy.sup.1.sup.2; if y.sup.+1 is a predictive value of the symbol obtained after overlapped coding and before reversing, y.sup.1 is a predictive value of the symbol obtained after overlapped coding and reversing; and y.sub.rx is a received signal sequence.

A method for determining a remote radio device and a distributed AP are provided. The method includes: A baseband device determines parameters of uplink signals received by N remote radio devices, where N is a natural number greater than 1. The baseband device selects, based on the parameters, at least one remote radio device from the N remote radio devices as a remote radio device in a target set. The baseband device performs decoding based on an uplink signal received by the remote radio device in the target set, or positions a terminal device based on an uplink signal received by the remote radio device in the target set.

The present disclosure provides for distortion cancellation by receiving a collided signal, the collided signal comprising a plurality of signals that each carry a corresponding packet; for a first signal of the plurality of signals that includes a first packet: amplifying and digitizing the collided signal into a first digital signal at a first gain; and decoding the first packet from the first digital signal; for each signal of the plurality of signals other than the first signal, carrying a given packet: estimating a given linear interference component and a given nonlinear interference component of one or more prior packets to the given packet on the collided signal; removing the given linear interference component and the given nonlinear interference component from the collided signal to produce a given de-interfered signal; and decoding the given packet of the plurality of packets from the given de-interfered signal.

A wireless device includes first and second analog radio modules, first and second medium access control modules configured to control access to a digital network via the first and second analog radio modules, respectively, first and second baseband modules configured to convert between analog signals at the first and second analog radio modules, respectively, and digital signals at the first and second medium access control module, respectively, and circuitry configured to selectably coordinate the first and second medium access control modules to create a single-channel configuration for use by the wireless device to transmit and receive radio signals over a wireless interface, by setting the first and second analog radio modules to operate on a common frequency, and by commonly controlling the first and second baseband modules to convert common packets between analog and digital signals transmitted to or received from respective medium access control modules.

In some embodiments, a bandwidth constrained equalized transport (BCET) communication system comprises a transmitter that transmits a signal, a communication channel that transports the signal, and a receiver that receives the signal. The transmitter can comprise a pulse-shaping filter that intentionally introduces memory into the signal, and an error control code encoder that is a low-density parity-check (LDPC) error control code encoder. The error control encoder comprises code that is optimized based on the intentionally introduced memory into the signal, a code rate, a signal-to-noise ratio, and an equalizer structure in the receiver. In some embodiments, the communication system is bandwidth constrained, and the transmitted signal comprises an information rate that is higher than for an equivalent system without intentional introduction of the memory at the transmitter.

A device for determining a received signal as minimum values of a set of values, the device comprising a processor configured to: load a first set of values in a register; identify a maximum value of the first set of values and a minimum value of the first set of values; in the register, replace the maximum value by a value of a second set of values and simultaneously replace the minimum value by a new value, calculated based on the minimum value, to receive an updated first set of values; and repeat previous steps until all values of the updated first set of values are replaced by values of the second set of values.

In some embodiments, a bandwidth constrained equalized transport (BCET) communication system comprises a transmitter that transmits a signal, a communication channel that transports the signal, and a receiver that receives the signal. The transmitter can comprise a pulse-shaping filter that intentionally introduces memory into the signal, and an error control code encoder that is a low-density parity-check (LDPC) error control code encoder. The error control encoder comprises code that is optimized based on the intentionally introduced memory into the signal, a code rate, a signal-to-noise ratio, and an equalizer structure in the receiver. In some embodiments, the communication system is bandwidth constrained, and the transmitted signal comprises an information rate that is higher than for an equivalent system without intentional introduction of the memory at the transmitter.

The present disclosure provides for distortion cancelled by receiving a collided signal comprising first and second signals carrying respective first and second packets; digitizing the collided signal into a first digital signal and decoding the first packet therefrom; calculating a digital linear interference component of the first packet on the second from an estimated signal re-encoding the decoded first packet; synthesizing an analog linear interference component from the digital linear interference component; determining a digital nonlinear interference component of the first packet on the second from the first digital signal; amplifying the collided signal to produce a second amplified signal; removing the analog linear interference component from the second amplified signal to produce a partially de-interfered signal; removing the digital nonlinear interference component from the partially de-interfered signal to produce a de-interfered signal; and decoding the second packet from the de-interfered signal.