A Belief Propagation (BP) equalization method and apparatus, a communication device and a storage medium are disclosed. The method may include: splitting a received signal Y.sub.c, a channel estimation H.sub.c and a symbol estimation X.sub.c into real parts and imaginary parts to obtain a received signal matrix Y, a channel estimation matrix H and a symbol estimation matrix X (S101); performing orthogonal triangular (QR) decomposition on the channel estimation matrix H to obtain an equivalent received signal Y.sub.bp, an equivalent channel R and a noise power σ.sup.2 (S102); and performing iteration based on the equivalent received signal Y.sub.bp, the equivalent channel R and the noise power σ.sup.2 to obtain a position probability of per stream symbol (S103).

This application provides an error correction method and apparatus, relates to the field of communications technologies, so as to reduce a bit error rate of a decision feedback equalizer (DFE) and improve equalization performance. The method includes: obtaining a decision signal of a DFE; obtaining at least one of an input signal, an equalized output signal, and a difference of the DFE, where the difference is a difference between a level value of the decision signal and a level value of the equalized output signal; determining a symbol location of an end of burst error of the decision signal based on detection of at least one of the decision signal, the equalized output signal, and the difference; and when the symbol location is detected, performing error correction on the decision signal based on the at least one of the input signal, the equalized output signal, and the difference.

A reception device according to the present invention includes: a signal division unit; a maximum-likelihood point search unit; a maximum-likelihood point search unit; a replica-vector calculation unit; a replica-vector calculation unit; and a likelihood calculation unit. Wherein, the signal division unit divides a reception signal including a plurality of multiplexed signals respectively into a real component and an imaginary component; the maximum-likelihood point search unit narrows down candidate signal points; the maximum-likelihood point search unit to narrows down candidate signal points; the a replica-vector calculation unit calculates a first replica vector by using the first candidate signal point; the replica-vector calculation unit calculates a second replica vector by using the second candidate signal point; and the likelihood calculation unit calculates a likelihood of the modulation signal by using the first replica vector and the second replica vector.

This application provides an error correction method, relates to the field of communications technologies, so as to reduce a bit error rate of a DFE and improve equalization performance. The method includes: obtaining a decision signal of a decision feedback equalizer DFE; obtaining at least one of an input signal, an equalized output signal, and a difference of the DFE, where the difference is a difference between a level value of the decision signal and a level value of the equalized output signal; determining a symbol location of an end of burst error of the decision signal based on detection of at least one of the decision signal, the equalized output signal, and the difference; and when the symbol location is detected, performing error correction on the decision signal based on the at least one of the input signal, the equalized output signal, and the difference.

A disclosed DFE selection element reduces the degree of unrolling that might otherwise be required. In one illustrative embodiment of a method for converting a receive signal from a communication channel into a sequence of symbol decisions, the method includes, for each sampling interval: (a) generating a set of tentative symbol decisions each having a thermometer-coded representation with a least significant bit and a most significant bit; (b) providing each least significant bit as a thermometer-coded input to a first multiplexer; (c) providing each most significant bit as a thermometer-coded input to a second multiplexer; (d) applying a thermometer-coded representation of a preceding output symbol decision as selection inputs to the first and second multiplexers; and (e) capturing a current output symbol decision having a thermometer-coded representation that includes outputs of the first and second multiplexer.

Apparatus and methods for performing symbol detection on a plurality of mutually interfering information streams transmitted in a wireless communication system are disclosed. The apparatus comprises a detector configured to receive an input signal comprising a plurality of mutually interfering information streams, and to detect a transmitted symbol for one of the plurality of mutually interfering information streams by searching for a vector solution to an optimization problem, and a detection evaluation module configured to classify the detected symbol as reliable or unreliable, and/or to determine whether current system conditions permit reliable symbol detection and to take a predetermined action to improve the detection reliability according to a result of the determination. In some embodiments a decoding algorithm is then applied to the plurality of detected symbols to recover information from said one of the mutually interfering information streams.

Receivers, methods, and cores, can provide decision feedback equalization with efficient burst error correction. An illustrative receiver includes: a decision feedback equalizer that derives symbol decisions from a receive signal; a subtractor that determines an equalization error for each said symbol decision; and a post-processor that operates on the symbol decisions and equalization error to detect and correct symbol decision errors. An illustrative receiving method includes: using a decision feedback equalizer to derive symbol decisions from a filtered receive signal; determining an equalization error for each said symbol decision; and processing the symbol decisions and equalization error to detect and correct symbol decision errors. An illustrative semiconductor intellectual property core generates circuitry for implementing a receiving and method as described above.

A Belief Propagation (BP) equalization method and apparatus, a communication device and a storage medium are disclosed. The method may include: splitting a received signal Y.sub.c, a channel estimation H.sub.c and a symbol estimation X.sub.c into real parts and imaginary parts to obtain a received signal matrix Y, a channel estimation matrix H and a symbol estimation matrix X (S101); performing orthogonal triangular (QR) decomposition on the channel estimation matrix H to obtain an equivalent received signal Y.sub.bp, an equivalent channel R and a noise power ?.sup.2 (S102); and performing iteration based on the equivalent received signal Y.sub.bp, the equivalent channel R and the noise power ?.sup.2 to obtain a position probability of per stream symbol (S103).

Apparatus and methods for performing symbol detection on a plurality of mutually interfering information streams transmitted in a wireless communication system are disclosed. The apparatus comprises a detector configured to receive an input signal comprising a plurality of mutually interfering information streams, and to detect a transmitted symbol for one of the plurality of mutually interfering information streams by searching for a vector solution to an optimization problem, and a detection evaluation module configured to classify the detected symbol as reliable or unreliable, and/or to determine whether current system conditions permit reliable symbol detection and to take a predetermined action to improve the detection reliability according to a result of the determination. In some embodiments a decoding algorithm is then applied to the plurality of detected symbols to recover information from said one of the mutually interfering information streams.

Apparatus and methods for performing symbol detection on a plurality of mutually interfering information streams transmitted in a wireless communication system are disclosed. The apparatus comprises a detector configured to receive an input signal comprising a plurality of mutually interfering information streams, and to detect a transmitted symbol for one of the plurality of mutually interfering information streams by searching for a vector solution to an optimization problem, and a detection evaluation module configured to classify the detected symbol as reliable or unreliable, and/or to determine whether current system conditions permit reliable symbol detection and to take a predetermined action to improve the detection reliability according to a result of the determination. In some embodiments a decoding algorithm is then applied to the plurality of detected symbols to recover information from said one of the mutually interfering information streams.