Partially decoded polarized serial cancellation decoding circuit and method thereof

Abstract

The invention discloses a partially decoded polarized serial cancellation decoding circuit and method thereof. The circuit comprises a binary phase shift keying modulation module, a likelihood ratio computing module, and a bit hard decision module; the binary phase shift keying modulation module produces initial likelihood according to a receiving sequence; the likelihood computing module comprises a formula as shown in description computation stages in order recursion connection; the bit hard decision module performs symbol judgment according to a pair of likelihoods output at the last stageto output a decoding result. The circuit disclosed by the invention only performs the paired decoding on at least one information bit of the adjacent channel, the likelihood computing unit amount canbe effectively reduced when the decoding period is shortened, and the starting frequency is lowered, and then the overall power consumption of a decoder is lowered; and finally an aim of quickly lowering the power consumption of the overall decoder can be achieved.

Description

technical field [0001] The invention belongs to the technical field of network communication, and in particular relates to a partial decoding polar code serial cancellation decoding circuit and method. Background technique [0002] Polar code (Polar Code) is the latest coding method in the coding field, and it is also the most concerned coding method. Its proposal is a major breakthrough in the coding field, and it is proposed based on the channel polarization theory. Polar codes have a deterministic construction method and are the only known channel coding method that can be rigorously proven to "reach" the channel capacity. Compared with other coding methods, the lower complexity and the error correction performance that can reach the Shannon limit will make polar codes an important candidate for error correction schemes in the next generation of digital communication and storage fields. [0003] In the prior art, the decoding speed and power consumption of the polar code...

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Problems solved by technology

The decoding circuit of "A Stage-Reduced Low-Latency Successive Cancellation Decoder for Polar Codes" published by Liu Xing, Zhang Chuan and others at the IEEE international conference DSP (DigitalSignal Processing) in 2013 is relatively simple in the current serial offset decoding algorithm And fast circuits, in this article, the reduced-order processing of the likelihood ratio calculation is proposed, which greatly improves the decoding delay, reduces the decoding cycle from the traditional 2N-2 to N-2, and the data throughput rate doubled; but there are still the following problems: (1) the likelihood ratio calculation unit has redundant calculation problems, and the calculation amount is too large, resulting in increased power consumption; (2) the likelihood ratio reduction order serial offset decoding algorithm There is still room for reduction in the decoding cycle, and cycle redundancy reduces the data throughput rate

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