Polar code BP decoding method with iterative early-stopping mechanism

The invention discloses a polar code BP decoding method with an iterative early-stopping mechanism. The polar code BP decoding method belongs to the field of channel coding technology. According to the polar code BP decoding method, a BP decoding algorithm is used for decoding the polar coding information. The polar coding information is obtained through performing CRC coding and polar coding on original information. In each iteration process for decoding the polar coding information by means of the BP decoding algorithm, CRC verification is performed on the decoding result which is obtained through current iteration process. If verification is passed, iteration is stopped and the decoding result which is obtained through current iteration process is output; and otherwise, iteration is performed continuously until a preset maximal number of iterations is reached. Compared with the prior art, the polar code BP decoding method has advantages of effectively reducing computing difficulty and decoding time delay in decoding and furthermore facilitating hardware realization.