Polar coded modulation method for constellation forming

The invention discloses a Polar coding modulation method for constellation forming. The method comprises the following steps: processing each symbol to obtain an expected sending probability of each bit in all symbols; demapping the expected sending probability of each bit in all the obtained symbols to obtain the expected sending probability of each corresponding bit in the code word which does not pass through the interleaver; and a new log-likelihood ratio obtained through construction and corresponding processing is decoded through de-interleaving and a Polar decoder, so that the overall forming can neglect the limitation on a natural sequence, the sending probability of the actually transmitted symbol tends to an expected probability, and the performance of the bit error rate is improved. 本发明公开了一种面向星座成形的Polar编码调制方法，本发明通过对每个符号进行处理得到所有符号中每个比特的预期发送概率；对得到的所有符号中每个比特的预期发送概率进行解映射得到未经过交织器的码字中对应的每个比特的预期发送概率；再通过将构造和相应处理得到新的对数似然比经过解交织和Polar译码器进行译码，使得整体的成形可以忽视对自然顺序的限制，使得实际传输的符号的发送概率趋于预期概率，提升误码率的性能。