A high throughput pipeline HARQ scheme of polar codes

In this paper, a high throughput pipeline HARQ scheme of polar codes is proposed as the throughput of conventional schemes are to be promoted. In this scheme, we use a pipeline structure that the current HARQ process may combine the source bits of the current process and the retransmission bits of the incorrectly decoded previous HARQ processes and the source bits of the current process may be retransmitted by the future processes. The throughput is improved while using multiple processes to deal with a single incorrectly decoded process. The simulation results show that, over binary-input additive white Gaussian noise channel, the throughput of the proposed scheme is as well as the existing schemes under the successive cancellation decoding. And the proposed scheme can easily exploit the successive cancellation list decoder to get better throughput than the existing schemes.