A Joint Coding Method Based on Rateless Coding and Channel Coding at Network Layer

Abstract

Decoding overhead is a standard for measuring whether rateless coding is good or not. The product-code coding of Shifted RSD, a communication transmission scheme, is based on the joint decoding of rateless coding and channel coding at the network layer of feedback information, was proposed in this study in order to reduce the overhead of decoding in rateless coding in the wireless communication. This method combines rateless coding and channel coding at the network layer to decode, which results in multiple packets instead of one recovered by iterative decoding every time during decoding. The decoding is accomplished until all packets are decoded, and the original information of source is recovered. The decoding overhead used for recovering the original information can be reduced due to the increase in the number of packets recovered at a time. Experimental results show that the use of this method combining channel coding with rateless coding to decode requires less decoding overhead than using LT code or RSD code with feedback for decoding, thus improving the decoding capability of the receiving end.