Transmission Control for Fast Recovery of Rateless Codes

Abstract

Abstract-Luby Transform (LT) codes are more important in communication applications due to the characteristics of fast encoding/decoding process, and low complexity. However, LT codes are optimal only when the number of input symbols is close to infinity. Some researches modified the degree distribution of LT codes to make LT codes suitable for short symbol length. In this article, we propose an optimal coding algorithm to recover all of the encoded symbols for LT codes quickly. The proposed algorithm observes the coding status of each client and increases the coding performance by changing the transmission sequence of low-degree and high-degree encoding packets. Simulation results show that the resulting decoding overhead of our algorithm are lower than the traditional LT codes, and our algorithm is very appropriate to server various clients in the broadcasting channel environment.

Rateless Space-Time Block Codes for 5G Wireless Communication Systems

“…However, these processes will sustain additional overhead that includes data retransmission and adding redundancy into the original data. They cannot correctly decode the source data when the packet loss rate is high [3]. Therefore, it is of significant interest to design a simple channel coding with a flexible code rate and capacity approaching behavior to achieve robust and reliable transmission over universal lossy channels.…”