Design and Implementation of an Improved Error Correcting Code for 5G Communication System

摘要

Channel coding, which means adding a redundancy to information in order to minimize a bit error rate is one of key technologies in development of each generation of mobile systems. Recently, Low-Density Parity-Check (LDPC) Code has been selected to provide channel coding for 5G communication systems due to its high performance that approaches closely Shannon's limit, and its low complexity. However, there is still some work that is related to throughput, flexibility, and complexity of LDPC codes needs to be considered to meet all the 5G requirements. In this paper, an improved code of high throughput and flexibility was proposed. Here, a code is flexible if it supports a large number of coding rates and block lengths. In addition, the proposed code can be encoded and decoded with low computational and implementation complexities. The encoder and decoder can be implemented based on IEEE WiMAX standards, so the generated codes can be compared to the standard WiMAX LDPC codes. Theoretical calculations show that the proposed codes achieve significant improvements in throughput, latency, and computational and implementation complexity. The simulation employed WiMAX 802.16e standard and a fixed clock frequency of 500 MHz. The throughput ranged from 372 Mbps for rate 1/2 codes to 915 Mbps for rate 5/6 codes. An increasing of 1.4-2.2 times was obtained compared to the standard LDPC codes.