BER Performance of Soft Decision Modulations Based on PCSS System

作     者：Ming-Duo Liu Li-Li Guo Hong-Lei Li 

作者机构：College of Information and Communication EngineeringHarbin Engineering University The 61769 Unit of PLA 

出 版 物：《Journal of Harbin Institute of Technology(New Series)》 (哈尔滨工业大学学报（英文版）)

年 卷 期：2013年第20卷第2期

页      面：22-26页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 081001[工学-通信与信息系统] 

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.61271263) 

主　　题：parallel combinatory spread spectrum system soft decision modulations correlation of superposition PN sequences 

摘      要：Recently,soft decision modulations become the highlight of parallel combinatory spread spectrum ( PCSS) system. Existing soft decision BPSK and APK modulations are given and compared in the thesis. In order to apply soft decision QPSK modulation based on PCSS system,the correlation of superposition PN sequences is discussed. A weighted summation algorithm is adopted in QPSK demodulation to recover the whole orthogonal correlation of the superposition sequences; meanwhile the bit error rate of weighting soft decision QPSK modulation is simulated. The simulation results show that the bit error rate performance of proposed soft decision QPSK modulation based on PCSS system is better than that of hard decision modulation. The method proposed can be widely adopted in engineering application.