采用QPSK调制的导频辅助CDMA系统的分析和优化
ANALYSIS AND OPTIMIZATION OF PILOT-CHANNEL-ASSISTED QPSK FOR DS-CDMA SYSTEMS
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摘要: 该文分析了有导频辅助的采用QPSK调制方式的直扩(DS-CDMA)系统,计算出由于信道估测的不精确而造成的系统性能的损失,并由此得到了数据信道功率和导频信道功率的最佳比及相应的系统误码率。最后给出仿真结果。Abstract: In this paper, the pilot-channel-assisted QPSK in direct-sequence code-division multiple-access (DS-CDMA) system is investigated. The performance loss due to imperfect channel estimation is calculated. Then the data-to-pilot channel power ratio is optimized analytically and the probability is presented. Finally, simulation results are given.
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TIA/EIA/CDMA2000, The CDMA 2000 ITU-R Candidate Submission, August, 1998.[2]F. Ling.[J].Coherent detection with reference-symbol based channel estimation for direct sequence CDMA uplink communications, Proc. VTC93, NJ, USA.1993,:-[3]A. Papoulis, Probability, Random Variables, and Stochastic Processes, New York, McGraw-Hill,1965, Chapter 5.[4]John G Proakis,Digital Communications,3rd,北京,电子工业出版社,Appendix C. -
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