摘要: |
本文讨论了直接序列-码分多址(DS-CDMA)系统中的几种多速率方案,分别分析了它们在加性白高斯噪声和多径瑞利衰落条件下的性能。对这几种方案在瑞利衰落信道下的性能做了仿真,结果表明,多扩频增益方案与多信道方案性能接近,多调制方案在信息速率较高时,性能不如其它方案。 |
关键词: DS-CDMA 多址通信 码分多址 多速率 多扩频增益 |
DOI:10.3969/j.issn.1001-893X. |
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基金项目: |
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Analysis and Comparison of Multirate Schemes in CDMA System |
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Abstract: |
Several multirate schemes in DS-CDMA system are discussed in this paper,both AWGN and multipath Rayleigh fading channels are considered.The simulated results show that the multi processing-gain scheme and the multi-channel scheme have almost the same performance,the performance of multi-modulation scheme is much worse than that of the other schemes for the users with high data rates. |
Key words: Digital Communication,CDMA,Multirate, Multi Processing-gain,Multichannel,Multi-modulation, |