Multi-rate schemes in DS/CDMA systems
Multi-rate schemes in DS/CDMA systems
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DS/CDMA 系统中的多速率方案
DOI：
10.1109/vetec.1995.505019
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
A. Svensson
中科院分区：
文献类型：
--
作者：
T. Ottosson;A. Svensson
研究了直接序列码分多址（DS/CDMA）系统中支持多种数据速率的不同调制方案，重点研究了如何支持个人通信业务。同时考虑了AWGN信道和多径瑞利衰落信道。结果表明，多处理增益方案与多通道方案具有基本相同的性能。然而，多信道方案具有抗近距离、编码设计简单、多用户接收机结构简单等优点。缺点是需要线性放大器。多调制方案也是可行的，但对于具有高数据速率的用户来说，性能明显差于其他方案。
Different modulation schemes supporting multiple data rates in a direct sequence code division multiple access (DS/CDMA) system are studied, focusing on how to support personal communication services. Both AWGN and multipath Rayleigh fading channels are considered. It is shown that the multi processing-gain scheme and the multi-channel scheme have almost the same performance. However, the multi-channel scheme has some advantages due to near-far resistance, easier code design and easier multi-user receiver construction. The drawback though, is the need for linear amplifiers. A multi-modulation scheme is also possible, but the performance for the users with the high data rates is significantly worse than for the other schemes.