OFDM-CDMA with peak power reduction based on the spreading sequences
OFDM-CDMA with peak power reduction based on the spreading sequences
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基于扩频序列的具有峰值功率降低功能的 OFDM-CDMA
DOI：
10.1109/icc.1998.683035
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
H. Imai
中科院分区：
文献类型：
--
作者：
H. Ochiai;H. Imai
我们根据发射信号的峰均功率比 (PAPR) 讨论了下行 OFDM-CDMA 正交序列的构造方法。 PAPR 特性基于两个正交序列集进行研究：Walsh-Hadamard 序列和互补序列。结果表明，对于相对较少的活跃用户，Walsh-Hadamard 序列往往具有非常大的 PAPR，而互补序列的 PAPR 保持稳定在其理论值附近。还为 OFDM-CDMA 提出了一种简单但有效的峰值降低方案。
We discuss the construction method of orthogonal sequences for downlink OFDM-CDMA, in terms of the peak to average power ratio (PAPR) of the transmitted signals. The PAPR property is studied based on two orthogonal sets of sequences: Walsh-Hadamard and complementary sequences. It is shown that for relatively few active users, Walsh-Hadamard sequences tend to have very large PAPR, while the PAPR of complementary sequences remains stable near its theoretical value. A simple but effective peak reduction scheme is also proposed for OFDM-CDMA.