Low-Complexity Spectrum Shaping for OFDM-Based Cognitive Radio Systems

被引：15
|
作者：
Zhou, Xiangwei [1 ]
Li, Geoffrey Ye [1 ]
Sun, Guolin [2 ]
机构：
[1] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA
[2] Huawei Technol Sweden AB, Kista, Sweden
来源：
IEEE SIGNAL PROCESSING LETTERS | 2012年 / 19卷 / 10期
基金：
美国国家科学基金会;
关键词：
Cognitive radio; OFDM; precoding; spectrum shaping;
D O I：
10.1109/LSP.2012.2211013
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Orthogonal frequency-division multiplexing (OFDM) is an ideal transmission technique for dynamic spectrum access in cognitive radio (CR) systems. In this letter, we propose low-complexity spectrum shaping to enable fast decaying of power spectral sidelobes and enhance spectral compactness for OFDM-based CR systems. Based on a basic scheme mapping antipodal symbol pairs onto adjacent subcarriers, we present two modified schemes to further balance sidelobe suppression and system throughput. Compared with existing spectrum shaping schemes, ours exhibit their advantage of both simplicity and flexibility.
引用
收藏
页码：667 / 670
页数：4
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