Cosine-Modulated Transceivers for TV White Space Cognitive Access  

作　　者：ZHAO Nan PU Fangling XU Xin CHEN Nengcheng 

机构地区：[1]School of Electronic Information, Wuhan University, Wuhan 430079, China [2]State Key Laboratory for Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China

出　　处：《Chinese Journal of Electronics》2012年第2期362-366,共5页电子学报（英文版）

摘　　要：FCC recently issued regulatory rules for the reuse of the underutilized TV white space spectrum without negative impact on digital television broadcasts. Cognitive Radio techniques are of great importance to ac- quire opportunistic access to the TV bands. Since primary user may experience out-of-band power leakage from the secondary signal, Cosine-Modulated Filter Banks are con- sidered as interesting alternatives to traditional OFDMs for spectrum pooling, due to their small sideband power leakage and spectral efficiency. In this paper, we propose a Nearly Perfect Reconstruction CMFB system for CR. A new objective function is provided to control the trade- off between the level of interference caused by secondary transmission to primary users and the spectral efficiency of secondary users. An adaptive linear search optimiza- tion technique is employed for the prototype filter design. Simulation results show a significant enhancement in terms of BER, sideband power rejection, sidelobe radiation and effective throughput compared to conventional OFDM.

关 键 词：Cognitive radio Orthogonal frequencydivision multiplexing （OFDM） Cosine modulated filterbanks （CMFB）~ Effective throughput~ Out-of-band powerleakage. 

分 类 号：TN713[电子电信—电路与系统] P283[天文地球—地图制图学与地理信息工程]