A Novel Half-overlap FMT System Using CIC Filter in Cognitive Radio
Cognitive radio (CR) is a dynamic spectrum access technology as a solution to spectrum under-utilization problem in some licensed bands. Operating over an exceedingly wide spectrum, CR systems usually adopt multicarrier modulation to implement flexible channelization. Due to small sideband power leakage, filter bank multicarrier (FBMC) techniques are considered as interesting alternatives to traditional OFDM for spectrum pooling CR. Non-overlap and half-overlap Filtered Multi-Tone (FMT) is two kinds of FBMC system. Half-overlap FMT has higher spectrum utilization than non-overlap FMT but introduces inter-carrier interference (ICI) due to loss of orthogonality which may degrade system performance. In this paper, an improved Half-overlap FMT (CICFB-FMT) system with orthogonal sub-carriers will be proposed and a comparison on anti-ICI performance when frequency offset occurs in OFDM, CICFB-FMT and Half-overlapped FMT will be conducted. Both the simulation and measure results show that the proposed modulation technique has the best anti-ICI performance and is a good candidate for physical layer of CR.
cognitive radio filter bank CIC filter Halfoverlap FMT sidelobe ICI
Xugang Liu Hao Liu
National Key Laboratory of Science and Technology on Communications UESTC Chengdu, China
国际会议
北京
英文
1-5
2010-06-25（万方平台首次上网日期，不代表论文的发表时间）