全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

MBOFDM认知无线电子载波编码技术

DOI: 10.13190/jbupt.201006.33.zhaochl, PP. 33-37

Keywords: 正交频分复用,频谱凹槽,认知无线电

Full-Text   Cite this paper   Add to My Lib

Abstract:

针对基于正交频分复用(OFDM)信号的认知无线电系统存在的子载波间干扰问题,提出了一种加深OFDM信号频谱凹槽的编码方法.该方法通过在相邻2个子载波上传输相同的信息,并将这2个子载波上传输的数据乘以一定的权值使其频谱凹槽处的边带能量相互抵消,达到降低特定频带功率的目的.理论分析和计算机仿真结果表明,本文方法不仅能加深频谱凹槽的深度,还具有很好的抗噪声性能.

References

[1]  Weiss T, Jondral F. Spectrum pooling: an innovative strategy for the enhancement of spectrum efficiency [J]. IEEE Communications Magazine, 2004, 42(3): 8-14.
[2]  Weiss T, Hillenbrand J, Krohn A, et al. Mutual interference in OFDM-based spectrum pooling systems //VTC2004-Spring. Italy: IEEE Press, 2004: 1873-1877.
[3]  Yamaguchi H. Active interference cancellation technique for MB-OFDM cognitive radio//EUMC 2004. Japan: Horizon House Publishing Ltd, 2004: 1105-1108.
[4]  Pagadarai S, Rajbanshi R, Wyglinski A M. Sidelobe suppression for OFDM-based cognitive radios using constellation expansion //WCNC 2008. Las Vegas: , 2008: 888-893.
[5]  Wylie-Green M P. Adjacent frequency coding technique for decreasing MB-OFDM UWB interference to other radio services //Proceedings of IEEE Sarnoff Symposium. Piscataway: , 2006: 1-4.
[6]  Seyedi A, Saulnier G J. General ICI self-cancellation scheme for OFDM systems vehicular technology[J]. IEEE Trans on Vehicular Technology, 2005, 54(1): 198-210.
[7]  Multi Band OFDM Alliance SIG. Multi-band OFDM alliance SIG, multi-band OFDM physical layer proposal for IEEE 802.15 task group 3a. (2004) .

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133