YANG Cheng, ZHOU Zheng, WANG Shu-bin, ZOU Wei-xia

" /> Block Turbo code modulation for MB-OFDM-based cognitive radio to suppress its side-band interferences

中国邮电高校学报(英文) ›› 2009, Vol. 16 ›› Issue (2): 29-34.doi: 10.1016/S1005-8885(08)60197-1

• Wireless • 上一篇    下一篇

Block Turbo code modulation for MB-OFDM-based cognitive radio to suppress its side-band interferences

杨程,周正, WANG Shu-bin, ZOU Wei-xia   

  1. Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-04-30
  • 通讯作者: 杨程

Block Turbo code modulation for MB-OFDM-based cognitive radio to suppress its side-band interferences

YANG Cheng, ZHOU Zheng, WANG Shu-bin, ZOU Wei-xia   

  1. Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-04-30
  • Contact: YANG Cheng

摘要:

To suppress the side-band interferences caused by multiband orthogonal frequency division multiplexing (MB-OFDM)-based cognitive radio systems, a mathematical expression of the side-band signal is derived. Based on this expression, the constraints among the transmitted symbols, which help to suppress the interferences, are obtained. Combined with the constraints, a type of block Turbo code modulation scheme is proposed. In the modulation scheme, the side-band interferences are attenuated quickly. Compared with other techniques, in this scheme, the interference suppression is implemented more easily and sufficiently. Simultaneously, the bit error rate (BER) performance can be improved. Theoretical analyses and simulation results show that it is highly applicable for MB-OFDM-based cognitive radio systems to suffer from Rayleigh fading.

关键词:

MB-OFDM,;cognitive;radio,;block;Turbo;code;modulation,;BER;performance

Abstract:

To suppress the side-band interferences caused by multiband orthogonal frequency division multiplexing (MB-OFDM)-based cognitive radio systems, a mathematical expression of the side-band signal is derived. Based on this expression, the constraints among the transmitted symbols, which help to suppress the interferences, are obtained. Combined with the constraints, a type of block Turbo code modulation scheme is proposed. In the modulation scheme, the side-band interferences are attenuated quickly. Compared with other techniques, in this scheme, the interference suppression is implemented more easily and sufficiently. Simultaneously, the bit error rate (BER) performance can be improved. Theoretical analyses and simulation results show that it is highly applicable for MB-OFDM-based cognitive radio systems to suffer from Rayleigh fading.

Key words:

MB-OFDM;cognitive radio;block Turbo code modulation;BER performance