Spectrum Sensing in MB-OFDM Based Cognitive UWB Systems Coexistence With WiMax
Cognitive UWB systems have been developed into a promising solution for more efficient spectrum resource usage. Due to the broad bandwidth of operation, cognitive UWB systems have to coexist with other radio systems that occupy the same bandwidths. MB-OFDM technology is adopted in UWB physical layer since it has an inherent ability to offer better coexistence. Spectrum sensing has been identified as a key function to ensure mutual friendly coexistence. This paper explores the issues in coexistence between cognitive UWB systems and WiMax. A spectrum sensing algorithm based on the Neyman-Person criterion is proposed. The estimator-correlator is theoretically derived and reduced to the energy detector for practical application. The performance results indicate that the MBOFDM receiver based on energy detector will enable robust detection of the WiMax uplink signal.
spectrum sensing coexistence cognitive UWB WiMax
FAN Bo HAN Fang-jing ZHANG Ai-min HAN Fang-jian
School of Electronic Science and Engineering National University of Defense Technology Changsha 410073,China
国际会议
广州
英文
2008-11-19（万方平台首次上网日期，不代表论文的发表时间）