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| Research on the Electromagnetic Compatibility of Four Ultra-wideband Spread Spectrum Schemes |
| Zhao Liang Jin Liang Liu Shuang-ping Huang Kai-zhi Zhong Zhou |
| National Digital Switching System Engineering & Technological R&D Center, Zhengzhou 450002, China |
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Abstract As the protection distance is limited, ultra-wideband signals may still interfere another communication system even with the satisfaction of the power spectral density limit. This paper derives the common expressions of bit error rate of another communication system without spread spectrum under the interference of the four ultra-wideband spread spectrum signals which pass through AWGN channel, and the four ultra-wideband spread spectrum schemes are direct sequence spread spectrum, time-hopping spread spectrum, frequency-hopping spread spectrum and chirp spread spectrum. The derived expressions are validated by Monte Carlo simulations. Also provided here are the simulation results obtained when ultra-wideband spread spectrum signals pass through IEEE 802.15.3a CM4 channel. The conclusions can be used as important references for the electromagnetic compatibility performance evaluation and the selection of spread spectrum schemes of ultra-wideband systems.
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Received: 25 June 2010
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Corresponding Authors:
Zhao Liang
E-mail: zhaoliangnn@gmail.com
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2011, Vol. 33 
