Ultra Wideband Time Hopping Impulse Radio Signal Impact on Performance of TD-SCDMA(Co-existence, <Special Section>Ultra Wideband Systems)
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概要
- 論文の詳細を見る
This paper studies power spectrum density (PSD) of multi-user aggregate time hopping (TH) ultra wideband (UWB) signal with asynchronous transmission and synchronous transmission. TH codes under consideration are deterministic periodic code and random integer code. Based on the PSD, the in-band interference power for TD SCDMA is investigated as function of UWB system parameters. Two UWB modulations, TH pulse position modulation (PPM) and TH BPSK, are considered for calculating the in-band interference power. The numerical results indicate that asynchronous transmission is an effective way to decrease the peak in-band interference caused by multi-user aggregate TH-PPM UWB signal. Although increasing the maximum of time hopping code elements can smooth the PSD of TH UWB signal, it is not a good idea for reducing the peak in-band interference for TD SCDMA. For the random integer TH code, while only TH UWB continuous spectral exists in TD SCDMA band or multi-user signals of TH UWB are transmitted asynchronously, the in-band interference for TD SCDMA is in proportion to the number of the UWB users. For TD SCDMA in which band discrete spectral line exists the in-band interference caused by TH UWB with synchronous transmission is in proportion to the square of the number of the UWB users.
- 社団法人電子情報通信学会の論文
- 2005-09-01
著者
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LI Shaoqian
National Key Lab of Communications, Univ of Elec. Sci.& Tech. of China
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Li Shaoqian
National Key Lab Of Communication In University Of Electronic Science And Technology Of China (uestc
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Li Shaoqian
National Key Laboratory Of Communication University Of Electronic Science And Technology Of China
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YUE Guangrong
National Key Laboratory of Communication, University of Electronic Science and Technology of China
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CHEN Hongyu
National Key Laboratory of Communication, University of Electronic Science and Technology of China
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Yue Guangrong
National Key Laboratory Of Communication University Of Electronic Science And Technology Of China
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Chen Hongyu
National Key Laboratory Of Communication University Of Electronic Science And Technology Of China
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