| A Frequency－Diversity Spread－Spectrum Multiple Access System with Random Signature Sequences |
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| 作者姓名： | Cao Yewen Xiang Haige |
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| 作者单位： | Peking University，Beijing 100871 |
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| 摘 要： | ＡＦｒｅｑｕｅｎｃｙ－ＤｉｖｅｒｓｉｔｙＳｐｒｅａｄ－ＳｐｅｃｔｒｕｍＭｕｌｔｉｐｌｅＡｃｃｅｓｓＳｙｓｔｅｍｗｉｔｈＲａｎｄｏｍＳｉｇｎａｔｕｒｅＳｅｑｕｅｎｃｅｓＣａｏＹｅｗｅｎ；ＸｉａｎｇＨａｉｇｅ（ＰｅｋｉｎｇＵｎｉｖｅｒｓｉｔｙ，Ｂｅｉｊｉ...
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A Frequency-Diversity Spread-Spectrum Multiple Access System with Random Signature Sequences |
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| Cao Yewen,Xiang Haige.A Frequency-Diversity Spread-Spectrum Multiple Access System with Random Signature Sequences[J].Journal on Communications,1995(4). |
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| Authors: | Cao Yewen Xiang Haige |
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| Abstract: | A new scheme for the spread-spectrum multiple access system named Frequency-Diversity Spread-Spectrum Multiple Access(FD-SSMA)system,is proposed.In this FDSSMA system,the same information will be modulated on a group of mutually orthogonal frequency components(carriers)with a random signature sequence at the same time,and it will be demodulated by a coherent receiver for every component and then incorporated(as if using frequency diversity)on the basis of this random sequence.The spectrum of the modulated signal is very close to that of a white-noise in a wider frequency band due to orthogonality for all frequency components and property of the random sequence,the system becomes a spread-spectrum one.The(Inverse) Fast Froier Transform(IFFT,FFT) can be applied in the system,which provides additional flexibility.The performance in an asynchronous mode,such as ability of multiusers,anti-interferences,is analyzed. |
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| Keywords: | spread-spectrum multiple access frequency-diversity |
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