Optimization of Signature Waveforms and Power Allocation for Synchronous CDMA Systems under RMS Bandwidth Constraint(Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)
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概要
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This paper studies the optimization of signature waveforms and power allocation for synchronous codedivision multiple access (CDMA) systems under the root-mean-square (RMS) bandwidth constraint. The optimization is considered for two types of receivers, namely the conventional matched filter (MF) receiver and the minimum mean-square error (MMSE) receiver. For both cases, the optimization criterion is to maximize the average signal to interference ratios (SIRs) at the receivers' outputs. For a given RMS bandwidth constraint and an arbitrary power allocation scheme, a procedure to obtain the optimal signature waveforms is provided. Based on this procedure, it is then shown that the optimal power allocation is achieved when all the received powers are equal. With the optimal power allocation, solutions for the optimal signature waveforms are presented and discussed in detail. It is also demonstrated that, compared to the previously obtained Welch-bound-equality (WBE) signature waveforms, the proposed signature waveforms can significantly improve the user performance.
- 社団法人電子情報通信学会の論文
- 2003-01-01
著者
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Nguyen Ha
Department Of Electrical & Computer Engineering University Of Saskatchewan
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Nguyen Ha
Department Of Electrical Engineering University Of Saskatchewan
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SHWEDYK Ed
Department of Electrical and Computer Engineering, University of Manitoba
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Shwedyk E
Univ. Manitoba Mb Can
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Shwedyk Ed
Department Of Electrical And Computer Engineering University Of Manitoba
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