| A modified multitarget adaptive array algorithm for wireless CDMA system |
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| 作者姓名： | 刘云辉 杨宇航 |
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| 作者单位： | Department of Electronic Engineering，Shanghai Jiaotong University，Shanghai 200030，China，Department of Electronic Engineering，Shanghai Jiaotong University，Shanghai 200030，China |
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| 摘 要： | INTRODUCTION The technology of smart or adaptive antennawhich can increase capacity and range, and reducesmultipath propagation of mobile radio communi-cation system, has aroused great interest in recentyears (Haardt and Spencer, 2003; Bellofiore, 2002;Godara, 1997). Beamforming is a key technologyin smart antenna systems (SAS) and many differentadaptive beamforming algorithms have been pro-posed. Code division multiple access (CDMA)system will be applied in most mobile communi-…
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A modified multitarget adaptive array algorithm for wireless CDMA system |
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| LIU Yun-hui ?,YANG Yu-hang.A modified multitarget adaptive array algorithm for wireless CDMA system[J].Journal of Zhejiang University Science,2004(11). |
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| Authors: | LIU Yun-hui ? YANG Yu-hang |
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| Abstract: | The paper presents a modified least squares despread respread multitarget constant modulus algorithm (LS-DRMTCMA). The cost function of the original algorithm was modified by the minimum bit error rate (MBER) criterion. The novel algorithm tries to optimize weight vectors by directly minimizing bit error rate (BER) of code division multiple access (CDMA) mobile communication system. In order to achieve adaptive update of weight vectors, a stochastic gradient adaptive algorithm was developed by a kernel density estimator of possibility density function based on samples. Simulation results showed that the modified algorithm remarkably improves the BER performance, capacity and near-far effect resis- tance of a given CDMA communication system. |
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| Keywords: | Smart antenna Code division multiple access (CDMA) Minimum bit error rate (MBER) Near-far effect |
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