Adaptive RAKE receiver in chaos based pilot-added DS-CDMA system |
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| Institution: | 1. Institute of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China;2. School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | This paper presents the theoretical analysis of adaptive multiuser RAKE receiver scheme in frequency selective fading channel for direct-sequence code division multiple access (DS-CDMA) system. Least mean square (LMS) algorithm is used to estimate the channel coefficients. Chaotic sequences are used as spreading sequence and corresponding bit error rate (BER) in closed form is derived for imperfect channel estimation conditions. Performances of chaotic sequences are compared with pseudorandom noise (PN) sequences. Under perfect synchronization assumption, various simulation results are shown to investigate the performance of the proposed system. |
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| Keywords: | Channel estimation Chaotic sequences Code division multiple access (CDMA) Frequency selective channel Least mean square (LMS) RAKE receiver |
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