Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/8899
標題: 單載波與多載波碼分多址通訊系統之訊號處理:聯合檢測,適應性渦輪等化器與收斂性分析
Signal Processing for Single- and Multi-Carrier CDMA Communication System: Joint Detection, Adaptive Turbo Equalization and Convergence Analysis
作者: 王宣富
Wang, Hsuan-Fu
關鍵字: JD
聯合檢測器
OFDM-CDMA
MC-DS-CDMA
LMS
Adaptive Turbo Equalizer
正交分頻多工-碼分多址
多載波-直接序列-碼分多址
最小均平方
適應性渦輪等化器
出版社: 電機工程學系所
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摘要: Orthogonal frequency divisionmultiplexing-code divisionmultiple access (OFDMCDMA) has arrested a lot of attention, owing to the simple implementation and powerful resistance to frequency-selective channels and the code division multiple access (CDMA) with the suitability for multiuser systems. The proposed OFDM-CDMA joint detector (JD) do not require Discrete Fourier Transform (DFT) or Fast Fourier Transform (FFT) operations and can be used to compensate the channel distortion. Hence for hardware implementation, the proposed detectors are more efficient than the conventional methods. Three LMS algorithms based receiver architectures with adaptive equalizer and turbo decoder for MC-CDMA system are investigated in multipath channels. The performance of the proposed adaptive turbo equalizers is not only investigated in coherent MC-CDMA system, but also for non-coherent MCCDMA system with differential PSK (DPSK) in multi-path channels. The transient behaviors of symbol-rate adaptive receivers for DS-CDMA,MC-CDMA andMC-DSCDMA systems in dispersive multi-path environment are studied. The input signal vector is modeled as a simple stochastic model to simplify the analyses of convergence the least mean square (LMS) and normalized least mean square (NLMS) adaptive receivers. The receiver utilizes the derived optimal step-size sequence not only has faster convergent speed, but also smaller ensemble-averaged mean square error (MSE).
URI: http://hdl.handle.net/11455/8899
其他識別: U0005-2206201015433800
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-2206201015433800
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