expanded channel 中文意思是什麼
expanded channel
解釋
擴散流道-
Turbo codes represent the new code structures, which consist of pccc ( parallel serially convolutional code ) and sccc ( serially concatenated convolutional code ). in this paper, the background of turbo codes are firstly introduced, which includes the base principle of error correction code 、 block code and convolutional code ; the principle of turbo code and the iterative decoding is secondly expanded ; the key decoding algorithm : a revised map algorithm and iterative decoding theory are detailed ; then, a new turbo code structure : hccc ( hybrid concatenated convolutional code ) is presented, and the capacity of this code method is analyzed, the average capacity upper bound is derived ; at last, this code is simulated on awgn ( additive white gaussian noise ) channel and rayleigh fading channel
本文首先介紹了turbo碼的背景知識，包括差錯控制的基本原理、分組碼和卷積碼；然後闡述了turbo碼的基本原理，包括turbo編譯碼器結構及迭代譯碼原理；較為詳細地描述了關鍵的譯碼演算法： ?種改進的最大后驗概率（ map ）譯碼演算法及迭代譯碼演算法；提出了一種新的turbo碼結構：混合turbo碼（混合級聯卷積碼） ；並用編碼性能聯合界分析方法對混合turbo碼進行了性能分析，得出了其平均性能上界；並在高斯白噪聲通道和瑞利衰落通道上分別作了一些應用研究及計算機模擬實驗。 -
In this paper, the model of the traditional power control aigoritiun used in cdma system is expanded. with the perf0rmance of the multiuser detection introduced into the power control, the improvement of the capability is discussed. moreover, the concept is used into the power control algorithm based on game theory with consideration of the tboe - varying chaiml, three strategies of power control are proposed : ( l ) the joint power control algorithm based on the multiuser detection ; ( 2 ) the joint power control algoritlun based on the game theory ; ( 3 ) the joint power control algoritlun based on channel estimation
本文介紹了cdma系統中傳統功率控制演算法的基本模型，討論了將多用戶檢測效果引入到功率控制中，系統性能的改善程度，並將這一思想應用到基於博弈論功率控制演算法當中，同時還考慮了通道時變特性的影響，提出了三種不同的功率控制策略： （ 1 ）基於mmse多用戶檢測的聯合功率控制演算法； （ 2 ）基於博弈論的聯合功率控制演算法； （ 3 ）基於通道估計的聯合功率控制演算法。
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