Power Control with Adaptive MMSE Interference Suppression

碩士 === 國立交通大學 === 電信工程系 === 91 === The direct-sequence code division multiple access (DS/CDMA) transmission technique has been widely investigated and used in practical wireless communication system. In this thesis, MMSE interference suppression combined with adaptive power control is inv...

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Main Authors: Soul-Yu Chao, 趙守毓
Other Authors: Wen-Thong Chang
Format: Others
Language:zh-TW
Published: 2003
Online Access:http://ndltd.ncl.edu.tw/handle/91436470475820613049
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spelling ndltd-TW-091NCTU04350562016-06-22T04:14:27Z http://ndltd.ncl.edu.tw/handle/91436470475820613049 Power Control with Adaptive MMSE Interference Suppression 適應性最小均方誤差干擾抑制之功率控制 Soul-Yu Chao 趙守毓 碩士 國立交通大學 電信工程系 91 The direct-sequence code division multiple access (DS/CDMA) transmission technique has been widely investigated and used in practical wireless communication system. In this thesis, MMSE interference suppression combined with adaptive power control is investigated. This method achieves the users’ target SIR with the minimum total transmitted power. Four adaptive MMSE interference suppression algorithms are discussed, so are their adaptive power control methods. In Rayleigh fading channel, conventional recursive least square (RLS) algorithm cannot converge easily under fast time variation. The differential least square (DLS) algorithm that adopts differential encoding and another error function can overcome the problem. The SIR of interference suppression filter output and channel parameter must be estimated in adaptive power control combined with DLS algorithm. We propose a channel estimation method based on DLS algorithm that doesn’t need extra computations and just takes time average over the interference suppression filter output. The SIR of filter output will be acquired through the method of channel estimation. We have used the computer to simulate adaptive power control combined with DLS interference suppression in flat Rayleigh fading channel. Wen-Thong Chang 張文鐘 2003 學位論文 ; thesis 136 zh-TW
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language zh-TW
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description 碩士 === 國立交通大學 === 電信工程系 === 91 === The direct-sequence code division multiple access (DS/CDMA) transmission technique has been widely investigated and used in practical wireless communication system. In this thesis, MMSE interference suppression combined with adaptive power control is investigated. This method achieves the users’ target SIR with the minimum total transmitted power. Four adaptive MMSE interference suppression algorithms are discussed, so are their adaptive power control methods. In Rayleigh fading channel, conventional recursive least square (RLS) algorithm cannot converge easily under fast time variation. The differential least square (DLS) algorithm that adopts differential encoding and another error function can overcome the problem. The SIR of interference suppression filter output and channel parameter must be estimated in adaptive power control combined with DLS algorithm. We propose a channel estimation method based on DLS algorithm that doesn’t need extra computations and just takes time average over the interference suppression filter output. The SIR of filter output will be acquired through the method of channel estimation. We have used the computer to simulate adaptive power control combined with DLS interference suppression in flat Rayleigh fading channel.
author2 Wen-Thong Chang
author_facet Wen-Thong Chang
Soul-Yu Chao
趙守毓
author Soul-Yu Chao
趙守毓
spellingShingle Soul-Yu Chao
趙守毓
Power Control with Adaptive MMSE Interference Suppression
author_sort Soul-Yu Chao
title Power Control with Adaptive MMSE Interference Suppression
title_short Power Control with Adaptive MMSE Interference Suppression
title_full Power Control with Adaptive MMSE Interference Suppression
title_fullStr Power Control with Adaptive MMSE Interference Suppression
title_full_unstemmed Power Control with Adaptive MMSE Interference Suppression
title_sort power control with adaptive mmse interference suppression
publishDate 2003
url http://ndltd.ncl.edu.tw/handle/91436470475820613049
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