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博碩士論文 etd-0726114-140343 詳細資訊
Title page for etd-0726114-140343
論文名稱
Title
多輸入多輸出系統中以隨機向量量化通道資訊設計湯利森哈馬遜預編碼器之敏感度分析
Sensitivity Analysis for RVQ-based Tomlinson-Harashima Precoded MIMO Systems
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
41
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2014-07-29
繳交日期
Date of Submission
2014-09-04
關鍵字
Keywords
過量均方誤差、隨機向量量化、通道方向資訊、多輸入多輸出、湯利森哈馬遜前置預編碼器
Multiple-input multiple-output, Tomlinson-Harashima precoder, Excess mean-squared error, Random Vector Quantization, Channel direction information
統計
Statistics
本論文已被瀏覽 5708 次,被下載 576
The thesis/dissertation has been browsed 5708 times, has been downloaded 576 times.
中文摘要
本篇論文提出在多輸入多輸出下的湯利森哈馬遜前置預編碼器設計來消除符號間干擾,然而在傳送端必須至少知道完美的通道方向資訊來設計湯利森哈馬遜前置預編碼器減輕干擾。使用隨機向量量化通道回授,我們可以將量化的通道方向資訊回傳給傳送端,但不可避免的量化誤差會影響傳送端的效能,在此情況下,我們去探討在使用通道方向資訊的回授機制下,因隨機向量量化通道所降低效能的現象。我們利用過量均方誤差來衡量降低效能的大小,但量化誤差所制定的過量均方誤差函數是一個複雜的函數,我們使用二階的泰勒展開式推導出我們的分析結果。最後電腦模擬結果也證實了我們提出的分析結果,與真正的過量均方誤差吻合。
Abstract
Tomlinson-Harashima precoded (THP) multiple-input and multiple-output (MIMO) systems are developed to cancel the inter-symbol interference at the transmitter.
However, the THP at least requires perfect channel direction information (CDI) to completely mitigate the interference at the transmitter, which is not practical in the real
world. The limited-feedback systems are developed to convey the quantized CDI to the
transmitter. Using the quantized CDI to conduct the THP, an unavoidable interference
degrades the performance at the receiver. In this correspondence, we investigate the
performance degradation resulted from the random vector quantization (RVQ), which is
a kind of CDI-based limited feedback mechanism. Here, we measure the performance
degradation as the excess mean-squared error (EMSE). Since the formulation of the
EMSE is a complicated function of the quantization error, we proposed using the second-order Taylor expansion to derive an analytical result. Simulation results have
also verified our proposed analysis, showing that the derived analysis can match the
exact EMSE.
目次 Table of Contents
論文審定書…………………….……………………………………..……………….....i
誌謝………………………………………………………...…..…………...……….....ii
中文摘要……………………….……………………………………..……………….. iii
英文摘要………………………………………………………..………..…...……..... iv
目錄……………………………………………………………..………….....…………v
圖次……………………………………………………………….…………....……... vi
第1章 序言……………………………………………………………………….……..1
第2 章 系統模型與最佳化設計………………………………………………...…....10
第2.1節 系統模型………………………………………………….………........……10
第2.2節 已知通道方向資訊的湯利森哈馬遜前置預編碼設計…........……....…...11
第3 章 過量均方誤差分析……………………………………………..…….…....…13
第3.1 節 接收端使用隨機向量量化通道方向資訊……………………............….13
第3.2 節 過量均方誤差分析…………….………………………………...........….14
第4章 系統模擬及探討………………………………………………………….……22
第5章 結論與未來展望………………………………………………………….……27
附錄.……………………………………………………………………………….…..28
參考文獻……………………………………………………………………………….30
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