STUDY ON THE CHARACTERISTIC OF CODE-DIVISION MULTIPLE-ACCESS SYSTEM OVER FADING CHANNEL
張元輝、鍾翼能
E-mail: 9125194@mail.dyu.edu.tw
ABSTRACT
THE EFFECT IN SYSTEM PERFORMANCE INDUCED BY FADING CHANNEL FOR THE WIRELESS
COMMUNICATI -ON SYSTEM, WHICH IS ADOPTED AS MAIN TECHNICAL FOR THE 3RD-GENERATION MOBILE COMMUNICATIO -N SYSTEM, IS VERY SIGNIFICANTLY.DUE TO THIS POINT, WE INVESTIGATE SOME OF THIS ISSUES FOL -LOW ABOUT MODULATION SCHEMES DETAIL IN THIS PAPER,IN WHICH WE MAINLY INVOLVE THE PERFORMA -NCE ANALYSIS FOR CDMA OPERATING IN CHANNEL FADING ENVIRONMENTS,SPECIFICALLY, THE CORRELAT -ION COEFFICIENT BETWEEN MULTIPATH WAS
DISCUSSED.WE ARE NOT ONLY DERIVED THE NECESSARY VAR -IANCE FORMULAS INCLUDING IN EVERY KINDS OF INTERFERENCE,BUT THE PROBABILITY DENSITY FUNCT -ION (PDF) OF SIGNAL-TO-NOISE RATIO (SNR) ON THE OUTPUT OF THE RAKE RECEIVER ALSO OBTAINED .AT LAST,A NEW CLOSED FORM FOR AVERAGE BIT ERROR RATE ABOUT THE FACT OF EFFECTIVE OF PROCE -SSING GAIN, USER
NUMBER,AVERAGE POWER DECAY RATE,AND DIVERSITY BRANCH NUMBER FOR CDMA WAS DERIVED. IT IS ALSO PROVED BY MEANS OF THE NUMERICAL RESULTS.
Keywords : fading channel ; code-division multiple-access (CDMA) ; statistical distribution ; RAKE receiver.
Table of Contents
第一章 緒論 1.1研究動機--P1 1.2研究目的--P1 1.3研究範圍--P3 1.4本文架構--P4 第二章 分碼多工進接系統工作理論--P7 2.1 直序式展頻系統架構--P7 2.1.1 直序式展頻接收機架構--P7 2.1.2 直序式展頻發射機架構--P9 2.1.3 直序展頻系統之高斯近 似效能分析--P12 2.2 跳頻展頻系統--P17 第三章 傳輸波道衰落現象--P21 3.1衰落波道之分類--P21 3.1.1小尺度衰落模式--P22 3.1.2大尺度衰落模式--P24 3.2 衰落波道所造成失真之改善技術--P25 3.2.1 頻率選擇性衰落波道之改善技術--P24 3.2.2 快速 衰落所造成失真現象之改善技術--P27 3.2.3 頻率非選擇性衰落改善技術--P27 3.3衰落波道（FADING CHANNEL）之模 式--P29 第四章 衰落波道中CDMA之分析--P34 4.1 指數相依之討論--P36 4.2 等相依之討論--P37 4.3 整體效能之討論--P38 第 五章 數值分析--P41 第六章 結論--P56 參考文獻--P57
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