使用慢速跳頻及差分相移鍵調變在部分頻帶雜訊干擾之相關性瑞雷衰落通道下的分集碼設計及效能

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王瑞麟(Jui-Lin Wang) 查詢紙本館藏

畢業系所

電機工程學系

論文名稱

使用慢速跳頻及差分相移鍵調變在部分頻帶雜訊干擾之相關性瑞雷衰落通道下的分集碼設計及效能
(Diversity Codes for Slow Frequency Hopping/Differential Phase Modulation in Correlated Rayleigh Fading channels with Partial-Band Noise Jamming)

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摘要(中)

本論文針對一個簡單的分集計畫 [1]，探討其經過慢速跳頻後在部分頻帶雜訊干擾與相關性瑞雷衰落通道環境下的效能。在傳送端，包含非線性區塊的編碼器，差分相移鍵的調變器，交錯混和器與慢速跳頻器。這裡考慮三種通道訊息狀態(NCSI、PCSI、CSI)，並在接收端採用三種解碼器 (視通道訊息而定)，逐字接收分集信號。分析與模擬此分集計畫在個別狀態下對部分頻帶雜訊干擾之抵抗效能，並對所有狀態之接收效能進行綜合比較。分集系統在CSI狀態下使用最大可能性分集解碼器對部分頻帶雜訊干擾具最大抵抗力。最後，利用聯合邊界作為碼價值計算的辦法，使用碼搜尋程序搜尋好的分集碼。

摘要(英)

This thesis proposes a simple diversity scheme [1] through slow frequency hopping which operates on the correlated Rayleigh fading channels with partial-band noise jamming. The transmitter consists of a nonlinear block encoder, a symbol interleaver, a differential phase modulator, and a slow frequency hopper. Three kinds of channel side information (NCSI, PCSI, CSI) are considered in this thesis. Three different systems with or without using channel side information are developed to detect the received diversity signal codeword by codeword. Union bound and simulation are derived to assess the codeword error probability characteristics of the systems. It is concluded that the system using maximum likelihood diversity decoder and CSI offers the best resistance against partial-band jamming noise. According to the union bound as the code merit figure, useful short diversity codes are searched based on the code search procedure.

關鍵字(中)

★ 部分頻帶雜訊干擾
★ 分集計畫
★ 慢速跳頻
★ 瑞雷衰落通道
★ 差分相移鍵
★ 最大可能性
★ 碼價值計算

關鍵字(英)

★ slow frequency hopping
★ partial-band noise jamming
★ differential phase modulation
★ diversity scheme
★ Rayleigh fading
★ CSI

論文目次

圖表索引 iii
第一章緒論 1
1.1 傳統分集計畫與分集碼之簡介 …………………………1
1.2 跳頻系統簡介 ……………………………………………3
1.3 研究動機 …………………………………………………4
第二章系統與通道模型 5
2.1 系統模型 …………………………………………………5
2.2 通道模型 ………………………………………………..11
2.3 接收信號的統計特性 …………………………………..13
第三章慢速跳頻/分集碼差分相移鍵調變在不同通道訊息狀態(NCSI、PCSI、CSI)下之效能 16
3.1 在CSI狀態下之非同調偵測與錯誤率分析 ………………16
3.1.1 最大可能性分集解碼器之效能分析與模擬 …20
3.1.2 分集碼之搜尋 …………………………………27
3.1.3 干擾模式決策錯誤之模擬結果與討論 ………32
3.2 在PCSI狀態下之非同調偵測與錯誤率分析 ………36
3.2.1 傳統解碼法之效能模擬 ………………………36
3.2.2 穿孔解碼法之效能分析與模擬 ……………44
3.2.3 分集碼之搜尋 ………………………………48
3.3 在NCSI狀態下之非同調偵測與錯誤率分析 …………51
3.3.1 傳統解碼法之效能模擬 ……………………….51
3.3.2 訊號與熱雜訊必v比(SNR)對抵抗部分頻帶雜訊干擾之影響 …………………………………….53
3.4 解碼效能綜合比較與討論 ……………………………56
第四章結論 59
中英對照表 I
參考文獻 IV

參考文獻

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指導教授

鐘嘉德(C.D. Chung)

審核日期

2002-6-7

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