【正文】 ctical unity, is one of the key issues of the right munications system design .However, traditional analog devices can not fully meet the current market requirements for munication quality. On how to improve munication speed and reliability problems, this article uses Trellis Coded Modulation (TCM) techniques to achieve encoding and decoding speech signals. The transceiver implementations were based on the standard. This paper describes on the key techniques of the application of TCM in the munication in detail, including the shell mapping, constellation shaping, and encoding and decoding convolutional receiver adopts Viterbi decoding algorithm to perform error correction decoding. This paper takes TMS320C6416DSP as the core ponents, and designs a mon voice signal processing hardware platform. Around the DSP system architecture, EDMA, McBSP and AIC23 Codec are applied to build a framework for the system. PingPong technique,the concrete peripheral interface configuration for real time digital stream transmission and interrupt processing are also detailedly introduced. Through analysis of simulation results and system testing， the performance of the TCM transmission scheme mentioned above is verified. Keywords: TCM Shell Mapping Viterbi Decoding DSP 目錄 i 目錄 第一章 緒論 .............................................................................. 1 課題論述 ............................................................................................................. 1 課題背景 ................................................................................................... 1 相關(guān)技術(shù) ................................................................................................... 2 數(shù)字信號處理技術(shù)的發(fā)展 ....................................................................... 2 本文的主要研究工作 ......................................................................................... 3 論文內(nèi)容安排 ..................................................................................................... 3 第二章 TCM 網(wǎng)格編碼調(diào)制 ..................................................... 5 TCM 的基本思想 ................................................................................................ 5 TCM 的基本思想 ...................................................................................... 5 TCM 信號點集的擴展及集分割原理 ...................................................... 6 基于 標準的發(fā)送端關(guān)鍵技術(shù) ................................................................... 9 擾碼及數(shù)據(jù)分解 ....................................................................................... 9 殼 狀映射 ................................................................................................. 11 差分編碼 ................................................................................................. 14 四維網(wǎng)格編碼（ 4DTCM） .................................................................. 16 基于 標準的接收端關(guān)鍵技術(shù) ................................................................. 19 四維網(wǎng)格編碼調(diào)制的 Viterbi 譯碼 ........................................................ 19 反點映射 ................................................................................................. 21 組合及解擾 ............................................................................................. 23 第三章 音頻信號處理硬件平臺 ............................................. 25 硬件結(jié)構(gòu) ........................................................................................................... 25 DSP 芯片介紹 ................................................................................................... 25 TMS320C6416 的片內(nèi)外設(shè) .............................................................................. 27 增強型直接存儲器訪問 (EDMA) .......................................................... 27 多通道緩沖串行口 (McBSP) .................................................................. 30 音頻編解碼器 AIC23 ............................................................................. 31 第四章 音頻信號處理軟件實現(xiàn) ............................................. 35 軟件總體框架 ................................................................................................... 35 DSP 軟件開發(fā)環(huán)境 CCS 及 DSP/BIOS ........................................................... 36 信號處理中連續(xù)數(shù)據(jù)流的傳輸 ....................................................................... 38 PingPong 緩沖 ........................................................................................ 38 信號傳輸分析及配置 ............................................................................. 39 中斷處理 ................................................................................................. 42 系統(tǒng)性能測試及仿 真分析 ............................................................................... 45 結(jié)束語 ..................................................................................... 47 致 謝 ..................................................................................... 49 參考文獻 ................................................................................. 51 ii 目錄 第一章 緒論 1 第一章 緒論 近年來，通信理論和技術(shù)有著迅猛的發(fā)展。通過性能 測試及 Matlab 系統(tǒng)仿真 ， 驗證了上述 TCM 傳輸 方案 的有效性。 本文 以 TMS320C6416DSP 為核心部件， 設(shè)計 了一種通用 語音 信號處理硬件平臺。文中對 TCM 在通信中應(yīng)用的關(guān)鍵技術(shù)作了詳細研究，包括殼狀映射、星座整形和卷積碼編譯碼。 針對如何提升通信速率和可靠性的問題 ，本文中利用網(wǎng)格編碼調(diào)制（ TCM）技術(shù)來實現(xiàn)語音信號編解碼。班 級 010613 學(xué) 號 01061340 本科畢業(yè)設(shè)計論文 題 目： 基于 C6416DSK 的音頻 TCM 編解碼的程序開發(fā) 學(xué) 院： 通信 工程學(xué)院 專 業(yè)： 通信 工程 專業(yè) 學(xué)生姓名： 路璐 導(dǎo)師姓名 ： 王軍寧 摘要 摘 要 在當(dāng)今數(shù)字通信時代， 如何較合