DTMF信號編、解碼器設(shè)計及仿真

論文編號:TX413  論文字數(shù):7853,頁數(shù):33

DTMF信號編、解碼器設(shè)計及仿真
摘  要

 DTMF（dual tone multiple frequency）編碼是用兩個單頻音的合成音來表示一個數(shù)字或符號。 DTMF解碼是用特定的方法或算法識別兩個單頻音的合成音，提取其包含的數(shù)字或符號信息。DTMF信號編碼、解碼已經(jīng)成為一種非常成熟的技術(shù)，依循的技術(shù)規(guī)范是ITU Q.23。相對于脈沖撥號方式，DTMF 方式的優(yōu)點是撥號速率高，通話期間也適用，不會引入明顯的干擾。DTMF 編碼技術(shù)主要包括單音發(fā)生和雙音合成兩部分；DTMF解碼技術(shù)主要包括雙音檢測、收發(fā)同步和單音分離判別三部分。理解和解決這些技術(shù)問題對研發(fā)和設(shè)計一般通信設(shè)備和系統(tǒng)具有普遍意義。
 本文在分析討論原有的DTMF編碼、解碼方法的基礎(chǔ)上分別提出了一種新的DTMF 編碼算法和一種新的DTMF 解碼算法。在Ti的TMS320C64XX DSP 上仿真結(jié)果表明，新的DTMF編碼、解碼算法簡單易于實現(xiàn)，編碼效率高，運行速度快，解碼誤差率低，是很有實用價值的算法。
                                                                                      
關(guān)鍵詞：DTMF信號編碼 DTMF信號解碼  TMS320C64XX DSP應(yīng)用

DTMF signal encoder and decoder design and simulation
ABSTRACT

DTMF (dual tone multiple frequency) encoding is to use the synthesis of two single-tone sounds to indicate a number or symbol. DTMF decoding is to use a particular method or algorithm to recognize the synthesis of two single-tone sound, and extract information which contained within the numbers, or symbols. DTMF signal encoding and decoding has become a very mature technology, that follows the technical specification ITU Q.23. Relative to the pulse dialing, DTMF dialing method has the advantage of high rate, and applies during a call without introducing significant interference. DTMF tone encoding techniques include the occurrence and synthesis of two-tone ; DTMF decoding techniques include dual-tone detection, tone transceiver separation of synchronization and identification .Understanding  and solving these technical problems has universal significance for designing in general communications equipment and systems.
On the analyzing result of some of the existing DTMF signal encoding, we has advanced a new DTMF signal encoding and decoding algorithm respectively in the paper. The result of simulation analysis on Ti TMS320C64XX DSP shows that the new DTMF signal encoding and decoding algorithm are simple and easy to realize, possess high coding efficiency, high rate to run,and decoding error rate very low , have practical application value.

Keywords: DTMF Signal Encoding DTMF Signal Decoding TMS320C64XX DSP Application

目  錄

摘  要 I
ABSTRACT II
1 引言 1
2 雙音多頻信號技術(shù)規(guī)范 2
3 雙音多頻信號發(fā)生算法分析論證 3
3.1 雙音多頻信號發(fā)生現(xiàn)有算法分析 3
3.2 改進的雙音多頻信號發(fā)生編碼算法 5
4 雙音多頻信號解碼算法設(shè)計論證 7
4.1 雙音多頻信號接收解碼現(xiàn)有算法分析 7
4.2 一種新的雙音多頻信號接收解碼算法 8
5 C64xx DSP 性能特點 11
5.1 C64xx DSP硬件結(jié)構(gòu) 11
5.2 C64xx DSP指令系統(tǒng) 12
5.3 DSP集成開發(fā)工具CCS 15
6 算法實現(xiàn)DSP源程序注解 17
7 算法仿真結(jié)果與討論 23
7.1 雙音多頻信號發(fā)生編碼算法仿真結(jié)果 23
7.2 雙音多頻信號接收解碼算法仿真結(jié)果 23
7.3 算法仿真結(jié)果討論 23
8 結(jié)論 24
參考文獻 25
附錄：DTMF 編碼、解碼數(shù)據(jù)表 26
謝辭 29