本文先分析了PSK和DPSK系統的基本調制解調方法,用PCM編碼将模拟信号轉換為離散的數字信号,然後運用MATLAB來仿真得到相應波形。通過仿真,觀察了調制解調過程中各個環節時域和頻域的波形,并結合調制原理,跟蹤分析比較了各種調制方法的性能,
目錄
摘要................................................................................................................................. 1 Abstract........................................................................................................................... 2 1.設計目的與要求 ............................................................................................................ 3 2.方案的選擇 ................................................................................................................... 4
2.1調制部分 ............................................................................................................. 4
2.2解調部分 ............................................................................................................. 4 3.單元電路原理和設計 ..................................................................................................... 6
3.1PCM編碼原理及設計 ........................................................................................... 6
3.1.1PCM編碼原理 ............................................................................................ 6 3.1.2用matlab實作PCM編碼 ............................................................................ 9 3.2PSK調制解調電路 .............................................................................................. 12
3.2.1PSK調制解調原理 .................................................................................... 12 3.2.2用matlab實作PSK系統的調制解調 ......................................................... 15 3.3DPSK調制解調電路 ........................................................................................... 19
3.3.1DPSK的調制解調的原理 ........................................................................... 19
3.3.2用matlab實作DPSK系統的調制解調....................................................... 21
4.仿真分析 ..................................................................................................................... 26 5．收獲與體會 ............................................................................................................... 33 參考文獻........................................................................................................................ 34 緻謝............................................................................................................................... 35