【摘要】 用软件实现了卫星数字电视信号信道编码中基带滤波和ＱＰＳＫ调制的计算．输入“１”、“０”串行数据，生成高频调制信号波形文件．由任意信号发生器 ＬＷ４２０产生符合欧洲远程通信标准（ＥＴＳ３００ ４２１）的７０ＭＨｚ载波传输信号．该软件还可以用来生成１６ＱＡＭ、３２ＱＡＭ、６４ＱＡＭ、１２８ＱＡＭ的波形数据文件．更多还原

【Abstract】 The calculation of baseband shaping and QPSK (Quadrature Phase Shift Keying) modulation in DVB-S channel encoding is implemented by the software. After the serial data of "1" and "0" inputted. the high-frequency modulation signal waveform data file will be generated The arbitrary waveform generator-LW420 will produce the 70 MHz carrier transmission signal in accord with the European telecommunication standard (ETS 300 421). Moreover, this software can also be used to generate the waveform data files of l6QAX 32QW 64QAM and l28QAM更多还原