要成为地球的静止卫星,通信卫星的运行轨道须满足哪些条件?...
Tuesday, April 30, 2024
Thursday, May 23, 2024
Thursday, May 23, 2024
一般来说,传输媒介的传输带宽()A、随传输距离的增加而增加B、随传输距离的增加而减小C、与传输距离无关...
Tuesday, April 30, 2024
请说明有线电视、市内电话、调频广播、移动电话、校园网等通信系统各使用哪些信道?...
Thursday, May 23, 2024
Tuesday, April 30, 2024
Tuesday, April 30, 2024
Thursday, May 23, 2024
Thursday, May 23, 2024
Tuesday, February 27, 2024
设PCM编码器的最大输入信号电平范围±2048mV,最小量化台阶为1mV,试对一电平为+1357mV的取样脉冲进行13折线A压扩律PCM编码,并分析其量化误差。...
Thursday, May 23, 2024
Thursday, May 23, 2024
Thursday, May 23, 2024
Thursday, May 23, 2024
Thursday, May 23, 2024
Tuesday, April 30, 2024
Thursday, May 23, 2024
Thursday, March 7, 2024
已知二进制数字信号每个码元占用的时间为1ms,1、0等概率出现,求: (1)码元速率 (2)每秒钟的信息量 (3)信息速率...
Tuesday, April 30, 2024
要成为地球的静止卫星,通信卫星的运行轨道须满足哪些条件?...
Tuesday, April 30, 2024