Sunday, March 3, 2024
Tuesday, April 30, 2024
Tuesday, April 30, 2024
Tuesday, April 30, 2024
问题: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
Tuesday, April 30, 2024
问题:数字基带信号经过()之后变成了()信号,可以在带通信道中传输。...
Tuesday, April 30, 2024
Thursday, March 7, 2024
Thursday, March 7, 2024
Thursday, March 7, 2024
Tuesday, April 30, 2024
问题:当数字信号传输过程中出现误码时,通信系统采用哪些手段来减少误码的影响?...
Tuesday, April 30, 2024
Thursday, March 7, 2024
问题:什么叫码重?什么叫码距?最小码距的物理意义是什么?...
Tuesday, April 30, 2024
问题:ASK、FSK、PSK和DPSK四种信号,()是非等幅信号,()信号的频带最宽。...
Tuesday, April 30, 2024
Thursday, March 7, 2024
Tuesday, February 27, 2024
问题:下列通信介质中,传输频率最高的介质是()A、双绞线B、同轴电缆C、地面微波D、光纤...
Sunday, March 3, 2024
问题:为什么要进行数字调制?常用的数字调制方式有哪几种?...
Tuesday, April 30, 2024
Sunday, March 3, 2024