论文部分内容阅读
FM传输一般都要求使用预加重以减小接收信号中的杂波效应。但PAL和SECAMFM传输中所需的预加重量,对于MAC传输来说是不必要的。尽管如此,少量加一点预加重,也会有利于改善MAC传输中的高频杂波性能。
FM transmissions generally require the use of pre-emphasis to reduce clutter effects in the received signal. However, the amount of preemphasis needed for PAL and SECAMFM transmissions is not necessary for MAC transmission. However, a small amount plus a little pre-emphasis will also help to improve high frequency clutter performance in MAC transmission.