Merits of the Linear FM are that it is not necessary to have an equalizer or the spreadspectrumcode modulation.
线性调频调制的优点是：不须在接收端添加均衡滤波器，也不须进行扩频编码。
2
Then digital matched filter (DMF), which is used to synchronize spreadspectrumcode, especially the multi-rate sampling in DMF is studied.
然后探讨了用于扩频码同步的数字匹配滤波器（DMF），着重分析了DMF的多倍码速率采样问题；
3
A distributed multiple access protocol, which is based on spreadspectrumcode switching technique, for the integrated voice and data in packet radio networks is proposed.