In order to increase the capacityofchannel, the frequency of carrier wave moved to higher endlessly.
为了增加信道容量,载波频段不断地向高频方向移动。
2
Because capacityofchannel is limited by interference. Especially for the interference from the same channels and the adjacent channels.
由于信道的容量是由干扰所限定的,尤其是同信道干扰和邻信道干扰的影响更为严重。
3
Conventional CDMA communication system has serious mutiple access interference (MAI), so the spectral efficiency and user capacityofchannel is not maximum.
CD MA技术存在着严重的多址干扰(MAI),使得信道的频谱效率未能达到最佳,系统的用户容量也不易达到最大。