文件名称：发送端以正交函数为扩频码进行扩频-华为CDMA2000
文件大小：3.95MB
文件格式：PPT
更新时间：2024-05-13 05:51:58
cdma
发送端以正交函数为扩频码进行扩频 CDMA 核心技术 1 0 0 1 1 0110 0110 0110 0110 0110 1001 0110 0110 1001 1001 用户输入信息 正交扩频序列（正交函数） 扩频后的发送数据 +1 -1 +1 -1 By spreading ,each symbol is XORed with all the chips in the orthogonal sequence (Walsh Sequence) assigned to the user. The resulting sequence is processed and is then transmitted over the physical channel along with other spread symbols. In this figure, a 4-digit code is used. The product of the user symbols and the spreading code is a sequence of digits that must be transmitted at 4 times the rate of the original encoded binary signal.