spread spectrum transmission meaning in English

宽频带传输
扩展频谱传输
展开光谱传输

The lengths , numbers and orthogonality of the pn codes are important technologies . in the thesis we analyze the methods of spread spectrum transmission of wcdma
伪码的长度，数量和正交性都是很重要的关键技术，同时也必须考虑在信道等变化时保证通信质量。
Spread spectrum communication is an excellent system , the transmission of multimedia will be necessary in the development of mobile communication . the multimedia spread spectrum transmission will be realized in the third generation mobile communication system
扩频通信技术是一种优良的体制，多媒体传输是信息发展的要求，在第三代移动通信系统中将实现多媒体扩频通信。