Then the different channel models for multiplex antenna systems are given. And the system capacities for single user and multiuser multi-antenna systems are analyzed. A new improved quasi-orthogonal inserted Walsh codes method is proposed, which makes the code number for spreading spectrum system greatly increased.
介绍了多天线信道不同建模方法,给出了单用户和多用户的多天线系统容量。
the key to speeding up larch species improvement is combining sexual propagation with asexual one, establishing the rotative cuttings orchard and spreading the elite families and the second-generation single tree on a large scale by using softwood cuttings under full sunshine and automatic control of spraying.
有性繁殖与无性繁殖相结合,建立轮回采穗圃,用全光自控喷雾扦插技术,大规模推广优良家系和第2代优良单株,是加快落叶松树种改良进程的关键。
a single toad is slowly spreading to all parts of the area.
一只蟾蜍正缓慢地扩散到该区域的各个地方。
英语网 · 少儿英语故事
英语网 · 双语娱乐资讯
英语网 · 中考英语
英语网 · 英语词汇