Research of the Scheme for the EPON System Bandwidth Expansion(GIG-BE) EPON系统带宽扩展(GIG-BE)方案的研究
Space-time coding introduces the correlations in both time and space domains when signals are transmitted by different antennas, which can greatly enhance the data transmission rate and improve the performance without bandwidth expansion or transmit power augment. 空时编码在不同天线发送的信号间引入了时域和空域相关,可在不增加带宽和发送功率的情况下,极大地提高信息传输速率和改善信息传输性能。
Study on the Insertion Loss Balancing and Bandwidth Expansion(GIG-BE) for 360 ° Analog Phase Shifter 360°模拟移相器平衡插入损耗和拓宽频带的研究
Since the scheme of transmit diversity based on space-time block code can not only reduce the BER of system greatly, but also does not require any bandwidth expansion, it is a hotspot in mobile communication system. 基于空时分组码的发射分集技术既能很大程度地改善通信系统的误码性能,又不需要占用额外的频谱资源,还具有良好的频带利用率,是近年来的研究热点之一。
Trellis-Coded Modulation ( TCM ) is an advanced combined coding and modulation technique evolved in recent years. In TCM, significant coding gains can be obtained without bandwidth expansion or reduction of transmission rate. 网格编码调制(TCM)是近年来提出的一种先进的组合编码调制技术,在不降低信息传输率、不扩展占用频带的前提下,它能获得可观的编码增益。