At last , the baseband system structure which deploys smart antenna , rake , and receive / transmit diversity techniques is proposed 最后把智能天线技术和rake接收技术、收发分集技术紧密结合，形成比较完整的智能天线系统基带结构。
Cooperative diversity is a new spatial diversity technology , while power allocation technology directly affects its efficiency and reliability 摘要协同通信是一种新的空间分集技术，而功率分配技术直接影响了协同通信的有效性和可靠性。
One of the convertion technologies of space diversity is antenna array , which is researched and ultilized in 3g and beyond 3g system 空间分集技术的一种传统的应用技术是通过多天线或天线阵列实现,并在3g , beyond3g等系统中得到研究和应用。
A joint frequency and space diversity scheme is presented which can reduce computational cost . 3 . an adaptive bit , power and subcarrier allocation is presented 分集技术，重点介绍了一种空间频率联合分集接收技术，它能够大幅度降低计算量； 3
At the same time , to achieve space , time and frequency diversity , some research is done on stf technology , which joints transmit diversity and ofdm technology 同时对发射分集技术和ofdm相结合，通过适当的编码技术来获得空、时、频分集的空时频编码技术进行了一定的研究。
In wireless communication system , signal fading arising from multipath propagation is a particularly severe channel impairment that can be mitigated through the use of diversity 在移动通信系统中,由于多径传播引起的衰落对信道产生的严重影响可以通过分集技术得到有效的解决。
The cdma system that would be used to transfer the multi - traffic and improve the performance with diversity is extensively studied for the multi - media and high speed data development in the paper 本文基于移动通信传输多媒体业务的需要，研究了多业务直扩系统，及用分集技术来提高系统性能。其主要内容和创新之处下： 1
The main contents and new ideas include : the diversity technologies that widely used in mobile communication system are discussed , and the optimal receiving techniques in correlated fading channel and independent fading channel are studied 总结和讨论了广泛运用于移动通信的分集技术，以及相关与非相关信道的最佳接收机的关系。
Among the effective methods to mitigate the fading in wireless communications is transmit diversity , which can utilize the space diversity of transmit antennae to generate the receive diversity and improve the performance of the forward link 发送分集技术是对抗无线信道衰落的重要手段，它能将发送天线的空间分集转化为接收机可以利用的分集方式，以改善前向链路的性能。
Space - time block coding is a new technique that combines coding , modulation and transmit diversity . it has been an ideal candidate for improving wireless communication performance and increasing data rates in systems with bandwidth constraints 空时分组编码是将编码、调制和发射分集技术结合起来的一种新兴技术，它是改善无线通信性能、提高带限系统数据速率的一种理想的选择。
