其次，本文提出了协作分集的概念。
Secondly, this paper introduced the concept of cooperation diversity.
协作分集协议研究现状与比较；
The current development and compare of cooperative diversity protocols;
最后，本文提出基于网络编码协作分集技术的切换方案。
Lastly, we propose a handover plan based on network-coded cooperative diversity technology.
协作分集技术能够克服多径衰落，有效的改善系统传输的可靠性。
Cooperative diversity technology can overcome the multipath fading and improve the effectiveness of system transmission.
计算机仿真表明，在衰落条件下采用协作分集可以有效地提高信道容量。
We analyze the channel capacity of a relay channel model employing cooperative diversity. Computer simulations show that cooperative diversity can increase the channel capacity substantially.
在现有的各种协作分集协议中，分布式空时编码是最有代表性的协作协议。
In all the cooperative diversity protocols, Distributed SpaceTime Coding (DSTC) is the most representative.
考虑对数路径损耗模型下采用非再生信道的协作分集技术提高信道容量问题。
This paper considers a non-regenerative cooperative diversity technique under the well-known log-distance path loss model.
采用LDPC码的结构研究了协作分集网络中的网络编码构造，并把它拓展到多跳网络中。
This paper introduces a class of network coding based on LDPC code for a cooperative network and extends it to multi-hop network.
首先提出适用于上行链路的网络编码协作分集方案，核心思想就是赋予中继具有对来自不同用户的信息进行网络编码的功能。
Firstly, we propose a network-coded cooperative diversity plan on uplink, whose core idea is to give the network coding function to relay node.
在无线衰落信道环境中，协作中继是一种增加额外分集增益的有效方法，而网络编码可以用来提高网络吞吐量。
In the wireless fading channel environment, cooperative relaying is an effective way to increase additional diversity gain, and network coding can be used to increase network throughput.
由于中继节点的参与，该协议可充分利用多用户协作的空间分集和出错重传所带来的时间分集和编码增益。
As the relay node's involvement, the agreement can take full advantage of multi-user cooperative spatial diversity and the time diversity and coding gain from retransmission mechanism.
该方案的主要特征是，认知中继使用的协作机制结合了协作传输和协作中继，可以获得空间分集和频谱分集增益。
The key feature of the proposed scheme is that, the cognitive relay combines cooperative transmission and cooperative relay, as a result, both spatial diversity and spectrum diversity can be obtained.
多中继感知协作通信技术是无线通信领域中，利用时空分集提升网络吞吐量的热门研究方向。
It is already theoretically presented in previous work that multiple cognitive relay improves the throughput of cognitive networks by increasing diversity in both spatial and temporary domain.
多中继感知协作通信技术是无线通信领域中，利用时空分集提升网络吞吐量的热门研究方向。
It is already theoretically presented in previous work that multiple cognitive relay improves the throughput of cognitive networks by increasing diversity in both spatial and temporary domain.
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