中文摘要：

无线传输系统中，发射机利用来自接收机反馈的信道信息，构成闭环无线系统．闭环无线系统的关键是反馈方案的设计，而反馈的关键是优化的码本设计，能在给定反馈复杂度的基础上进一步提高无线传输性能．本文分析了这一领域的研究进展，提出基于向量空间分布的有限反馈码本，分析了这种码本的原理和相应算法，并比较了它与现有码本在闭环无线系统中的传输性能．仿真结果表明，相比于现有的码本，本文提出的“基于向量空间分布的码本”能够获得更低的无线传输差错概率及更高的信道容量，将无线系统的传输性能提高1～2dB．

英文摘要：

In close-loop wireless communication systems, when the transmitter obtains the instant channel information by a feedback link from the receiver, benefits of improving performance for wireless system can be realized. The key point for feedback used in close-loop wireless system is optimal codebook which can achieve better performance with certain feedback complexity. Analysis on this issue is presented in this paper. And a limited codebook based on distribution of vector is proposed. Principle and algorithms of this codebook are detailed. Consequently performance comparison on these codebooks is done. Simulation results show that the comparing to current codebooks, the proposed ＂vector distribution based codebook＂ can obtain lower error rate for wireless transmission and higher capacity, enhancing performance of wireless system by 1 - 2 dB.