應用於相關性通道具位元配置有限回授系統之傳送器設計

Abstract

在本篇論文中，我們提出一個多輸入多輸出有限回授具位元配置系統 在萊斯通道。首先我們推算出能使系統達到最小錯誤率的最佳位元與 功率配置。接著我們根據相關性通道的統計特性設計出最佳的統計傳 送器達到最小化錯誤率上限。我們考慮線性接收器與判定回授接受器。 模擬結果我們顯示我們所提出的系統可以用較少的回授位元達到低 錯誤率。

In this thesis, we design statistical precoder for precoded MIMO systems over correlated Ricean channels with limited feedback of bit allocation. We assume a reverse link of very low rate is available so that the receiver can send back the index of BA vector chosen from a codebook known to both transmitter and receiver. Furthermore we assume the correlated channel is slow fading and the statistics of the channel are known to the transmitter. Based on statistical of the channel, we derive the optimal statistical precoder so that bounds of the BER averaged over the random correlated channel is minimized. We will consider both linear and decision feedback receivers in the design of bit allocation codebook. The distribution of the bit allocation is taken into consideration. As a result, a nice tradeoff between performance and feedback rate can be achieved for correlated channels. Simulations show very good performance can be achieved when optimal precoder is used.