Link Adaptation and Precoding For 8TX Codebook in LTE-A System
| Autor: | Yi-Rung Chen, 陳奕榮 |
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| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 In this paper we propose an efficient algorithm for the calculation of the feedback signal, feedback signal comprising of the so-called rank indicator (RI), precoding matrix indicator (PMI), and channel quality indicator (CQI) at LTE system, which respectively denote as the number of spatial streams, codebook index of precoding matrix, and SINR information. In order to reduce the computational complexity, we will decomposes the problem into two steps. First step is jointly evaluating the PMI and RI, followed by analysis of choosing the CQI. The problem is divided into these two steps, and then propose some algorithms to reduce the complexity of computing PMI. The first method is a majority vote, the second method is channel average (mean mutual information) and the third method is a reference signal. By the above way to find out by PMI and RI, and further discuss the impact of CQI. With choosing the CQI value to achieve a target constraints (BLER ≤ 0.1) .Through the above approach, trying to figure out best possible performance. Simply put, analysis by computer simulation approach proposed algorithm, which we hope to be able to reduce the algorithm complexity effectively and without excessive loss of throughput. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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