| 基于比特对数似然比分集的WCDMA系统性能 |
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| 引用本文： | 张莜燕,张长江.基于比特对数似然比分集的WCDMA系统性能[J].计算机仿真,2010,27(1):342-345. |
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| 作者姓名： | 张莜燕 张长江 |
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| 作者单位： | 浙江师范大学数理与信息工程学院,浙江,金华,321004 |
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| 基金项目： | 浙江师范大学省基金预研项目(KJ20070432);;浙江师范大学青年基金项目(KJ20060119) |
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| 摘 要： | 研究比特对数似然比（BLLR）的天线分集是误比特率性能优于传统信噪比（SNR）天线分集的一种新技术,对组合空时分组码、2D-RAKE接收机和基于BLLR分集技术的MQAMWCDMA系统在相关MIMO Nakagami衰落信道上的误比特率性能进行蒙特卡洛仿真研究,并推导了接收相关的Nakagami衰落信道上采用BLLR检测的16QAM WCDMA系统平均误比特率的解析表达式。仿真结果表明,理论推导与仿真结果相吻合。对于BLLR的广义选择合并分集技术的系统误比特率性能优于SNR的广义选择合并系统;选取的可分离路径数越多系统性能越好,而平均路径强度的衰减速率越小,误比特率性能越好。
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| 关 键 词： | 比特对数似然比 天线分集 相关衰落信道 空时分组码 |
Performance of WCDMA systems Based on Bit Log-likelihood Ratio Antenna of Diversity |
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| ZHANG You-yan,ZHANG Chang-jiang.Performance of WCDMA systems Based on Bit Log-likelihood Ratio Antenna of Diversity[J].Computer Simulation,2010,27(1):342-345. |
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| Authors: | ZHANG You-yan ZHANG Chang-jiang |
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| Affiliation: | College of Mathematics/a>;Physics and Information Engineering/a>;Zhejiang Normal University/a>;Jinhua Zhejiang 321004/a>;China |
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| Abstract: | The antenna diversity based on bit log-likelihood ratio(BLLR) is a new technology which is better than that based on signal-to-noise ratio(SNR) in performance.The BER performance of MQAM WCDMA system combined with space-time block coding(STBC),2D-RAKE receiver and bit log-likelihood ratio antenna diversity on correlated Nakagami fading channels has been investigated.Analytical expressions for the BER of 16QAM WCDMA system based on bit log-likelihood ratio approach over receiver correlated Nakagami fading ch... |
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| Keywords: | Bit log-likelihood ratio Antenna diversity Correlated fading channels Space-time block coding |
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