| 宽带无线接入系统的上行定时算法改进 |
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| 引用本文： | 郑祥,陈健,金彦亮.宽带无线接入系统的上行定时算法改进[J].上海大学学报(自然科学版),2008,14(6):564-567. |
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| 作者姓名： | 郑祥 陈健 金彦亮 |
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| 作者单位： | (上海大学 通信与信息工程学院，上海 200072) |
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| 摘 要： | 对基于IEEE 802.16e-OFDMA的宽带无线接入系统的上行定时算法进行改进.该算法采用了测距信号的时域叠加方法，增强其在频域的信噪比，提高在低信噪比情况下用户接入和时延估计的性能.仿真结果表明，在信噪比较低的情况下，该算法相对于原有算法在用户检测性能和时延估计性能方面均有改善，提高了小区边缘用户的上行随机接入性能.
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| 关 键 词： | 测距 宽带无线接入系统 随机接入信道 |
| 收稿时间： | 2007-07-10 |
Improved Algorithm for Uplink Timing in Broadband Wireless Access Systems |
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| ZHENG Xiang,CHEN Jian,JIN Yan-liang.Improved Algorithm for Uplink Timing in Broadband Wireless Access Systems[J].Journal of Shanghai University(Natural Science),2008,14(6):564-567. |
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| Authors: | ZHENG Xiang CHEN Jian JIN Yan-liang |
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| Institution: | (School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China) |
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| Abstract: | An improved algorithm of random access channel(RACH)in broadband wireless access systems based on IEEE 802.16e-OFDMA is proposed. By combining the ranging signal in the time domain, the algorithm enhances the SNR of correlation in the frequency domain, and is more robust in the ranging user detection and delay estimation at low SNR. Simulation results show that the proposed algorithm improves the performance of ranging user detection and delay estimation at low SNR, and enhances the performance of edge users.
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| Keywords: | random access channel(RACH) ranging broadband wireless access system |
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