宽带无线信道精细时延和响应联合估计方法
发布时间：2019-03-11 18:53
【摘要】：研究适用于无线信道测量的定时偏移和信道联合估计方法.发射机发送具有循环前缀结构的导频信号段.接收机根据粗同步信号确定快速傅里叶变换的窗口起始位置.利用改进时域最小二乘信道估计和变换域滤波,获得高精度的信道估计值.对频域接收导频信号段的定时偏移进行精细估计,对定时偏移量进行滤波并累加.最后,对频域接收导频信号段进行定时偏移补偿.信道估计器、定时延迟偏移精细估计器与补偿单元三者构成迭代相干延迟锁定环路.仿真结果表明:采用迭代相干联合估计方法进行精细定时延迟估计的性能明显优于非相干方法.
[Abstract]:The timing offset and joint channel estimation methods for wireless channel measurement are studied. The transmitter transmits a pilot signal segment with a cyclic prefix structure. The receiver determines the starting position of the fast Fourier transform window according to the coarse synchronous signal. The improved time-domain least squares channel estimation and transform domain filtering are used to obtain high-precision channel estimation. The timing offset of the received pilot signal segment in the frequency domain is precisely estimated, and the timing offset is filtered and accumulated. Finally, the timing offset compensation is carried out for the frequency domain received pilot signal segment. Channel estimator, timing delay offset fine estimator and compensation unit constitute iterative coherent delay locking loop. The simulation results show that the performance of the iterative coherent joint estimation method for fine timing delay estimation is obviously better than that of the non-coherent method.
【作者单位】： 东南大学毫米波国家重点实验室;
【基金】：国家自然科学基金(61132003) 国家重点基础研究(973)计划(2013CB329002) 江苏省自然科学基金(BK2011019,BK20130631) 国家科技重大专项(2014ZX03004006-005)
【分类号】：TN92
[Abstract]:The timing offset and joint channel estimation methods for wireless channel measurement are studied. The transmitter transmits a pilot signal segment with a cyclic prefix structure. The receiver determines the starting position of the fast Fourier transform window according to the coarse synchronous signal. The improved time-domain least squares channel estimation and transform domain filtering are used to obtain high-precision channel estimation. The timing offset of the received pilot signal segment in the frequency domain is precisely estimated, and the timing offset is filtered and accumulated. Finally, the timing offset compensation is carried out for the frequency domain received pilot signal segment. Channel estimator, timing delay offset fine estimator and compensation unit constitute iterative coherent delay locking loop. The simulation results show that the performance of the iterative coherent joint estimation method for fine timing delay estimation is obviously better than that of the non-coherent method.
【作者单位】： 东南大学毫米波国家重点实验室;
【基金】：国家自然科学基金(61132003) 国家重点基础研究(973)计划(2013CB329002) 江苏省自然科学基金(BK2011019,BK20130631) 国家科技重大专项(2014ZX03004006-005)
【分类号】：TN92
【参考文献】
相关期刊论文 前3条
1 李颖哲;王萍;勾天杭;孙坤;常若艇;;散射环境下宽带移动通信衰落信道扩展模型[J];电波科学学报;2009年06期
2 张念祖;洪伟;王海明;周健义;杨广琦;张慧;余晨;蒯振起;李林盛;张雷;于志强;陈继新;陈U，
本文编号：2438529
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