【摘要】：研究適用于無線信道測量的定時偏移和信道聯(lián)合估計方法.發(fā)射機發(fā)送具有循環(huán)前綴結構的導頻信號段.接收機根據(jù)粗同步信號確定快速傅里葉變換的窗口起始位置.利用改進時域最小二乘信道估計和變換域濾波,獲得高精度的信道估計值.對頻域接收導頻信號段的定時偏移進行精細估計,對定時偏移量進行濾波并累加.最后,對頻域接收導頻信號段進行定時偏移補償.信道估計器、定時延遲偏移精細估計器與補償單元三者構成迭代相干延遲鎖定環(huán)路.仿真結果表明:采用迭代相干聯(lián)合估計方法進行精細定時延遲估計的性能明顯優(yōu)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.
【作者單位】： 東南大學毫米波國家重點實驗室;
【基金】：國家自然科學基金(61132003) 國家重點基礎研究(973)計劃(2013CB329002) 江蘇省自然科學基金(BK2011019,BK20130631) 國家科技重大專項(2014ZX03004006-005)
【分類號】：TN92

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相關期刊論文 前3條

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