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网格正交频分复用系统凭借其特殊的网格时频结构和更大的欧式距离特性,在快速移动环境下展现了卓越的抗时变、抗多径能力,其可改善数据链路在快速移动场景下的适应性和接入能力,然而就具体应用而言,信道估计是其必须解决的关键问题之一。在对Lattice-OFDM系统及其信道估计问题分析的基础上,分别介绍了Lattice-OFDM系统时域和频域信道响应估计方法,并分析讨论了其最大多普勒扩展和最大时延扩展等信道散射参数估计实现,同时结合Lattice-OFDM收发信机实现给出了相应的应用建议。
Grid Orthogonal Frequency Division Multiplexing system, with its special grid time-frequency structure and larger Euclidean distance characteristics, exhibits excellent anti-time-varying and multi-path capability in fast moving environment, which can improve the data link Adaptability and access capabilities in fast-moving scenarios, however, channel estimation is one of the key issues that it has to address for specific applications. Based on the analysis of Lattice-OFDM system and its channel estimation problem, the channel estimation methods of Lattice-OFDM system in both time domain and frequency domain are introduced respectively. The channels such as the maximum Doppler spread and the maximum delay spread are analyzed and discussed. Scattering parameter estimation, combined with the realization of Lattice-OFDM transceiver to give the corresponding application recommendations.