通过在OFDM通信系统中应用新型差分空时分组码（DSTBC），获得编码增益，无需信道估计。
By using new DSTBC in OFDM communications system channel estimation is nto necessary and coding gain is gotten.
基于OFDM(正交频分复用)系统，提出了一种新的空频时三维编码，将网格编码调制和差分空时分组码进行组合链接设计。
Based on OFDM system, a novel space-frequency-time code which combined trellis-coded modulation with differential space-time block code was proposed.
本文基于一种“单环”相关信道模型，对空时分组码和差分空时码进行了分析和研究。
In this thesis, space-time block coding and differential space-time coding are discussed on the basis of "one-ring" correlated channel model.
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