空时编码包括三种：空时网格编码(STTC)、空时分层编码(LST)和空时分组编码(STBC)。

Space-time coding includes space-time trellis coding (STTC), layered space-time coding (LSTC) and space-time block coding (STBC).

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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.

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