| 摘要 |
<p>A time-frequency spreading method in OFDMA system is provided. The method includes: the transmission message is transformed to one or more modulation signal vector, and every bit of the transmission message is spread to all vector elements of a modulation signal vector; mapping one or more modulation signal vector to the set of time-frequency grids, and in OFDMA time-frequency plane, the two grids to which any two vector elements in every modulation signal vector are mapped have not the same time and frequency locations. In addition, the time-frequency spreading apparatus in OFDMA system is provided.</p> |
