【摘要】 提出了一种采用不等长分组的正交频分复用 ( OFDM)系统 .该系统通过将相邻的 OFDM分组编码成不同的长度 ,可在接收信号序列中引入周期平稳性 ,从而实现信道的盲辨识 .由于采用这种方法无需加入冗余信息 ,故进一步提高了系统的传输效率 .仿真结果表明 ,本方法是可靠的更多还原

【Abstract】 By precoding the successive orthogonal frequency division multiplexing (OFDM) blocks with unequal sizes, a cyclostationarity is introduced in the received signals, so the channel can be identified blindly. By this way, no redundant signals are added, and the bandwidth efficiency of OFDM system is further increased. The simulation results show its effectiveness.更多还原