In Impulse-Radio or DS/SS UWB communications, a prerake scheme has been proposed to achieve diversity while reducing computational complexity in a mobile terminal. On the other hand, in an OFDM system, fractional sampling (FS) has been proposed to achieve path diversity with a single antenna. However, in the FS-OFDM system, it is necessary to oversample a received signal that leads to larger power consumption in the terminal side. In this paper, a precoded transmit path diversity scheme in an OFDM system has been proposed. The proposed scheme can achieve path diversity without oversampling the received signal.
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机译:在脉冲无线电或DS / SS UWB通信中,已经提出了预瑞克(prerake)方案以实现分集,同时降低移动终端中的计算复杂度。另一方面,在OFDM系统中,已经提出了分数采样(FS)以利用单个天线实现路径分集。然而,在FS-OFDM系统中,必须对接收到的信号进行过采样,这导致终端侧的功耗更大。本文提出了一种OFDM系统中的预编码传输路径分集方案。所提出的方案可以实现路径分集而不会对接收信号进行过采样。
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