| 摘要 |
A transmitter 100 transmits an orthogonal frequency division multiplexing (OFDM) signal. A control unit 104 receives a group of input symbols (X0 to XN-1) based on which the transmitted signal is to be generated. The control unit selects, from among a plurality of available allocations of input symbols to sub-carriers, one allocation to apply to the received group of input symbols. Each available allocation serves to allocate the input symbols to respective sub-carriers in a different way from each other available allocation. The allocation selection is based on predicted values of a predetermined property, e.g. a peak-to-average power ratio (PAPR), of the transmitted signal for different available allocations. The available allocations may be different rotations. Further elements 102, 14, 16 of the transmitter generate the transmitted signal using the selected allocation.
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