| 摘要 |
A transmitter has a mapping unit mapping transmitting symbol data to a plurality of phase amounts, and a phase rotating process unit giving a phase rotation to the transmitting symbol data mapped to the phase amounts to generate a polyphase modulated signal. A receiver has an inter-chip phase difference detecting unit detecting a phase difference between a received signal and a signal received one chip unit time before at each chip unit time, an averaging process unit averaging phase differences detected at respective chip unit times for one symbol time, and an deciding unit deciding an output from the averaging process unit and demodulating the polyphase modulated signal. The symbol error rate can be improved without an error correction circuit.
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