| 摘要 |
PROBLEM TO BE SOLVED: To attain high-speed communication by providing a multiplexer means that multiplexes differential data and a data stream whose spread period is deviated to a transmission section and providing a demultiplexer processing means to a reception section. SOLUTION: A 1st conversion means 1 of a transmission section converts serial data into parallel data, a multiplexer means 2 uses a reference clock 5 to multiplex differential data and a data stream whose spread period is deviated, and a multiplier means 3 multiplies an output signal of the means 2 with a carrier signal. A multiplier 13 of a reception section multiplies received data, via a band-pass filter with a carrier signal from a sine wave generating means 12, and a multiplier means 15 multiplies outputs (I, Q) of a DQPSK matched filter 14. A waveform-shaping means 16 applies amplification, detection and waveform shaping to the multiplied waveform. A demultiplexer processing means 7 demultiplexes the multiplexed data, respectively outputs I, Q of the means 16 into regular data sequence as parallel data, and a 2nd conversion means 17 converts the parallel data into serial data. |
