| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the chirp spread spectrum signal multiplexer 10 which more excellent signal transmission is realized under a circumstance where small size, light weight and low power consumption are desired. SOLUTION: In a transmitter of this multiplexer, an adder 103 adds and synthesizes a time division signal distributed from a distributer 101 and a transmission delay signal delayed from the time division signal at a delay device 102 and provides an output of the sum as a transmission sum signal, a chirp filter 104 convolutes the transmission sum signal into a chirp signal and the outputted transmission superimposing signal is modulated by a modulator 105, from which a modulation signal is outputted. A receiver uses samplers 112, 113 to sample a received superimposing signal that is obtained by convoluting the modulation signal with a signal with a reverse characteristic to that of the chirp signal at an inverse chirp filter 110 and a reception delay signal that is obtained by delaying the reception superimposing signal at a delay device 111 respectively to provide an output of sample signals, an adder 114 adds and synthesizes the sample signals and provides an output of the reception sum signal denoting the demodulation reception signal.</p> |
