| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost multiband radiocommunication system which can get a wide range of a frequency diversity effect. SOLUTION: A transmitter 101 has a serial/parallel converter 1, a direct diffuser 2 which performs direct diffusion to the output data, a synthesizer 3 which synthesizes the outputs of the direct diffuser, a transmission system common IF 4 which converts the output signal of the synthesizer into common middle frequency, a transmission system RF 5 which individually converts the output signal into (n) pieces of carrier frequency bands, and a transmission system antenna 6. A receiver 201 has a receiving system antenna 7, a receiving system RF 8 which converts the frequency of input signals into a common middle frequency band separately for each frequency band, a receiving system common IF 9 which converts the frequency of the output into base band signals en block, and a reverse diffuser 10 which separates the signal in each band by performing (n) ways of reverse diffusion in the same diffusion train as the transmitter to the output. |
