| 摘要 |
PROBLEM TO BE SOLVED: To obtain a radio relay method, a radio apparatus and a radio relay system which can perform radio communication by suppressing the influence of interference waves using a low-cost constitution, without the transmission speed deteriorating. SOLUTION: An RF signal containing a signal of a first frequency f1 and/or a second frequency f2 is received, the received RF signal is mixed with one or more signals of a local oscillation frequency fLO, the signal of the frequency f1 or f2 is converted into a signal of an intermediate frequency fIF, the signal of the frequency fIF is mixed with one of more signals of the frequency fLO, and the mixed signal is converted into a signal of the frequency f1 or f2, which is different from the frequency before conversion to the fIF and has a relation of the formula 1 to transmits the converted signal, where fLOk is the k-th local oscillation frequency (k =1, 2, 3, ..., n) and n is a natural number. COPYRIGHT: (C)2008,JPO&INPIT |
