| 摘要 |
<p>The present invention relates to a superheterodyne RF repeater and a relay method, which can maximally utilize a normal cyclic prefix (CP) with a time of 4.7µs in a long term evolution (LTE) orthogonal frequency division multiple access (OFDMA) mobile communication system. A relay device for the mobile communication system, according to one aspect of the present invention, is a relay device for superheterodyne amplification, comprising: a frequency-down converter for converting a received signal of a high frequency band into a signal of a intermediate frequency band; an IF filter for performing filtering so as to obtain a signal of a desired intermediate frequency band from the signal of the converted intermediate frequency band; and a frequency-up converter for converting the signal of the intermediate frequency band outputted from the IF filter into the signal of the high frequency band, wherein the frequency-down converter converts the signal of the high frequency band into the signal of the intermediate frequency band over 500MHz and outputs the converted signal, and the IF filter can be a filter having a time delay below 1µs.</p> |
