Patent ID: 8094603

Claim:
A modulating apparatus of an on-channel repeater which receives a signal on one channel and distributes the signal on the same channel, comprising: a baseband signal configuring means for configuring a baseband signal by combining an input field and a segment sync signal; a pilot adding means for adding a pilot signal to the baseband signal; an up-sampling means for up-sampling the baseband signal with the pilot signal added thereto; a filtering means for filtering the up-sampled baseband signal with the pilot signal added thereto, wherein the filtering means generates an in-phase (I) signal and a quadrature (Q) signal and performs filtration; a first digital-to-analog converting means for converting the filtered in-phase (I) signal into a first analog signal; a second digital-to-analog converting means for converting the filtered quadrature (Q) signal into a second analog signal; a first radio frequency (RF) up-converting means for directly up-converting the first analog signal into a first RF signal; a second radio frequency (RF) up-converting means for directly up-converting the second analog signal into a second RF signal; an adding means for adding the up-converted first and second analog signals; wherein the filtering means uses a window method using window functions of Kaiser, Hamming, Hanning, and Blackman.