Patent ID: 8238820

Claim:
An on-channel repeater, comprising: a receiver for receiving radio frequency (RF) signals; a subtractor for subtracting replica from output signals of the receiver to thereby produce output signals of the subtractor; a repeating process unit for performing a repeating process onto the output signals of the subtractor, wherein the repeating process unit includes: a demodulator for demodulating the output signals of the subtractor; an equalizer for equalizing the demodulated signals; and a modulator for modulating the equalized signals; a replica generator for calculating replica based on the output signals of the subtractor and the signals obtained after repeating process performed thereon and feeding the replica back to the subtractor; and an identification (ID) signal generating and adding unit for generating ID signals having correlation characteristic, and adding the ID signals to signals obtained in the equalizer after removing noise, multipath signals, and remaining feedback signals that are caused on a transmission path between a main transmitter and the on-channel repeater , wherein the ID signal generating and adding unit adds the ID signals to the signals outputted from the equalizer based on Equation 4, which is expressed as: t ( n )= eq ( n )+α· v ( n ) Eq. 4 where t(n) denotes an output signal of the ID generating and adding unit; v(n) denotes an ID signal; eq(n) denotes a signal outputted from the equalizer; and α denotes a constant determining an addition size of the ID signal.