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    ON-CHANNEL REPEATING APPARATUS AND METHOD
    11.
    发明专利
    ON-CHANNEL REPEATING APPARATUS AND METHOD 未知

    公开(公告)号：CA2697008A1

    公开(公告)日：2009-02-26

    申请号：CA2697008

    申请日：2008-08-20

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： PARK SUNG IK ,  KIM HEUNG MOOK ,  LIM JONG-SOO ,  LEE SOO IN

    IPC: H04B7/14

    Abstract: The present invention relates to an on-channel repeating apparatus and method. An embodiment of the present invention provides an on-channel repeating method including: subtracting a replica of a feedback signal from a signal received from a main transmitter or another repeating apparatus; demodulating and equalizing the signal to remove noise, a multipath signal, and the remaining feedback signal from the signal; inserting identification signal having good correlation properties into the signal; modulating the signal; and transmitting the modulated signal. Another embodiment of the present invention provides an on-channel repeating apparatus including: a unit that converts signals received from a main transmitter or another repeating apparatus into signals in a predetermined band; a unit that generates identification signals having good correlation properties; a unit that generates a replica from the signals in the predetermined band and the identification signal, and then removes a feedback signal; a unit that demodulates a signal from which the feedback signal is removed; a unit that equalizes the demodulated signal to remove noise, a multipath signal, and the remaining feedback signal therefrom; a unit that inserts the identification signal into the equalized signal; and a unit that modulates the signal having the identification signal inserted thereinto and transmits the modulated signal. According to the present invention, the repeating apparatus repeats output signals that have a small time delay and whose distortion is corrected. Therefore, it is possible to improve the utilization of limited frequency sources, and reduce investment in achieving a repeating apparatus.

    ON-CHANNEL REPEATER AND ON-CHANNEL REPEATING METHOD
    12.
    发明专利
    ON-CHANNEL REPEATER AND ON-CHANNEL REPEATING METHOD 未知

    公开(公告)号：CA2686925A1

    公开(公告)日：2008-11-20

    申请号：CA2686925

    申请日：2007-11-09

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： SEO JAE-HYUN ,  EUM HO-MIN ,  PARK SUNG-IK ,  LEE SOO-IN ,  KIM HEUNG-MOOK ,  LIM JONG-SOO ,  LEE JAE-YOUNG ,  LEE YONG-TAE

    IPC: H04B7/14

    Abstract: Provided is an on-channel repeater, which removes feedback signals caused due to low isolation of transmission/reception antennas and a method thereo f. The on-channel repeater includes : a receiver for receiving radio frequen cy (RF) signals and converting them into baseband signals; a subtractor for subtracting replicas of feedback signals from the baseband signals to thereb y produce signals whose feedback signals are primarily removed; a demodulato r for demodulating the signals which include the remaining feedback signals; an equalizer for equalizing the demodulated signals to thereby produce equa lized signals; a transmitter for modulating the equalized signals to thereby produce modulated signals, converting the modulated signals into RF signals , and transmitting the RF signals in the air; a down-converter for down-conv erting the RF signals into baseband signals; and a replica generator for cal culating the replicas based on the baseband signals of the down- converter a nd the signals without feedback signals of the subtractor, and feeding back them to the subtractor.

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