KR930022840A

KR930022840A - Multiphase Cancellation Transceiver

Info

Publication number: KR930022840A
Application number: KR1019920007187A
Authority: KR
Inventors: 박형모
Original assignee: 이헌조; 주식회사 금성사
Filing date: 1992-04-28
Publication date: 1993-11-24

Abstract

본 발명은 다중상제거 송수신 장치에 관한 것으로, 종래에는 GCR(Ghost Cancelling Reference)발생부에서 8필드 모두 사용하여 시간변화 특성을 갖는 방송 채널에서 채널 특성을 잘못 인식하여 다중상감쇄부에서 잘못된 연산을 하므로 제품의 성능을 저하시키는 문제점이 있었다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-phase cancellation transmission / reception apparatus. In the related art, a miscellaneous operation is performed in a multi-phase attenuator by incorrectly recognizing channel characteristics in a broadcast channel having time varying characteristics by using all eight fields in a GCR (Ghost Canceling Reference) generation unit. Therefore, there was a problem in lowering the performance of the product.

본 발명은 상기와 같은 문제점을 감안하여 주파수는 같고 위상이 90°차이나는 두개의 반송파를 각기 다른 신호로 진폭 변조하는 직각진폭변조부 및 복조부를 장착하고 각기 다른 신호로 보상하는 두 보상부를 장착하여 4필드만을 사용으로 반송채널특성을 정확하게 인식하여 제품의 성능을 향상하는 효과가 있다.In view of the above problems, the present invention is equipped with a quadrature amplitude modulator and a demodulator for amplitude modulating two carriers having the same frequency and having a phase difference of 90 ° with different signals, and having two compensation parts for compensating with different signals. By using only four fields, it is effective to recognize the characteristics of the carrier channel and improve the performance of the product.

Description

Multiphase Cancellation Transceiver

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명의 다중상제거 송수신장치 구성도, 제3도의 (가)내지 (다)는 종래 및 본 발명의 부분별 동작 파형도.2 is a block diagram of a multi-phase elimination and reception device of the present invention, and (a) to (c) of FIG. 3 are conventional and partial operation waveform diagrams of the present invention.

Claims

Quadrature amplitude which is amplitude modulated by GCR generator 1 and 11 and GCR generator 1 and 11 that generate two carriers of the same frequency and 90 ° out of phase The sideband by receiving the modulation 12, the output signal of the quadrature amplitude modulator 12, the adder 2 for adding the video signal and the video signal Is, and the output signal of the adder 2; Of the residual sideband modulator 3 for suppressing and modulating a part of the intermediate frequency modulator 3, the intermediate frequency modulator 4 for intermediate frequency modulating the output signal of the residual sideband modulator 3, and the intermediate frequency modulator 4 of the intermediate frequency modulator 4; Multi-phase elimination transmitter consisting of a high frequency modulator (5) for transmitting the output signal to the air through the antenna (AT1) after modulating the output signal to a high frequency capable of wireless transmission

A high frequency demodulator 6 for demodulating the high frequency radio signal through an antenna AT2, an intermediate frequency demodulator 7 for demodulating the output signal of the high frequency demodulator 6, and a middle frequency thereof Residual sideband demodulation section 8 for demodulating a signal modulated by suppressing a part of any sideband by receiving the output signal of demodulation section 7, and performing right-angle amplitude demodulation of the signal of the residual sideband demodulation section 8; The compensation unit 14 and 15 for receiving and applying the rectilinear amplitude demodulation unit 13 and the output signal of the quadrature amplitude demodulation unit 13, the compensation unit 14 and 15, and the residual side wave, respectively. A multi-phase elimination receiver (9) comprising a multi-image attenuator (9) for receiving an output signal of the large demodulation unit (8) and outputting an image signal (Is) after removing the multi-phase.

※ Note: The disclosure is based on the initial application.