KR940027343A - Training Sequence Detector - Google Patents

Abstract

The present invention relates to a modem receiver, and more particularly, to a training sequence detector for detecting a section in which a training sequence is alternately transmitted by a receiver.

The training sequence detector using the bandpass filter at the receiver of the modem is complicated in construction and requires a lot of computation during digital processing. Also, the training sequence is different depending on the transmission speed of the modem. In order to solve the problem, a correlation detector is used to accurately detect a portion where a training sequence is alternately transmitted, thereby simplifying computation during digital processing and adaptively detecting a training sequence according to a transmission speed.

Description

Training Sequence Detector

Since this is an open matter, no full text was included.

4 is a block diagram of a training sequence detector according to the present invention.

Claims (7)

A training sequence detector, comprising: correlation detection means for inputting a received signal to detect and output a correlation, and receiving a correlation detection value output from the correlation detection means and comparing the threshold value to detect a training sequence Training sequence detector, characterized in that consisting of training detection means. The in-phase correlation detecting unit (21) according to claim 1, wherein the correlation detecting unit (1) inputs an in-phase signal to detect and output a correlation, and a quadrature (10) to input and output a quadrature signal to detect and output a correlation. Correlation detection unit 22, the in-phase correlation detection signal output from the in-phase correlation detection unit 21, and the correlation coefficient for adding the quadrature correlation detection signal output from the quadrature correlation detection unit 22. A training sequence detector comprising an adder (23) for outputting a detected value. 2. The determining unit (31) according to claim 1, wherein said training detecting means includes: a determining unit (31) for receiving a correlation detected value output from said correlation detecting means and generating a count pulse by comparing with a threshold value; And a counter (32) for outputting a training sequence confirmation signal by counting a predetermined value by inputting a count pulse outputted from the < RTI ID = 0.0 > A training sequence detector comprising: demodulation means for receiving and demodulating a received signal into an in-phase signal and a quadrature phase signal, and inputting and correlating an in-phase signal and a quadrature phase signal separately outputted from the demodulation means; A correlation detecting means for detecting and outputting a figure and a training detecting means for detecting a training sequence by receiving a correlation detection value outputted from the correlation detecting means and comparing it with a threshold value. Ning sequence detector. 5. The in-phase correlation detection unit (21) according to claim 4, wherein said correlation detecting means includes an in-phase correlation detector (21) for inputting an in-phase signal output from said demodulation means, detecting and outputting a correlation degree, and a quadrature signal output from said demodulation means. A quadrature correlation detector 22 that detects and outputs a correlation, and outputs an in-phase correlation detection signal output from the in-phase correlation detector 21 and the quadrature correlation detector 22. A training sequence detector, characterized in that it comprises an adder (23) for outputting a correlation detection value for adding a quadrature correlation detection signal. 5. The determining unit (31) according to claim 4, wherein said training detecting means includes: a determining unit (31) for receiving a correlation detected value output from said correlation detecting means and generating a count pulse by comparing with a threshold value; And a counter (32) for outputting a training sequence confirmation signal by counting a predetermined value by inputting a count pulse outputted from the < RTI ID = 0.0 > 6. The determining unit (31) according to claim 5, wherein the training detecting means (10) includes a determination unit (31) for receiving a correlation detection value output from the adder (23) and generating a count pulse by comparing with a threshold value; 31. A training sequence detector comprising: a counter (32) for inputting a count pulse outputted from (31) to count a predetermined value and outputting a training sequence confirmation signal. ※ Note: The disclosure is based on the initial application.