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Method of processing abnormal modulation signal, and receiver having abnormal modulation signal compensation function

A modulation signal and receiver technology, applied in the field of receivers with abnormal modulation signal compensation function, can solve the problems of undetectable pilot signal, lost audio signal, etc.

Inactive Publication Date: 2008-10-01
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Specifically, if the modulated signal is transmitted with weak power, the pilot signal cannot be detected and the audio signal itself will be lost

Method used

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  • Method of processing abnormal modulation signal, and receiver having abnormal modulation signal compensation function
  • Method of processing abnormal modulation signal, and receiver having abnormal modulation signal compensation function
  • Method of processing abnormal modulation signal, and receiver having abnormal modulation signal compensation function

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Embodiment Construction

[0036] image 3 It is a flowchart of a method for processing an abnormal modulation signal according to an exemplary embodiment of the present invention.

[0037] Referring to FIG. 2, an analog input signal is received, and a baseband signal is generated by demodulating the analog input signal using demodulation parameters corresponding to a normal demodulation mode. In this case, the analog input signal may be a signal modulated in a normal modulation mode or an abnormal modulation mode. The analog input signal can be an amplitude modulated sound intermediate frequency (SIF).

[0038] If a baseband signal is generated, the baseband signal is sampled at a sampling rate, and the number of samples whose amplitude is greater than a threshold level during the detection window is counted in operation S310. The sampling rate can be predetermined. Detection windows can be scheduled. The faster the sampling rate used in the sampling process, the more accurate the sampling and the ...

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Abstract

A method of detecting an abnormal modulation signal, and a receiver for compensating for an abnormal modulation signal are provided. The method includes demodulating an analog input signal, which has been modulated according to modulation parameters, using demodulation parameters corresponding to the modulation parameters to generate a baseband signal; sampling the baseband signal at a sampling rate; counting a number of samples having an amplitude greater than a threshold level during a detection window; and determining whether the analog input signal has been abnormally modulated, based on the number of samples counted. The receiver includes a baseband signal generator; a sampler; an abnormal modulation detector which counts a number of samples and determines whether the analog input signal has been abnormally modulated; a demodulation parameter modifier which modifies the demodulation parameters according to the determination result.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2007-00031138 filed with the Korean Intellectual Property Office on March 29, 2007, the contents of which are incorporated herein by reference. technical field [0003] The method and device in accordance with the present invention relate to a receiver for receiving modulated signals, more specifically, to detect and process abnormally modulated signals modulated by non-standard modulation parameters, and a receiver with a compensation function for abnormally modulated signals. Background technique [0004] According to the progress of electronic engineering, various modulation and demodulation methods for transmitting signals over long distances have been developed. Modulation is a technique for reducing distortion of a communication signal and expanding a transmittable area by converting a communication signal into a high frequency band by using a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/44H04N5/00
CPCH03D3/007H04N5/04H04N5/44H04N5/50
Inventor 宋永锡李命九
Owner SAMSUNG ELECTRONICS CO LTD