Method for eliminating same frequency interference of digital TV receiver

A TV receiver and co-channel interference technology, which is applied in the direction of TV, color TV, color TV parts, etc., can solve the problems of receiver performance degradation, digital TV signal co-channel interference, etc., and achieve signal distortion reduction, hardware The effect of less resources and low power consumption

Inactive Publication Date: 2015-03-25
何阳
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problem that the analog signal interferes with the same frequency of the digital TV signal in the prior art, resulting i

Method used

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Embodiment Construction

[0016] A specific embodiment of the present invention is given below.

[0017] The method for eliminating co-channel interference of a digital television receiver is characterized in that it comprises the following steps;

[0018] Step 1. Detect and judge the same-frequency interference signal;

[0019] Step 2. Move and filter the same-frequency interference signal;

[0020] Step 3. Restore the signal power after removing the co-channel interference to the initial value.

[0021] The co-channel interference module is divided into three parts: 1) The detection and judgment module is used to detect whether the received signal contains co-channel interference and its location. Since the same-channel interference has a large amplitude in the frequency domain, Fourier transform (FFT) can be performed on the input signal to convert the time domain signal to the frequency domain for analysis and processing. By comparing the amplitude values ​​of each frequency point, find out the...

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Abstract

Provided is a method for eliminating same frequency interference of a digital TV receiver. The method is characterized by comprising the follow steps: step 1, detecting and determining a same frequency interference signal; step 2, moving and filtering the same frequency interference signal; and step 3, restoring power of the signal which is removed with same frequency interference to an initial value. The method for eliminating same frequency interference of a digital TV receiver effectively reduces same frequency interference of a simulated same frequency signal on the digital receiver, and signal distortion factor is greatly reduced, and the method occupies little hardware resource and is low in power consumption. The method is suitable for large-scale popularization and application.

Description

technical field [0001] The invention belongs to the field of consumer electronics and relates to a method for eliminating co-channel interference of a digital television receiver. Background technique [0002] Analog TV is transmitted by frequency division multiplexing in the form of vestigial sideband amplitude modulation, which is characterized by a clear carrier frequency. [0003] For example, the TV image signal is modulated to the carrier frequency of f1, in order to avoid the main energy area of ​​the image signal, and within the 8 MHz bandwidth, the audio signal is modulated to a frequency of about . f1+6 MHz carrier, and the color subcarrier has a jumping peak at f1+4 MHz, which changes with the color saturation of the image. And digital TV uses MPEG 2 transmission stream to carry out amplitude modulation, phase modulation or combination of amplitude modulation and phase modulation on the high-frequency carrier through channel coding to form a digital TV signal, an...

Claims

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Application Information

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IPC IPC(8): H04N5/21H04N5/44
Inventor 何阳
Owner 何阳
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