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Receiving system for television receiver

A technology for receiving systems and televisions, applied in parts of television systems, parts of televisions, and color televisions, etc., can solve problems such as high noise, deteriorated performance, and increased noise, and achieve the effect of improving system performance.

Inactive Publication Date: 2008-01-16
LEIJIN ELECTRONIC SHENYANG CO LTD
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Problems solved by technology

Moreover, (b) is the signal spectrum equalized in the frequency domain; although the signal spectrum is consistent with the ideal signal, but before compensation, the noise in the small part of the signal spectrum becomes larger
When the frequency-domain equalized signal is reconverted into a time-domain signal, although the attenuation is compensated, due to the noise added in a specific frequency range, the entire signal is increased by noise, resulting in poor performance

Method used

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  • Receiving system for television receiver
  • Receiving system for television receiver
  • Receiving system for television receiver

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Embodiment Construction

[0023] Fig. 4 is a diagram of a receiving system related to the present invention. As shown in Fig. 4, the receiving system is composed of the following parts, namely: a demodulator (demodulator) (10) is provided, which will decode the received RF signal through processes such as carrier / synchronization (carrier / timing) recovery Tuned into a base-band signal; equipped with a frequency domain equalizer (frequency domain equalizer) (11), which will compensate for various attenuations (fading) that occur between the transmitter and the receiver; provided with noise A canceller (12), which is connected to the frequency domain equalizer (11), will eliminate the noise occurring in the signal passing through the frequency domain equalizer (11).

[0024] FIG. 5 is a detailed block diagram of the noise canceller of the receiving system of FIG. 4. FIG. As can be seen from Fig. 5, the input value is a signal converted to the time domain output by the frequency domain equalizer (11) of F...

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Abstract

The receiving system eliminates increment of noise generated in system of using equalizer in frequency domain. The disclosed receiving system is composed of following parts: demodulator for converting and recovering signal in radio frequency received from transmitting system; equalizer in frequency domain for compensating attenuation being occurred between transmitting system and receiving system; noise killer for eliminating increment of noise generated in equalizer in frequency domain.

Description

technical field [0001] The present invention relates to a receiving system, and more particularly to a receiving system of a television set which cancels the noise increase which occurs in the frequency domain equalizer. Background technique [0002] When the digital transmission system commonly used now and the ATSC 8VSB transmission system as the digital television (DTV) transmission method for the United States, and the transmission system using PAM or QAM are transmitted by air wave or cable, these transmitted signals will be It is reflected by multiple reflectors, so what is received is a signal mixed by these reflections; at this time, since the reflected component will distort the original signal, the original signal cannot be obtained only with the received signal. Therefore, an equalizer (equalizer) is used to compensate for components that distort the signal transmitted between the transmitter and receiver (ghost: ghost, or fading: attenuation). [0003] The equal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/44H04N5/455
Inventor 金佑灿
Owner LEIJIN ELECTRONIC SHENYANG CO LTD
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