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Channel balancer and digital TV receiver using the same

A technology of digital TV reception and channel equalizer, applied in TV, transmitter/receiver shaping network, color TV, etc.

Inactive Publication Date: 2004-05-12
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, as the need to equalize time-domain propagation in terrestrial television receivers increases, so the extension of the time-domain length using the equalization filter is limited in implementation

Method used

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  • Channel balancer and digital TV receiver using the same
  • Channel balancer and digital TV receiver using the same
  • Channel balancer and digital TV receiver using the same

Examples

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Embodiment Construction

[0033] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the invention will be described in detail, examples of which are illustrated in the accompanying drawings.

[0034] The present invention performs channel equalization of terrestrial television signals in the frequency domain by means of a vestigial sideband system.

[0035] figure 1 A block diagram showing the overall structure of the channel equalizer according to the present invention is illustrated, the channel equalizer includes a channel unit 100 arranged at the transmitting end and the receiving end, and a frequency domain channel equalizing unit for slave 100 adds white noise to a terrestrial television reception signal to restore the original signal.

[0036] The channel unit 100 includes an adder 120 which adds white noise w(n) to the terrestrial television reception signal x(n) which has passed through the multiplex channel 110, and the white noise-added terrestrial television rec...

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PUM

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Abstract

A channel equalizer of a terrestrial digital TV receiver using a VSB modulation method is disclosed. By using a precise channel estimator according to the LS method, the transmission channel can be precisely estimated regardless of the characteristic of the transmission channel. By performing the channel equalization in the frequency domain based on the estimated channel, since the channel can be precisely compensated for, and a firm frame synchronization is supplied even to the time-varying multiple path channel, it can be exhibited superior performance even a mobile channel. Moreover, since the FFT implemented by hardware simpler than the transversal filter of the time domain can be used, the equalization is performed not the time domain but the frequency domain, a longer equalizing range can be obtained.

Description

[0001] This application claims priority from Korean application P2002-45575 filed on Aug. 1, 2002, which is hereby incorporated by reference. technical field [0002] The present invention relates to a channel equalizer in a terrestrial digital television (TV) receiver using vestigial sideband (VSB) modulation. Background technique [0003] Typically, a terrestrial television (TV) signal transmitted from a transmitter using a vestigial sideband (VSB) system arrives at a receiver after passing through multiple channels. However, the arriving signal is severely distorted by Inter Symbol Interference (ISI), so a channel equalizer should be used to remove the interference and restore the original signal. [0004] There is a non-linear decision feedback equalizer as the most adopted channel equalizer in receivers for single carrier transmission systems such as the current VSB system. Since the nonlinear decision feedback equalizer works in the time domain and uses least mean squ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/015H04L25/03H04N5/21H04N5/44
CPCH04N5/4401H04L2025/03382H04N21/6112H04L2025/0349H04N21/4382H04N5/211H04L25/0228H04L25/03159H04N21/426H04N7/015
Inventor 金俊泰
Owner LG ELECTRONICS INC
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