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Frequency-domain channel-estimation in a dvb-t receiver using complex filtering

A technology of frequency domain and channel, which is applied in the field of channel estimation of digital TV, and can solve problems such as incomplete filtering and channel estimation errors

Inactive Publication Date: 2006-02-22
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this case adjacent real CIR estimates may overlap in the same transform domain
Therefore, despite the use of a real LPF, if Figure 5 As shown by the anomalous line in (c), adjacent real CIR estimates may still exist, making the channel estimate erroneous
[0032] And, if the real LPF bandwidth is limited by T U / 6 limit or ratio T U / 6 is narrow and may not fully filter as Figure 5 The real CIR of (a), so that the channel estimation is wrong

Method used

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  • Frequency-domain channel-estimation in a dvb-t receiver using complex filtering
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  • Frequency-domain channel-estimation in a dvb-t receiver using complex filtering

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Embodiment Construction

[0053] Specific exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and these embodiments will fully inform the present invention. Those of ordinary skill in the art convey the scope of the invention. The terminology used in the detailed description of the specific exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same reference numerals denote the same components.

[0054] As used herein, the singular also implies the plural unless expressly stated otherwise. It should also be understood that the terms "comprising" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps...

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Abstract

A method for performing channel estimation in a receiver of a digital terrestrial television system can be provided by interpolating a complex signal in a frequency domain using a complex filter. The interpolation can be provided, for example, by interpolating, in the time domain, a fast fourier transformed orthogonal frequency division multiplexing (OFDM) signal and interpolating, in a frequency domain, a complex OFDM signal using the complex filter with a predetermined bandwidth. Related equalizers and computer program products are also disclosed.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2004-0065381 filed with the Korean Intellectual Property Office on Aug. 19, 2004, which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to receivers, and more particularly to channel estimation for digital television. Background technique [0003] A method of transmitting digital television (TV) can be divided into a vestigial sideband (VSB) method and a coded orthogonal frequency division multiplexing (COFDM) method, the VSB method being a single-carrier modulation method, and the COFDM method being a multi-carrier modulation method. A digital video terrestrial broadcasting (DVB-T) system using the COFDM method has been adopted by European countries as a next-generation digital terrestrial TV transmission system. Many European countries are using the DVB-T system for trial broadcasting, and the DVB-T system shares the global digital marke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L27/26H04L25/03
CPCH04L25/022H04L27/2647H04L25/0232H04L2025/03414H04N7/015
Inventor 张骏凌李圭晚佐藤正毅
Owner SAMSUNG ELECTRONICS CO LTD
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