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Channel estimator and channel estimating method

An estimator and channel technology, used in baseband system components, multi-frequency code systems, etc., can solve problems such as a large amount of memory, affect receiver performance, and reduce channel estimation accuracy, and achieve the effect of reducing hardware costs.

Inactive Publication Date: 2014-04-16
MSTAR SOFTWARE R&D (SHENZHEN) LTD +1
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AI Technical Summary

Problems solved by technology

[0006] The traditional method of estimating the frequency response of other channels without pilot signals in these scattered pilot sub-channels adopts a fixed-parameter symmetric estimation method, which needs to store more signal data (symbols), and requires a large number of memory, resulting in an increase in cost, and the estimation method with fixed parameters will also reduce the accuracy of channel estimation, directly affecting the performance of the receiver

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  • Channel estimator and channel estimating method
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  • Channel estimator and channel estimating method

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Embodiment Construction

[0029] The system architecture of the present invention is as figure 2 Shown is a receiver 2 that includes a synchronizer 21 , a channel estimator 23 , an equalizer 25 and a decoder 27 . The synchronizer 21 is used to receive a wireless signal 20, and send the synchronized synchronous signal >22 to the equalizer 25 and the channel estimator 23 . The receiver 2 can receive digital video broadcasting (Digital Video Broadcasting-Terrestrial; DVB-T) signals, digital video satellite broadcasting (Digital Video Broadcasting-Satellite; DVB-S) signals formulated by the Digital Video Broadcasting (DVB) organization , Digital Video Broadcasting-Cable (DVB-C) signals and other standards; or digital TV standards formulated by the Advanced Television System Committee (Advanced Television System Committee; ATSC); or related digital TV standards formulated by other standards organizations standard.

[0030] image 3Shown is a schematic diagram of the relationship between the frequency re...

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Abstract

The invention discloses a channel estimator and a channel estimating method, which can lower the cost of a receiver and the hardware of the channel estimator and can also accurately estimate the channel response of other non-inserted pilot signal time points on a scatter pilot subchannel. The channel estimator comprises a computing module and a storage module. The computing module is used for computing the channel response of one non-inserted pilot signal time point on the scatter pilot subchannel, and the channel response is obtained through the operation of the channel response of a plurality of first pilot signals on a plurality of continuous pilot subchannels and the channel response of a plurality of second pilot signals on the scatter pilot subchannel. The storage module is used for storing the channel response of the first pilot signals and the channel response of the second pilot signals.

Description

technical field [0001] The present invention relates to a channel estimator (channel estimator) and a channel estimation method, in particular to a channel estimator and a channel estimation method for an Orthogonal Frequency Division Multiplexing (OFDM) system . Background technique [0002] In recent years, due to the rapid development of science and technology, from computerization and networking to the current digitalization, the changes in technology have brought about changes in the operation methods of various industries. the most important subject. Digital Television (DTV) is a hot topic in consumer electronics. It will not only be the development focus of the next wave of information home appliances, but also an important gateway for the Internet to enter the living room. [0003] The general digital TV broadcasting uses the Digital Video Broadcasting (DVB) signal formulated by the Digital Video Broadcasting (DVB) organization to transmit various TV signals. The ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 吴山宗
Owner MSTAR SOFTWARE R&D (SHENZHEN) LTD