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Multipath channel estimation method

A channel estimation and channel technology, which is applied in the field of communication, can solve the problems of complex implementation and long channel estimation cycle, and achieve the effect of reducing the complexity of implementation and shortening the channel estimation cycle

Active Publication Date: 2014-09-03
ALTO BEAM (CHINA) INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a multipath channel estimation method, which can solve the problem that the channel estimation method in the related art has a long period of channel estimation and complicated implementation

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Embodiment Construction

[0029] In order to clearly describe the present invention, the DTTB data frame structure will be introduced first.

[0030] The basic unit of the DTTB data frame structure is a signal frame. Each signal frame is composed of a frame header and a frame body. The frame header and the frame body have the same baseband symbol rate of 7.56 MS / s. The frame body part contains a total of 3780 symbols, that is, 36 symbols of system information and 3744 symbols of data information. The frame body data has two modes: single carrier and OFDM. The frame header part is composed of PN (Pseudo-Noise, pseudo-random) sequence, using the same QPSK modulation of I (In-phase) and Q (quadrature) channels. There are 3 types of frame header lengths, and the corresponding frame There are also 3 head modes. Figure 1-3 It shows a schematic diagram of a signal frame using frame header modes 1-3 for DTTB, where mode 1 and mode 3 are used for OFDM frame body, and mode 2 is used for single carrier frame body. ...

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Abstract

The invention provides a multipath channel estimation method which comprises the following steps of: acquiring synchronization parameters of a multipath channel from a received signal of the multipath channel as well as frame header information of each path of channel in the multipath channel; calculating related functions of the received signal and a local pseudo-random sequence according to the synchronization parameters and the frame header information and obtaining a rough impulse response value of the multipath channel according to the related functions; and obtaining impulse response estimation of the multipath channel according to the rough impulse response value. The invention realizes the beneficial effects of shortening the channel estimation cycle and reducing the realization complexity.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a method for multipath channel estimation. Background technique [0002] Currently, there are four digital television terrestrial transmission standards: [0003] 1) Trellis-Coded 8-Level Vestigial Side-band (8-VSB) modulation system developed by the Advanced Television Systems Committee (ATSC); [0004] 2) Coded Orthogonal Frequency Division Multiplexing (COFDM) modulation system adopted by the European Digital Video Terrestrial Broadcasting-Terrestrial (DVB-T) standard; [0005] 3) Bandwidth Segmented Transmission (BST) Orthogonal Frequency Division Multiplexing (OFDM) modulation adopted by Integrated Service Digital Broadcasting-Terrestrial (ISDB-T) in Japan system; [0006] 4) Single-carrier and multi-carrier OFDM modulation schemes adopted by the China Digital Television Terrestrial Broadcasting (DTTB) standard. [0007] China's DTTB uses the broadcast spectrum, and the inform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
Inventor 曾朝煌施婷婷
Owner ALTO BEAM (CHINA) INC