Method of Wiener-Kolmogorov model interpolation based on time domain signal-to-noise ratio

A technology of signal-to-noise ratio estimation and interpolation method, which is applied in the field of broadcasting systems, can solve problems such as increasing receiver implementation complexity and affecting receiver performance, and achieves the effect of avoiding matrix inversion operation and simplifying implementation complexity

Inactive Publication Date: 2008-06-18
BEIJING SAMSUNG TELECOM R&D CENT +1
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Although the Wiener interpolator is the best interpolator under the minimum mean square error criterion, it still has the following deficiencies: the statistical characteristics of the transmission channel, the accuracy of the estimation of the signal-to-noise ratio, and the Wiener interpolator used for interpolati

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of Wiener-Kolmogorov model interpolation based on time domain signal-to-noise ratio
  • Method of Wiener-Kolmogorov model interpolation based on time domain signal-to-noise ratio
  • Method of Wiener-Kolmogorov model interpolation based on time domain signal-to-noise ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] The actual DRM broadcast channel is a double-fading channel with both frequency selectivity caused by multipath and time selectivity caused by Doppler spread or frequency shift. Among them, the multipath propagation is mainly caused by the reflection of the ionosphere at different heights. The maximum delay spread of the channel can reach several milliseconds. The Doppler spread and frequency shift are mainly caused by the spectral characteristics of the ionospheric reflection and the movement of the receiver. . Taking mid-latitude regions as an example, the maximum delay spread can reach 6ms, and the Doppler spread can reach 5Hz. Typically, the typical values ​​of delay spread and Doppler spread are 2ms and 1Hz, which are the parameter values ​​of channel model 4 we use.

[0069] In line with the principle of proceeding from reality, we investigated the situation of channel model 3 and channel model 4 in the DRM specification, in which channel model 3 is the USConsort...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A wiener interpolation method based on time domain SNR estimation includes the steps of acquiring a channel frequency response of a pilot subcarrier; utilizing two cascade interpolation filters to acquire the channel frequency response of a data subcarrier; utilizing a stored interpolation result to carry through frequency domain equalization of single tap on the data received on the data subcarrier. The performance of the wiener interpolation method estimated by the real time flatness SNR of the invention is very close to the performance under a situation estimated by an ideal SNR and is extremely better than the system of the method by adopting line interpolation. Furthermore, by adopting a method for storing the parameters of an interpolation filter in advance, the matrix inversion with large calculating amount can be avoided, thereby greatly simplifying the realizing complexity of a receiver.

Description

technical field [0001] The present invention relates to a broadcasting system, in particular to a Wiener interpolation method based on time-domain signal-to-noise ratio estimation. Background technique [0002] DRM is the only universal non-proprietary digital radio broadcasting system for the shortwave, mediumwave and longwave AM broadcasting bands. Under the same coverage conditions, the power of the DRM transmitter is 6-9dB lower than that of the traditional analog transmitter, and the same-adjacent frequency protection rate of digital broadcasting is lower than that of analog broadcasting. It has strong anti-multipath interference ability and is convenient for mobile reception; the sound quality can Reach the quality of CD or FM stereo; can provide additional data and multimedia information; compared with DAB, its receiver price is easier to be accepted by the audience. Its appearance is a sign of the revival of broadcasting in the frequency band below 30MHz, and it has...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04L25/02H04L27/26
Inventor 潘立军魏立军
Owner BEIJING SAMSUNG TELECOM R&D CENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap