Unlock instant, AI-driven research and patent intelligence for your innovation.

Channel estimater and channel estimating method in telecommunication system

A channel estimator and channel estimation technology, applied in the field of channel estimation, can solve problems such as poor robustness, inaccurate estimation, and poor effect, and achieve the effect of improving accuracy and improving robustness

Inactive Publication Date: 2007-06-20
HUAWEI TECH CO LTD
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0064] In this LMMSE channel estimation method, since a preset fixed channel model is used to calculate the channel autocorrelation matrix, the channel characteristics in the actual communication system are often time-varying. When the channel characteristics are more consistent with the preset model , the estimation is more accurate; and when the channel characteristics vary greatly from the preset model, the estimation of this method is not accurate, and the effect will be relatively poor, which leads to the relatively poor robustness of the method

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
  • Channel estimater and channel estimating method in telecommunication system
  • Channel estimater and channel estimating method in telecommunication system
  • Channel estimater and channel estimating method in telecommunication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0120] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0121] The main idea of ​​the present invention is to propose a channel estimation scheme using the iterative idea, through multiple iterations, the channel estimation value converges to be very close to the actual channel response value, so that the calculated channel autocorrelation matrix can track the time-varying The change of the channel has relatively high accuracy at the same time, which effectively improves the performance of channel estimation.

[0122] Fig. 2 is a schematic diagram of an exemplary structure of a channel estimator in a communication system according to the present invention. as shown in picture 2,

[0123] A channel estimator in a communication system, the channel estimator includes:

[0124] A channel aut...

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

The invention discloses a channel estimator in communication system, comprising: channel autocorrelation matrix calculation modules used to calculate the channel autocorrelation matrix according to the first channel estimated parameters; channel estimated module carry through first matrix channel estimation according to least squares (LS) channel estimated result and the channel autocorrelation matrix calculated from the first channel estimated parameters, the channel autocorrelation matrix calculation modules further re-calculate channel autocorrelation matrix with the first channel estimated values, the channel estimated module further estimate the channel according to the re-calculated channel autocorrelation matrix and LS channel estimated results. The invention also discloses a channel estimation method in communication system. Using the invention can greatly improve the accuracy of channel estimation.

Description

technical field [0001] The present invention relates to the technical field of channel estimation, and more specifically, the present invention relates to a channel estimator in a communication system and a channel estimation method thereof. Background technique [0002] Current communication systems are mainly divided into wireless communication systems and wired communication systems. Whether it is a wireless communication system or a wired communication system, the channel needs to be estimated. [0003] The second-generation mobile communication uses time division multiple access (TDMA) and narrowband code division multiple access (CDMA) as the main access technologies, such as the global mobile communication (GSM) system and the CDMA IS-95 mobile communication system. The three generations of mobile communication use broadband CDMA as the main access technology, such as Universal Mobile Telecommunications System (UMTS) and Wideband Code Division Multiple Access (WCDMA)...

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): H04L27/26H04L25/02
Inventor 吕峻
Owner HUAWEI TECH CO LTD