Frequency offset estimation and timing method and device

A frequency offset estimation and timing technology, which is applied in the communication field, can solve the problems of low timing accuracy and large limitations, and achieve the effect of improving accuracy and avoiding excessive processing

Inactive Publication Date: 2012-02-08
大连海兰德维通信技术有限公司
View PDF2 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Aiming at the problems of low frequency offset estimation and timing accuracy and large limitations in the related art, the present invention proposes a method and device for frequenc...

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
  • Frequency offset estimation and timing method and device
  • Frequency offset estimation and timing method and device
  • Frequency offset estimation and timing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] In view of the problems of low frequency offset estimation and timing accuracy and large limitations in the related art, the present invention proposes to determine a reasonable search window based on the rough timing results and the position of false peaks, and perform integer multiple frequency offset detection within the determined search window. Obtaining integer multiple frequency offset estimation results and precise timing results can avoid the problem of excessive processing caused by unreasonable search ranges in related technologies, and can eliminate the influence of false peaks and noise on frequency offset estimation results, effectively improving frequency offset estimation. and timing accuracy.

[0042] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] According to an embodiment of the present invention, a method for frequency offset estimation and timing is provided.

[0044] Suc...

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 frequency offset estimation and timing method and a frequency offset estimation and timing device. The method comprises the following steps of: performing rough timing on a received signal according to a rough timing scheme to obtain a rough timing result; performing decimal frequency offset estimation based on a repetitive structure of the received signal according to the rough timing result to obtain a decimal frequency offset estimation result; determining a searching window according to an error range of the rough timing result and the positions of ghost peaks produced by integral frequency offsets; and in the searching window, performing integral frequency offset detection on the received signal by utilizing the decimal frequency offset estimation result and at least one integral frequency offset, and obtaining an integral frequency offset estimation result and a precise timing result according to an integral frequency offset detection result. By the method and the device, the influence of the ghost peaks and noises on the frequency offset estimation results can be eliminated, the problem of over-high processing load caused by an irrational searching range in related technologies can be solved, and the frequency offset estimation and timing precision can be effectively improved; and the method and the device can be effectively adapted to scenes with high noises and frequency offsets.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for frequency offset estimation and timing. Background technique [0002] Multi-carrier technology is a high-speed data transmission technology that decomposes a high-speed data stream into several low-speed data streams, and each low-speed data stream is transmitted in parallel on orthogonal sub-carriers. Compared with single-carrier systems, multi-carrier systems It has higher frequency efficiency. Orthogonal Frequency Division Multiplexing (OFDM for short) is a typical multi-carrier system, which introduces a Cyclic Prefix (CP for short), which can effectively overcome the intersymbol caused by multipath fading. crosstalk. OFDM is a core technology of a Long Term Evolution (LTE for short) system and a fourth generation mobile communication system, and is adopted by multiple industrial standards. [0003] Timing and frequency offset estimation are an imp...

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): H04L27/26H04L25/03H04B1/7105
Inventor 张洪伟韩志学严振亚喻晓冬杜立可
Owner 大连海兰德维通信技术有限公司
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