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

A frame synchronization method, device and receiver for ofdm

A frame synchronization and starting position technology, applied in the field of OFDM receivers, can solve the problems of frequency offset sensitivity, high probability of false detection and high probability of missed detection

Inactive Publication Date: 2016-06-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] OFDM frame synchronization based on the above method is either sensitive to frequency offset, or has a high probability of false detection and missed detection

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
  • A frame synchronization method, device and receiver for ofdm
  • A frame synchronization method, device and receiver for ofdm
  • A frame synchronization method, device and receiver for ofdm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0012] For the sake of simplicity, some unnecessary technical features known to those skilled in the art are omitted in the following description.

[0013] figure 1 Shown is a flowchart of an embodiment of the frame synchronization method 100 for OFDM of the present invention. figure 1 The illustrated frame synchronization method 100 for OFDM includes steps 101 ...

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 relates to the technical field of symbol synchronization in wireless communication, in particular to a frame synchronization method and device for OFDM and an OFDM receiver. The method proposed by the present invention includes: selecting the data sequence from the received signal according to the preset starting position and the length of the correlation window; calculating the correlation value of the first half and the second half of the data sequence; based on the correlation value and the data Calculating the value of the timing metric from the energy of the sequence; and when the value of the timing metric is greater than or equal to a preset threshold value, judging and outputting a frame synchronization result. The frame synchronization method and device for OFDM and the OFDM receiver of the present invention have low false detection probability and missed detection probability at the same time, are independent of frequency offset and are very convenient to set the threshold of frame synchronization under complex channel environment.

Description

technical field [0001] The invention relates to the technical field of symbol synchronization in wireless communication, in particular to a frame synchronization method and device for OFDM and an OFDM receiver. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplexing) is a special multi-carrier transmission scheme, because it can effectively resist frequency selective fading and narrow-band interference, and has the advantages of high data transmission rate, high spectral efficiency and strong anti-interference ability , so it is widely used in digital audio broadcasting (Digital Audio Broadcasting, DAB), wireless local area network (Wireless Local Area Networks, WLAN) and other systems. The OFDM system requires strict orthogonality between subcarriers, which makes it very sensitive to synchronization errors. Therefore, frame synchronization is a key issue in OFDM systems. [0003] Existing frame synchronization methods for OFDM generally first calcula...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 杨帆李洋邵怀宗王文钦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA