Symbol synchronization method based on OFDM anti-impulse noise
A symbol synchronization and anti-pulse technology, applied in digital transmission systems, electrical components, modulated carrier systems, etc., can solve the problems of integrated receiver interference and high computational complexity, and achieve reduced pulse noise, simple cost functions, and convenient time-frequency Effect of Offset Estimation and Compensation
Active Publication Date: 2020-11-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF5 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In addition, preamble-independent schemes can use multiple candidate subvectors to reduce channel distortion, but at the cost of high computational complexity
[0005] In the existing technology, since a large number of wireless communication devices in an area share the same spectrum resources, when they transmit their own signals at the same time, they often cause comprehensive interference to each receiver
The combined interference is non-Gaussian and impulsive, making OFDM synchronization a more challenging task
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0044]In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.
[0045] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wit...
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
Login to View More Abstract
The invention discloses a symbol synchronization method based on OFDM anti-impulse noise, and relates to the technical field of wireless communication. According to the method, the impulse noise froma receiver side is reduced through an SWC method, symbol timing synchronization is performed by adopting two-stage cross-correlation, timing measurement is optimized by utilizing exhaustion peak search and a balance algorithm, and a cost function comprehensively considers main peaks, left and right secondary peaks and similarity of the left and right secondary peaks of signals. Therefore, the meansquare error performance can be remarkably improved, accurate time-frequency offset estimation and compensation can be conveniently obtained, and the OFDM technology can be more widely applied to thefield of comprehensive wireless access.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to an OFDM-based anti-impulse noise symbol synchronization method. Background technique [0002] Orthogonal frequency division multiplexing (OFDM) technology is one of the realization methods of multi-carrier transmission scheme. The application of OFDM technology can be traced back to the 1960s. In the paper of R.W.Chang on the synthesis of band-limited signals for multi-channel transmission A transmission method for simultaneously transmitting multiple channels of information on a linear band-limited channel is proposed, which can avoid both subcarrier interference and intersymbol interference. [0003] OFDM technology is currently the simplest and most widely used multi-carrier transmission scheme. It divides high-speed data streams into parallel low-speed data streams, and uses them to modulate mutually orthogonal subcarriers, thereby forming multiple low-rate da...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2657H04L27/2662H04L27/2666H04L27/2688H04L27/2695
Inventor 杨帆朱志坚李韬黄翠彦胡丁文
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA