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

OFDM (orthogonal frequency division multiplexing) synchronization method based on multi-transmitting antenna technology

An antenna technology, a technology of transmitting antennas, applied in the direction of multi-frequency code system, etc., can solve the problem of not considering the performance of frequency offset estimator of multi-antenna system, and achieve the effect of improving performance

Inactive Publication Date: 2011-04-13
BEIJING JIAOTONG UNIV
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These existing frequency offset estimation algorithms mainly focus on how to use the parameter estimation method to estimate the frequency offset from the received signal in the Single Input Single Output (SISO) system, without considering the use of Multi-antenna system to improve the performance of frequency offset estimator

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
  • OFDM (orthogonal frequency division multiplexing) synchronization method based on multi-transmitting antenna technology
  • OFDM (orthogonal frequency division multiplexing) synchronization method based on multi-transmitting antenna technology
  • OFDM (orthogonal frequency division multiplexing) synchronization method based on multi-transmitting antenna technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0027] figure 1 It is a structural diagram based on multiple transmit antenna technology. figure 1 Among them, the OFDM synchronization method based on multi-transmission antenna technology is realized by multiple transmission antennas, and the steps include:

[0028] Step 1: Make each transmitting antenna transmit mutually orthogonal frequency-domain modulation symbols; the frequency-domain modulation symbols have a periodic repetition structure.

[0029] Assuming that in a multi-transmission antenna system, the synchronization sequence transmitted on the i-th antenna is s i [k], (k=0, Λ, N-1), and the synchronization sequences on different antennas are mutually orthogonal, namely

[0030] Σ ...

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 an OFDM (orthogonal frequency division multiplexing) synchronization method based on a multi-transmitting antenna technology, which belongs to the technical field of wireless communication. The method comprises the following steps: sending mutually-orthogonal frequency-domain modulated symbols by transmitting antennas, wherein the frequency-domain modulated symbols are of a periodic repetitive structure; carrying out inverse Fourier transform on the frequency-domain modulated symbols so as to obtain time-domain synchronous symbols; and carrying out frequency offset estimation and timing synchronization by the time-domain synchronous symbol of each transmitting antenna. The method of the invention has the advantage that the OFDM synchronization is performed by usingthe multi-transmitting antenna technology, therefore, the properties of frequency offset estimation and timing synchronization are improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an OFDM synchronization method based on multiple transmitting antenna technology. Background technique [0002] Frequency offset estimation is one of the most important links in digital communication systems, especially for modern communication systems, since Orthogonal Frequency Division Multiplexing (OFDM) technology is widely used as the physical layer standard, so frequency Bias estimates are more important. This is because the OFDM system is very sensitive to frequency offset, and a very small frequency offset can cause very large performance degradation. Therefore, in an OFDM system, the quality of the frequency offset estimation determines the bit error performance that the system can achieve. [0003] In view of the important role of frequency offset estimation in OFDM technology, a large number of frequency offset estimation techniques suitab...

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 Applications(China)
IPC IPC(8): H04L27/26
Inventor 刘寅生王海波谈振辉
Owner BEIJING JIAOTONG UNIV