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

Frequency offset compensation method of virtual MISO system

A technology of frequency offset and compensation method, applied in multi-frequency code systems, diversity/multi-antenna systems, space transmit diversity and other directions, can solve the problems of difficult compensation, multiple frequency offsets of received signals, etc. effect achieved

Inactive Publication Date: 2009-07-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is: how to provide a frequency offset compensation method for a distributed virtual MISO-OFDM system, which can be used to solve the problem that there are multiple frequency offsets in the received signal and it is not easy to compensate

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 compensation method of virtual MISO system
  • Frequency offset compensation method of virtual MISO system
  • Frequency offset compensation method of virtual MISO system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described below in conjunction with accompanying drawing:

[0018] The frequency offset compensation method disclosed in the present invention includes the following steps:

[0019] 1. When the source node and the relay node communicate with the destination node, they will first interact with the destination node. In each communication in the wireless local area network, a preamble training sequence will be introduced to estimate the symbol timing and frequency deviation between the mutual communication nodes. .

[0020] 2. The source node first shares the data to be sent with the relay node with a small power, and the source node and the relay node perform STBC encoding on the data to be transmitted by the source node, and obtain the data to be transmitted respectively.

[0021] 3. Each node in the cell at the transmitting end inputs its own data into the OFDM modulator, completes the parallel-to-serial conversion and adds a cycli...

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 deviation compensating method in a visual MISO system. The method comprises the following steps: A. when source nodes and trunk nodes are communicated with destination nodes, measurement is carried out to frequency deviation among the nodes by a training sequence; B. the source nodes share data to be transmitted to the trunk nodes and the source nodes and the trunk nodes carry out STBC coding to data to be transmitted by the sources nodes and obtain respectively the data to be transmitted; C. OFDM modulation is carried out to data to be transmitted by all transmitting nodes; the transmitting nodes in a source cell carry out frequency deviation compensation to OFDM signals according to respective frequency deviation to the destination nodes; and all the nodes in the source cell transmit data compensated by frequency out simultaneously; and D. the signal received by a receiving end is a mixed signal of the transmitting signals of the source nodes and the trunk nodes; and the signal is decoded by space time so as to obtain the original transmitted data. The frequency deviation compensating method solves the compensation problem of multiple frequency deviation in the received signal, can effectively improve the performance of the system and is easy to be implemented.

Description

technical field [0001] The invention relates to the technical field of frequency synchronization in a wireless network virtual MIMO system, in particular to a frequency offset compensation method in a virtual MIMO system. Background technique [0002] With the continuous development of mobile communication technology and people's demand for wireless mobile multimedia services, higher requirements are put forward for the data transmission rate of the wireless communication system. MIMO technology can provide better space diversity and higher system capacity, and can significantly improve system performance. Therefore, MIMO technology has attracted much attention and has become a key technology for next-generation communication systems. MIMO technology requires mobile terminals to use multiple antennas. However, the development trend of modern mobile terminals is the miniaturization of terminals. Limited by the size of mobile terminals and the level of hardware implementation,...

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): H04B7/04H04L27/26H04L1/06
Inventor 隆克平邝育军翟春华方文斌张旭
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA