Frequency synchronization method based on joint estimation of carrier frequency offset

A carrier frequency offset and frequency synchronization technology, applied in multi-frequency code systems and other directions, can solve the problems of low synchronization accuracy, not incorporating multi-antenna technology, and not suitable for multi-antenna MIMO systems.
CN102970271AInactive Publication Date: 2013-03-13BEIJING INSTITUTE OF TECHNOLOGYGY
5 Cites 10 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2013-03-13
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a frequency synchronization method based on joint estimation carrier of frequency offset, belonging to the technical field of wireless mobile communication. The frequency synchronization method comprises the steps of: carrying out coarse frequency synchronization by using a short training field so as to correct integer frequency offset and carrying out frequency offset compensation on the basis of a coarse frequency synchronization result; by using a signal subjected to frequency offset compensation and a long training field, in combination with a segmentation related algorithm, carrying out frequency estimation to obtain a carrier frequency offset 1; obtaining a carrier frequency offset 2 on the basis of an MMSE (Minimum Mean Square Error) criterion; further obtaining a carrier frequency offset 3 on the basis of a mean square error criterion, and giving frequency synchronization results in different wireless channel environments; and finally, on the basis of the frequency synchronization results, carrying out frequency offset correction on a received signal. According to the frequency synchronization method, the synchronization mean square error of a wireless system is greatly lowered and the synchronization precision is effectively improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a frequency synchronization method for jointly estimating carrier frequency offset, which belongs to the technical field of wireless mobile communication. Background technique

[0002] With the rapid development of military and civilian wireless communication systems, the physical layer architecture of OFDM technology combined with multi-antenna technology can achieve high spectral efficiency and high-speed broadband wireless transmission. The data symbol transmission rate can be as high as 100Mbps or more, and with the increase in the number of antennas and the improvement of key technologies in the wireless mobile field, the signal coverage effect is getting better and better. By using array antennas in the OFDM transmission system to achieve space diversity, the tolerance of the wireless system to noise, interference, and multipath is greatly increased, and the transmission rate of the wireless communication system is greatl...

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