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MIMO-OFDM synchronization method and apparatus

A MIMO-OFDM and sequence technology, applied in the field of wireless communication systems, can solve problems such as undefined channel and inaccurate timing of SC algorithm

Inactive Publication Date: 2011-12-07
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0036] It can be seen from the above description that due to the inaccurate timing of the SC algorithm, timing synchronization should be divided into frame synchronization and symbol synchronization. The strongest path, but not the first path defined in the channel

Method used

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  • MIMO-OFDM synchronization method and apparatus
  • MIMO-OFDM synchronization method and apparatus
  • MIMO-OFDM synchronization method and apparatus

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Experimental program
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Embodiment Construction

[0085] Embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0086] method embodiment

[0087] In an embodiment of the present invention, a CAZAC sequence-based MIMO-OFDM synchronization method is provided.

[0088] In this method, use the figure 2 The frame structure is shown, and the sequence used is the chu sequence.

[0089] Such as image 3 As shown, the method includes the following processing: step S302, using the correlation characteristics between the received signal and the training sequence to obtain the timing objective function, thereby obtaining the frame timing position; step S304, performing integer frequency offset estimation, and using the integer frequency offset estimation value Correct the frame timing position obtained in step S302, thereby obtaining the arrival time of the strongest channel path; step S306, correct the arrival time of the channel strongest path obtained in step S304...

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Abstract

The invention provides a MIMO-OFDM synchronization method, comprising steps of: S302, utilizing the correlation property between the received signals and the training sequence to attain a timing target function, to attain a frame timing position; S304, processing integer frequency bias estimation and adopting the result to correct the frame timing position attained in the S302, to attain the arrival time of the channel strongest path; S306, correcting the arrival time of the channel strongest path attained in S304; S308, adopting the phase of a frame synchronization function to attain a decimal frequency bias estimated value. According to the technical proposal of the invention, frame synchronization and symbol synchronization can be realized together and the first path in a multi-path fading channel can be defined accurately.

Description

technical field [0001] The present invention relates to MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) wireless communication system, and in particular, to a MIMO-OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) synchronization method and device, which preferably Ground is based on CAZAC sequence (Constant Amplitude Zero Auto Correlation, constant envelope zero autocorrelation sequence). Background technique [0002] OFDM technology is widely used in many broadband data communication systems (such as DAB, DVB and HDTV) and wireless local area network standards WLAN IEEE802.11a / g due to its high spectrum utilization, anti-frequency selective fading and narrow-band interference. ; On the other hand, MIMO technology can provide diversity gain and multiplexing gain under flat fading channel conditions, and can increase system capacity. Since OFDM technology can convert frequency selective fading channels into a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L27/00
Inventor 王衍文郝东来
Owner ZTE CORP
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