MIMO-OFDM synchronization method and apparatus
A MIMO-OFDM and synchronization device technology, applied in the field of wireless communication systems, can solve problems such as inability to define the first path of the channel, inaccurate timing, etc.
Inactive Publication Date: 2008-11-26
ZTE CORP
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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
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The invention provides a MIMO-OFDM synchronization method, comprising: 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. The invention can realize frame synchronization and symbol synchronization together and can accurately define the first path in a multi-path fading channel.
Description
technical field 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 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 series of flat ...
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Inventor 王衍文郝东来
Owner ZTE CORP