OFDM (Orthogonal Frequency Division Multiplexing) block transmission method based on time-frequency two-dimension training information

A two-dimensional technology of training information and time-frequency, applied in the field of wireless transmission, can solve the problems of losing the core advantages of TDS-OFDM technology, such as high spectral efficiency, long guard interval, and decreased spectral efficiency
CN102158459AActive Publication Date: 2011-08-17TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2011-08-17

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Abstract

The invention discloses an OFDM block transmission method based on time-frequency two-dimension training information, relating to the wireless transmission in digital communication. The method comprises the following steps of: A, the training information simultaneously existing in time domain training sequence and frequency domain grouping pilot frequency; B, estimating the multi-path time delay information of the channel by directly using the time domain training sequence with interference, and estimating the coefficient of each path through the frequency domain grouping pilot frequency estimating channel so as to finish the channel estimation of time-frequency joint; C, finishing the cycle performance reconfiguration of OFDM data block by the using of the result of channel estimation, and eliminating the sub-carrier interference under the dynamic channel, and then performing the frequency domain balance again. The method has very high frequency spectrum efficiency and also obtains better transmission performance under the dynamic channel.
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Description

technical field

[0001] The invention relates to the technical field of wireless transmission in digital communication, in particular to an OFDM block transmission method based on time-frequency two-dimensional training information. Background technique

[0002] The physical layer transmission technology is one of the core technologies of the communication system, because the complexity and performance of many receiver algorithms, including synchronization, channel estimation, equalization, etc., are closely related to the signal transmission format of the transmitter. In the next generation of wireless communication standards, the key difference between TD-LTE (TD-SCDMA Long Term Evolution) and LTE-FDD (LTE-Frequency Division Duplexing) lies in the difference in the structure of the physical layer block transmission frame. Similarly, the core technology that differentiates the first generation of Chinese digital television standard DTMB (Digital Television / Terrestrial Multim...

Claims

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