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Auxiliary synchronizing channel transmission method of full-area multi-beam satellite LTE

A channel transmission and auxiliary synchronization technology, applied in the direction of multi-frequency code system, baseband system components, etc., can solve the problems of unsuccessful cell search and mutual interference, achieve fast cell search, avoid interference, and realize residual frequency offset Effect

Active Publication Date: 2014-04-30
SOUTHEAST UNIV
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Problems solved by technology

The multi-beam S-LTE system of the same frequency network uses a large antenna array to generate multiple beams on the satellite, and forms multiple cells after reaching the ground. The cells of satellites on different orbits may overlap each other. With the same S-SCH time-frequency structure and subcarrier mapping method, the S-SCHs of satellites in different orbits will interfere with each other, and cell search cannot be successfully realized

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  • Auxiliary synchronizing channel transmission method of full-area multi-beam satellite LTE
  • Auxiliary synchronizing channel transmission method of full-area multi-beam satellite LTE
  • Auxiliary synchronizing channel transmission method of full-area multi-beam satellite LTE

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Embodiment Construction

[0047] In the following, the present invention will be further clarified in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, those skilled in the art will give various equivalent forms of the present invention. All the modifications fall within the scope defined by the appended claims of this application.

[0048] The auxiliary synchronization channel transmission method of multi-beam satellite LTE with full coverage includes the time-frequency structure of S-SCH and the sub-carrier mapping method of frequency-domain SSS sequence.

[0049] Take time slot 0 as an example. First, according to the frequency domain SSS sequence generation formula, the 62-point frequency domain SSS sequence d of satellite 1 and satellite 2 are generated respectively 1 (n) and d 2 (n).

[0050] Then, according to the S-SCH time-frequency ...

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Abstract

The invention discloses an auxiliary synchronizing channel transmission method of full-area multi-beam satellite LTE. The method includes a time frequency structure of an S-SCH and a sub-carrier mapping mode of a frequency domain SSS sequence, sixth and seventh OFDM symbols of the S-SCH in the number zero time slot and the number ten time slot in a time domain, and seventy-two sub-carriers of the S-SCH in the center of a system downlink transmitting bandwidth in a frequency domain, wherein DC sub-carriers are not included. According to the method, interference of S-SCHs of different satellites in a full-area multi-beam satellite LTE system is avoided, the cell search performance is improved, and quick cell searching is achieved. Meanwhile, by means of the S-SCH transmission scheme, estimation of residual frequency offset is convenient to achieve.

Description

Technical field [0001] The invention relates to an auxiliary synchronization channel transmission method of a multi-beam satellite LTE with full coverage, belonging to the technical field of broadband wireless communication. Background technique [0002] Satellite mobile communication is one of the necessary means to realize communication in any place. In recent years, the fourth generation (The Fourth Generation Mobile Communication Systems, 4G) terrestrial cellular mobile communication has matured, with orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM), multiple-input multiple-output (Multiple-Input Multiple- Output, MIMO) and co-frequency networking are the key technologies of the third-generation partnership program long-term evolution technology (The3 rd Generation Partnership Project Long Term Evolution, 3GPP-LTE) has been put into commercial use one after another. Apply terrestrial LTE (Terrestrial LTE, T-LTE), which has the ch...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L25/02
Inventor 王海明邓祝明高西奇尤肖虎
Owner SOUTHEAST UNIV
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