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Selfadaptive time slot structure based on dual cycle structure and implement method thereof

A dual-loop, self-adaptive technology, applied in the direction of communication between multiple stations, radio/induction link selection arrangement, electrical components, etc., can solve problems such as resource waste, reduce overhead, improve channel estimation accuracy, simplify The effect of complexity

Inactive Publication Date: 2004-09-01
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

For low-speed mobility, these pilot sequences have exceeded the requirements to ensure the accuracy of channel estimation, so the fixed slot structure will lead to waste of resources

Method used

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  • Selfadaptive time slot structure based on dual cycle structure and implement method thereof
  • Selfadaptive time slot structure based on dual cycle structure and implement method thereof
  • Selfadaptive time slot structure based on dual cycle structure and implement method thereof

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Embodiment Construction

[0023] The present invention proposes an adaptive time slot structure based on a "double cycle structure". The basic idea is: for different moving speeds, different time slot structures will be used to reduce overhead and save spectrum resources. Specifically, for relatively low moving speeds, fewer pilot sequences are inserted in the time slots; for higher moving speeds, more pilot sequences are inserted in the time slots, and a double-cycle structure is introduced in the time slots , that is, there is a cyclic protection before each pilot; and this pilot and its cyclic protection are the "big cyclic protection" of the data segment plus the next pilot and cyclic protection, thus forming a "double-cycle structure".

[0024] figure 1 The time slot in is composed of one or more sub-slots "G+P+D" and the tail "G+P". According to the moving speed of the mobile station, a time slot structure with different numbers of sub-slots is adaptively selected. The length of a slot is fixed,...

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PUM

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Abstract

The invention is a kind of self adaptation time slot structure based on bicirculating structure and the realizing method in mobile communication system. The time slot in the structure is made up of one or several sub-time-slot and tail part, it selects adaptively the time slot structure with variant time slot numbers according to the moving speed of mobile station, the length of a time slot is fixed, and the length of sub-time-slot is different in different time slot structure, each sub-time-slot is made up of circular protection G, pilot carrier P, user data segment D, and the tail part of time slot is made up of circular protection G and pilot part P, the length LG of circular protection G is not less than the maxim time delay expansion ªñ of the channel, the length LP of pilot part is more than the length LG, the back LG bits of pilot part forms the circular protection G, each segment of pilot P use the same pilot series.

Description

technical field [0001] The invention is a time slot structure applied in a mobile communication system and its realization method. It belongs to the transmitted signal format in the mobile communication system. Background technique [0002] Mobile communication is developing rapidly around the world, and data services will replace voice services as the main service of mobile communications. With the rapid development of the Internet, people have higher and higher requirements on the rate of mobile data services. However, the spectrum resources available for mobile communication are becoming more and more scarce, and due to technical and economical considerations, the bandwidth of mobile communication systems cannot be increased without limit. This requires the mobile communication system to efficiently support high-speed data services. [0003] In a mobile communication system, in order to achieve coherent demodulation, it is necessary to use pilo...

Claims

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Application Information

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IPC IPC(8): H04W80/00H04B1/76H04B7/26
Inventor 潘志文高西奇尤肖虎
Owner SOUTHEAST UNIV
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