Predicted method of upload synchronous tracking in time-division duplex radio communication system

A wireless communication system and synchronous tracking technology, applied in the field of time-division duplex mobile communication, can solve problems such as inaccurate prediction values, achieve the effect of improving synchronization control accuracy and enhancing uplink demodulation performance

Inactive Publication Date: 2006-04-12
ZTE CORP
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems and deficiencies in the existing uplink synchronous tracking prediction algorithm that do not take into account the influence of the adjusted frequency on the predicted synchronization offset control symbol, resulting in inaccurate predicted values ​​and deficiencies, and provide a time-division system with high prediction accuracy Prediction Method of Uplink Synchronous Tracking in Duplex Wireless Communication System

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  • Predicted method of upload synchronous tracking in time-division duplex radio communication system
  • Predicted method of upload synchronous tracking in time-division duplex radio communication system
  • Predicted method of upload synchronous tracking in time-division duplex radio communication system

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[0016] The technical features and functional features of the present invention will be further described below in conjunction with specific embodiments, with the purpose of better explaining the present invention, but not intended to limit the protection scope of the present invention.

[0017] see figure 1 , the specific implementation steps of the prediction method of uplink synchronous tracking in the multi-antenna situation in the time division duplex wireless communication system of the present invention are as follows:

[0018] Step 210, the base station uses the training sequence to estimate all uplink channels between the mobile terminal and each antenna in the same time slot;

[0019] In wireless communication systems, training sequences are often used for channel estimation, so using the training sequences known to each mobile terminal, channel estimation is performed on the sampled output data from the radio frequency receiver of the antenna, and the channel estimat...

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Abstract

A predicting method of up link synchronous tracking in time division duplex ratio communication system includes estimating all up link channels between terminal and each antenna by base station, obtaining peak value position of current sub frame on each terminal by calculating average power of all antennas, carrying out recursive average for said peak value position ( PVP ), reassigning SS of individual sub frame with its frequency being regulated when number sum of current sub frame and delay sub frame can be divided exactly by regulated frequency, calculating out error between predictive PVP and estimated PVP and carrying out recursive average on the error, adding recursive average result with predictive PVP to obtain predictive PVP of the sub frame.

Description

technical field [0001] The invention relates to the technical field of Time Division Duplex (TDD, Time Division Duplex) mobile communication, in particular to a prediction method for synchronous tracking in a TDD mobile communication system. Background technique [0002] The TDD wireless communication system is a synchronous system, which has relatively strict requirements for uplink and downlink synchronization. Uplink synchronization is closely related to the performance of the system. In the TDD wireless communication system, software and frame structure design are used to achieve strict uplink synchronization. However, since the mobile state of the mobile terminal is random, that is, the state of uplink synchronization is constantly changing, the system must have a strong ability to maintain uplink synchronization. Ability. [0003] In the CDMA TDD system, since multiple mobile terminals can communicate at the same time in one time slot, in order to reduce the mutual in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26
Inventor 杨新星卢华
Owner ZTE CORP
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