Forecasting method of up-link synchronization tracing in time-division duplex wireless 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: 2013-03-27
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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  • Forecasting method of up-link synchronization tracing in time-division duplex wireless communication system
  • Forecasting method of up-link synchronization tracing in time-division duplex wireless communication system
  • Forecasting method of up-link synchronization tracing in time-division duplex wireless 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

The invention relates to a method for predicting ascending synchronous track in time-division duplex wireless communication system, wherein said method comprises that: (1), base station evaluates all ascending channels between terminal and each antenna; (2), processing multiple interpolation on said ascending channel evaluate result, calculating out the average power of all antennas, and obtaining peak position of present sub frame of each terminal; (3), processing recursive average on the peak position; (4), when the sum of present sub frame number and delay sub frame number is divided by adjusting frequency, resetting the SS of last adjusting frequency sub frames which contains present sub frame; (5), calculating out the error between peak position evaluated from present sub frame channel evaluation and the predicted sub frame peak position, processing recursive average on said error; (6), adding the result of step (5) and the predicted sub frame peak position, to obtain the predicted peak position of said sub frame. The invention can improve synchronous control accuracy, and improve ascending demodulation property.

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 Patents(China)
IPC IPC(8): H04B7/26
Inventor 杨新星卢华
Owner ZTE CORP
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