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Method and base station of implementing time-division CDMA system uplink synchronous control

A technology of synchronous control and line synchronization, which is applied in the transmission system, baseband system components, and communication between multiple stations, etc., can solve the problems of large amount of calculation and many control parameters, and achieves less calculation and less control parameters. The effect of few and fast tracking of channel changes

Inactive Publication Date: 2012-05-30
POTEVIO INFORMATION TECH CO LTD
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Problems solved by technology

[0061] From the above analysis, it can be seen that when the current technology realizes uplink synchronous control, there are problems of many control parameters and a large amount of computation.

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  • Method and base station of implementing time-division CDMA system uplink synchronous control
  • Method and base station of implementing time-division CDMA system uplink synchronous control
  • Method and base station of implementing time-division CDMA system uplink synchronous control

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Embodiment Construction

[0102] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0103] The basic idea of ​​the present invention is: the average additional delay of the uplink channel is used as the center of gravity position of the time domain uplink user channel impulse response envelope and compared with the center position of the set channel estimation window to obtain the corresponding uplink synchronization control command to The purpose of the uplink synchronization control is to make the envelope of the time-domain uplink user channel impulse response of each user always fall within the set fixed-length channel estimation window.

[0104] figure 1 It is a schematic flow chart of uplink synchronization control in the present invention, including the following steps:

[0105] Step 101: Extract the data of the ...

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Abstract

The invention provides a method realizing an uplink synchronous control of a time-division CDMA system. The step includes that: the gravity position centre of an impulse response envelop of a time domain uplink consumer channel is calculated. According to the comparison result of the gravity position centre of the envelope and the center position of a channel estimation window, an uplink synchronous control order is generated. The invention also provides a base station realizing the uplink synchronous control of the time-division CDMA system. The base station includes a channel estimation module, a gravity position centre generating module of the impulse response envelop of the uplink consumer channel, a decision module of the uplink synchronous control and a sending module of the uplink synchronous order. The invention can reduce the control parameters and simplifies the calculation, which is applicable to various wireless multipath fading environments.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and a base station for realizing uplink synchronization control of a Time Division Code Division Multiple Access (CDMA, Code Division Multiple Access) system. Background technique [0002] Time Division-Code Division Multiple Access (TD-CDMA, Time Division-Code Division Multiple Access) system is the third-generation CDMA system that adopts Time Division Duplex mode (TDD, Time Division Duplex), and its characteristic is that the uplink and downlink use the same The channel is suitable for information sharing, and it is easy to share channel information between two base stations. Effective asymmetric communication can be obtained between uplink and downlink. [0003] Time Division-Duplex Code Division Multiple Access (TDD-CDMA, Time Division Duplex-Code Division Multiple Access) is a modified version of TD-CDMA in the third generation technology. At prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04B1/7115H04L25/02H04B1/7073
Inventor 李晋声
Owner POTEVIO INFORMATION TECH CO LTD
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