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Fast uplink synchronization method and device of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access)

A TD-SCDMA and synchronization device technology, applied in the field of mobile communication terminal testing, can solve the problems of inefficient synchronization methods, high computational complexity, and large computational overhead, and achieve the effect of improving the efficiency of uplink synchronization

Active Publication Date: 2012-08-22
TRANSCOM INSTR
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since TD-SCDMA is a broadband transmission technology, in order to ensure accurate measurement, it is necessary to use a sampling signal with a higher sampling rate (usually more than 96 times), and the calculation complexity is relatively high
For real-time measurement, the above synchronization method has a large calculation overhead and is not an efficient synchronization method

Method used

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  • Fast uplink synchronization method and device of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access)
  • Fast uplink synchronization method and device of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access)
  • Fast uplink synchronization method and device of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access)

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Embodiment Construction

[0018] In the TD-SCDMA system, the burst structure on the regular time slots (TS0~6) of each subframe is as follows: figure 1 shown. A burst consists of two data blocks with a length of 352chips, a Midamble with a length of 144chips (which contains basic Midamble symbol data of 128chips) and a guard interval (GP) with a length of 16chips. The midamble code is a known training sequence, and the midamble code used by different users in the same time slot of the same cell is generated by a basic midamble code after cyclic shifting. In the measurement system, Midamble codes can be used for channel estimation and synchronization measurement, such as uplink synchronization maintenance and power measurement. In the technical solution provided by the embodiment of the present invention, uplink synchronization detection is performed on each measured time slot based on the characteristics of the Midamble code.

[0019] The technical solutions in this application will be clearly and co...

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Abstract

The invention discloses a fast uplink method and device of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access). The device comprises a radio frequency module for converting radio frequency signals transmitted by a tested terminal into intermediate frequency baseband sampling signals, and further comprises a DDP (Digital Data Processor) module, a DSP (Digital Signal Processor) module and a MC (Master Control) module, wherein the DDP module is used for converting the intermediate frequency baseband sampling signals output by the radio frequency module into first time speed sampling signals and sending to the DSP module, and the DSP module is used for carrying out signal synchronization of the received first time speed sampling signals according to measurement instructions of the MC module and determining a first synchronous position, converting the first time speed sampling signals into second time speed sampling signals, and determining a second synchronous position in the second time speed sampling signals according to the first synchronous position. In the method and the device, the uplink synchronization accuracy of the TD-SCDMA is ensured, and simultaneously the uplink synchronization efficiency of the TD-SCDMA is improved.

Description

technical field [0001] The invention relates to a mobile communication terminal testing technology in the field of communication technology, in particular to a TD-SCDMA fast uplink synchronization method and device. Background technique [0002] TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) is one of the main wireless interface standards of the third generation land mobile communication system (3G). Synchronization has stricter requirements. In the TD-SCDMA terminal test application, the terminal test equipment needs to be able to quickly perform uplink synchronization access and uplink synchronization maintenance. In order to improve the test accuracy, it is necessary to perform high-multiple sampling on the tested uplink signal, and perform high-precision uplink signal synchronization for each time slot under test to find the best sampling starting point. In the prior art, a generally adopted technical solution is to perform uplink synchronizatio...

Claims

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Application Information

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IPC IPC(8): H04W24/00H04W56/00H04B7/26
Inventor 张力张途李海永
Owner TRANSCOM INSTR
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