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Detection Synchronization Method of Time Division Synchronous Code Division Multiple Access Digital Repeater

A code division multiple access and time division synchronization technology, applied in the communication between multiple stations, transmission control/equalization and other directions, can solve the problems of complex implementation, high implementation cost, high cost, reduce marginal cost and reduce equipment Cost, to achieve the effect of simple principle

Inactive Publication Date: 2011-12-07
COMBA TELECOM TECH (GUANGZHOU) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The synchronous control module added separately above exists in a hardware synchronous manner, and its purpose is to W PTS searches and finally achieves synchronization. This synchronization method is complicated and costly to implement, so the cost is relatively high, which brings certain pressure to the operator's engineering implementation.

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  • Detection Synchronization Method of Time Division Synchronous Code Division Multiple Access Digital Repeater
  • Detection Synchronization Method of Time Division Synchronous Code Division Multiple Access Digital Repeater
  • Detection Synchronization Method of Time Division Synchronous Code Division Multiple Access Digital Repeater

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Embodiment Construction

[0044] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0045] see Figure 4 , the detection synchronization method of the time division synchronous code division multiple access digital repeater can be integrated into the FPGA chip of the digital board of the existing TD-SCDMA digital optical fiber repeater in the form of software through programming, and the TD-SCDMA signal can be detected Synchronization, to realize the uplink and downlink switching of TD-SCDMA digital optical fiber repeater.

[0046] Such as Figure 4 As shown, a time division synchronous code division multiple access digital optical fiber repeater includes near-end equipment and far-end equipment, and the near-end equipment includes filters, circulators, frequency conversion modules, digital boards and optical receiving / transmitting devices that act as switches. Remote equipment includes digital board, frequency conversion module, power amp...

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Abstract

The invention relates to a detection synchronization method of a time-division synchronous code division multiple access digital repeater, which specifically includes the following steps: a. baseband I / Q signals obtained through signal processing are subjected to baseband detection processing, and by detecting baseband signal power, obtained The detection signal; b. Debounce filtering is performed on the detection signal to filter out the jitter of the signal; c. The filtered signal is searched and judged for downlink synchronization according to the envelope characteristics of the downlink synchronization code, and the downlink synchronization indication signal is output after the discrimination; d. According to The downlink synchronization indication signal generates a corresponding downlink synchronization control signal. The realization process of the present invention is very simple, and it is convenient to implement in the form of software, which is convenient for large-scale production, thereby reducing production cost and facilitating technical transformation.

Description

【Technical field】 [0001] The invention relates to the field of mobile communication repeaters, in particular to a detection synchronization method of a time-division synchronous code division multiple access digital repeater. 【technical background】 [0002] Time Division-Synchronous Code Division Multiple Access (TD-SCDMA for short) technology is one of the three main standards of the third generation mobile communication approved by the International Telecommunication Union (ITU) and 3GPP. TD-SCDMA is called a low chip rate (1.28MCps, 1.28M chips / second) time division multiplexing counting scheme in the ITU standard. [0003] see figure 1 , A basic time unit of TD-SCDMA is a wireless frame, the frame length is 10ms, each wireless frame is divided into two 5ms subframes, and the structures of the two subframes are exactly the same. A single subframe consists of 7 regular time slots (TS0 to TS6) of the same length and three special time slots (D W PTS, GP and U P PTS). ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005H04B7/26
Inventor 赖文强金淮东
Owner COMBA TELECOM TECH (GUANGZHOU) CO LTD