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Parameter driving controlled honeycomb searching device

A cellular and parametric technology, applied in the direction of selection devices, code division multiplexing systems, radio transmission systems, etc., can solve problems such as increased interference and lower signal levels

Inactive Publication Date: 2003-12-03
ACCTON TECHNOLOGY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As shown in Figure 4a and Figure 4b, under the effect of the chip sampling frequency offset caused by the frequency offset, the signal level decreases and the inter-chip interference increases.

Method used

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  • Parameter driving controlled honeycomb searching device
  • Parameter driving controlled honeycomb searching device
  • Parameter driving controlled honeycomb searching device

Examples

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Embodiment Construction

[0058] Please refer to FIG. 5 , which shows an embodiment of a parameter-driven control cell search device according to the present invention. A cell search device 500, mainly comprising: a pre-processing mechanism 510; a first-stage processing mechanism 520; a second-stage processing mechanism 530; a third-stage processing mechanism 540; a post-processing mechanism 550; Controller (parameter driven controller) 560. The pre-processing unit 510 is used for analog-digital processing and sampling mode selection for an incoming signal from the base station, wherein the incoming signal has a carrier frequency uncertainty range due to frequency offset. The first-stage processing mechanism 520 is connected to the pre-processing mechanism for obtaining time slot synchronization of the incoming signal. The second-stage processing unit 530 is connected to the pre-processing unit for obtaining code group and frame synchronization of the incoming signal. The third-stage processing mecha...

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Abstract

A parameter driven and controlled cellular searcher for CDMA receiving system is composed of a preprocessing unit for A / D conversion of an incoming signal and choosing its sampling mode, the stage-1 processing unit for obtaining its time slot synchronization, the stage-2 processing unit for obtaining its code group and code frame synchronization, the stage-3 processing unit for obtaining its disturb codes, a post-processing unit for judging if its cellular search procedure is successful, and a parameter drive controller for controlling the cellular search procedure. Its advnatages are real-time control and selective optimal combination of mechanisms or methods.

Description

technical field [0001] The present invention relates to a cell search device for a code division multiple access (CDMA) system, more particularly to a device for wideband code division multiple access (WCDMA) -CDMA) system cell search device, the device adopts a parameter driven controller (parameter driven controller) to form a working platform, can use different cell search methods in it and control the switching of different cell search methods in real time (real time). Background technique [0002] The CDMA cellular systems using a direct sequence spread spectrum code division multiple access (DSCDMA) technology are characterized by greatly increasing the channel capacity. This system has attracted considerable attention in recent research on mobile communication systems. Generally speaking, due to the nature of frequency reuse (frequency reuse), the bandwidth efficiency (bandwidth efficiency) of the code division multitasking access system is compared with other multit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7083H04B7/216
Inventor 何建兴沈文和
Owner ACCTON TECHNOLOGY CORPORATION
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