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Parameter driving controlled cell searching device

A cell search and drive controller technology, applied in radio transmission systems, code division multiplexing systems, electrical components, etc., to solve problems such as increased interference and reduced signal level

Inactive Publication Date: 2005-11-23
ACCTON TECHNOLOGY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

like Figure 4a and Figure 4b Shows the result of reduced signal level and increased inter-chip interference due to the effect of chip sampling frequency offset due to frequency offset

Method used

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  • Parameter driving controlled cell searching device
  • Parameter driving controlled cell searching device
  • Parameter driving controlled cell searching device

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Embodiment Construction

[0060] Please refer now Figure 5 , Figure 5 An embodiment of a parameter-driven control cell search device according to the present invention is shown. A cell search device 500, mainly comprising: a pre-processing device 510; a first-stage processing device 520; a second-stage processing device 530; a third-stage processing device 540; a post-processing device 550; Controller (parameter driven controller) 560. The pre-processing device 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 device 520 is connected to the pre-processing device for obtaining time slot synchronization of the incoming signal. The second-stage processing device 530 is connected to the pre-processing device for obtaining code group and frame synchronization of the incoming signal. The third-stage processing device ...

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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, and more particularly relates to a device for wideband code division multiple access (W-CDMA) The cell search device of the system adopts a parameter driven controller to form a working platform in which different cell search methods can be used and the switching of different cell search methods can be controlled in real time. Background technique [0002] CDMA cellular systems (cellular systems) using a direct sequence spread spectrum code division multiple access (DSCS) technology are characterized by greatly increased channel capacity. This system has attracted considerable attention in recent research on mobile communication systems. Generally speaking, due to the nature of frequency reuse, the bandwidth efficiency of CDMA systems is superior to that of other multitasking access systems (such as frequency division multiple access and time divis...

Claims

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Application Information

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