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Features window detecting device and method capable of working under rapid AGC mechanism

A detection device and detection method technology, which are applied in the direction of shaping network, baseband system components, network traffic/resource management in transmitter/receiver, etc. Synchronizing time, avoiding effects

Inactive Publication Date: 2010-01-27
MARVELL TECH SHANGHAI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, since the adjustment period of the fast AGC mechanism is very short, applying the traditional feature window detection under the fast AGC mechanism will cause the problems described below

Method used

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  • Features window detecting device and method capable of working under rapid AGC mechanism
  • Features window detecting device and method capable of working under rapid AGC mechanism
  • Features window detecting device and method capable of working under rapid AGC mechanism

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Embodiment Construction

[0044] The present invention will now be described in conjunction with preferred embodiments of the invention with reference to the accompanying drawings. However, those skilled in the art should understand that the present invention is not limited to these preferred embodiments, but covers alternatives, modifications, and / or equivalents included within the spirit and scope of the present invention as defined by the appended claims. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may also be practiced without some or all of these specific details. In other instances, well known mechanisms have not been described in detail in order to avoid unnecessarily obscuring the present invention.

[0045] Here, it should be noted that like reference numerals denote like parts in the respective drawings. The various figures shown and described herein are used to illustrate ...

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Abstract

The present invention provides a features window detecting device and method capable of working under a rapid AGC mechanism. The features window detecting device comprises: a shifter configured to shift each one code primary energy data which are input and gained adjustment based on a shift factor, and to output the corrected energy data, wherein the shift factor represents g<n-1> to g<n> / 3; a first circulating register configured to receive and cache the primary energy data one by one of codes; a second circulating register configured to receive and cache the corrected energy data one by one of codes; a switch controller configured to carry out switching control C according to the gain adjustment period, so as to make the first and the second registers interchange at intervals of gain adjustment period; and a features window ratio calculator configured to read the corrected energy data, and calculate the features window ratio corresponding to each code energy data according to the data.

Description

technical field [0001] The invention relates to a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, in particular to a characteristic window detection (CWD) device and method in the TD-SCDMA system that can work under the fast automatic gain control (AGC) mechanism. Background technique [0002] In the TD-SCDMA system, CWD is well known as an effective way for user equipment (UE) to obtain coarse timing synchronization of a cell, and is widely adopted by manufacturers. CWD is based on the following principle: the downlink synchronization code SYNC_DL in the DwPTS time slot (downlink pilot time slot) (to be described later) in each TD-SCDMA subframe has energy higher than its left and right adjacent guard intervals, which A unique energy shape is formed within each subframe length. By detecting the energy shape, the start position of the downlink synchronization code SYNC_DL can be detected, thereby obtaining the rough timing synchronization of the c...

Claims

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Application Information

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IPC IPC(8): H04W24/00H04W28/14H04W52/52H04W52/58H04L25/03H04B1/707
Inventor 陈晓春刘石朱仕轶尹小俊周璇
Owner MARVELL TECH SHANGHAI
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