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Wave filter and its filtering method

A technology of filters and filtering parameters, applied in impedance networks, adaptive networks, electrical components, etc., to solve the problems that filters do not support variable bandwidth filtering and cannot achieve filtering.

Active Publication Date: 2007-11-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, the existing filter can only achieve a filtering function of one order, that is, the filter can only support filtering of a signal bandwidth; Extraction, if it is determined that the interpolation value is 2 filtering, the filtering function with an interpolation value of 4 cannot be realized
[0005] It can be seen that the existing filters have technical defects that do not support variable bandwidth filtering

Method used

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  • Wave filter and its filtering method
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  • Wave filter and its filtering method

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Embodiment Construction

[0027] A filter and its filtering method provided by the embodiment of the present invention is to load and cache data according to the configured filter working mode by configuring the filter working mode order, channel number and filter coefficient, and then according to the filter order The number of channels and the number of channels are transferred to the resource pool for calculation to meet the filtering requirements of variable bandwidth.

[0028] The technical solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] Referring to FIG. 3 , it illustrates a structural block diagram of a filter according to an embodiment of the present invention; according to the figure, a filter includes: a scheduling module 1 , a cache module 2 , a resource pool 3 and a result output module 4 .

[0030] Wherein, the scheduling module 1 is used to configure the filter parameter group and filter coeffi...

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Abstract

The filter includes at least following parts: a scheduler module is in use for configuring filtering parameter group of filter, and schedules data according to the said parameter group; a buffer memory module is in use for receiving the input data or outputting data based on schedule of the scheduler module; a resource pool is in use for outputting data to the said buffer memory module, as well as carrying out accumulation operation of arithmetic product for filtering coefficient configured by the scheduler module; a result output module is in use for outputting operated result of the resource pool. The invention also discloses a filtering method. The disclosed filter and the filtering method can support filtering requirement of variable bandwidth of multiple channels and in multiple operational modes in order to meet filtering performances required by different protocols.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a filter and a filtering method thereof. Background technique [0002] A filter is a circuit or device that can pass or block a certain signal frequency. In the intermediate frequency channel, the function of the filter is to filter out the signal of the useless bandwidth in the signal, and retain the signal of the required bandwidth for further signal processing. The chip rates stipulated in various wireless communication protocols are different, so the useful signal bandwidths occupied are also different. For example, the chip rate of the channel in Wideband Code Division Multiple Access (WCDMA) is 3.84 Mbps, the chip rate of the channel in CDMA2000 (Code Division Multiple Access, CDMA) is 1.2288 Mbps, and the Global Interoperability for Microwave Access ( The Worldwide Interoperability for Microwave Access (WiMAX) protocol itself is required to support different bandwidth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H21/00
Inventor 盛兰平
Owner HUAWEI TECH CO LTD
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