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Multi-rate conversion filtering method and device

A rate conversion and multi-rate technology, applied in the field of communication, can solve the problem of increasing resource overhead of editable logic devices

Inactive Publication Date: 2019-09-13
BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a multi-rate conversion filtering method and device to solve the problem of greatly increasing the resource overhead of editable logic devices existing in the prior art

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  • Multi-rate conversion filtering method and device

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Embodiment Construction

[0052] The inventors conducted in-depth research on the problem of greatly increasing the resource overhead of the programmable logic device existing in the prior art.

[0053]Polyphase decomposition technology plays an important role in multi-rate signal processing. Polyphase filter does not refer to a specific filter. It is a deformation of finite impulse response (Finite Impulse Response, FIR) filter, using polyphase decomposition The technology can remove unnecessary calculation operations during the signal rate conversion process, thereby improving the efficiency of the operation. The multi-phase decomposition technology can be applied to integer multiple extraction, integer multiple insertion and fractional multiple rate conversion systems. Taking the decimation multiple of the application scenario as an integer multiple as an example, the polyphase filter applies the polyphase decomposition technology to the FIR filter that needs to be decimated and filtered. The core id...

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Abstract

The invention discloses a multi-rate conversion filtering method and device. The method comprises the following steps: determining a selected input data sequence according to an original input data sequence and a rate conversion multiple of a multi-phase filter; determining input data of each phase, corresponding to the multi-phase filter, of each selected input data in the selected input data sequence; searching a search value corresponding to each bit of the binary value of the input data of each phase according to a constant search sub-table corresponding to the multi-phase filter; and substituting the obtained lookup value into a multiphase output data formula of the multiphase filter to obtain a multirate conversion filtering result. Compared with the prior art, a multiplier is not needed, so that the resource cost of the editable device can be greatly saved. Moreover, due to the fact that a table lookup method is used, one part of multiplication and addition operation is completed in advance, only a result needs to be called, and the calculation delay can be further reduced.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a multi-rate conversion filtering method and device. Background technique [0002] In the more than 20 years since the software radio technology was proposed, it has been widely used in various communication, military and medical fields due to its advantages of high flexibility, strong reconfigurability, and low update cost. The core of this technology is digital signal processing. It is precisely because of the software implementation of digital signal processing that various types of front-ends and basebands are connected. Rate change and filtering play a link in digital signal processing and connect software and hardware. It is an indispensable key technology. [0003] With the increasing demand for communication, the sampling rate of the front-end is getting higher and higher, and some can even reach the GHz level, but the rate of the baseband has not increased corresp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02
CPCH03H17/0273H03H17/0238
Inventor 翁圣晖
Owner BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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