Programmable cascade CIC decimation filter

A technology of decimation filter and decimator, applied in the direction of impedance network, digital technology network, electrical components, etc., can solve the problems of high power consumption, large area, etc., to reduce area, reduce power consumption, solve the problem of fixed extraction multiple and The effect of fixed bandwidth

Active Publication Date: 2022-02-18
58TH RES INST OF CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] The purpose of the present invention is to provide a programmable cascaded CIC decimation filter to solve the problems of large area and high power consumption in the traditional technology, and also realize the programmable decimation multiple

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  • Programmable cascade CIC decimation filter
  • Programmable cascade CIC decimation filter
  • Programmable cascade CIC decimation filter

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Embodiment Construction

[0061] A programmable cascaded CIC decimation filter proposed by the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0062] The present invention provides a programmable cascaded CIC decimation filter, based on nibble algorithm, its structure is as follows figure 2 As shown, it includes an encoder, an integrator, a decimator, a comb, a combiner, a truncation device and a programmable control module, each module contains a data port, and the data port is used for clock input and data input and output; where , the integrator is an N-stage integrator, the decimator is a D-...

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Abstract

The invention discloses a programmable cascade CIC decimation filter, which belongs to the field of digital down conversion and comprises a cascade integrator comb decimation filter and a programmable control module. The cascaded integrator comb decimation filter comprises six parts, namely an encoder, an integrator, a decimator, a comb-shaped device, a combiner and a cutting device. The data input end of the programmable cascade CIC decimation filter is connected with the encoder; the output end of the encoder is connected with the input end of the integrator; the output end of the integrator is connected with the input end of the decimator; the output end of the decimator is connected with the input end of the comb-shaped device; the output end of the comb-shaped device is connected with the input end of the combiner; the output end of the combiner is connected with the input end of the cutting device; and the clock output end of the programmable control module is connected with the clock input ends of the encoder, the integrator, the decimator, the comb-shaped device and the combiner.

Description

technical field [0001] The invention relates to the technical field of digital down-conversion, in particular to a programmable cascaded CIC decimation filter. Background technique [0002] In a wireless communication network, DDC (Digital Down Converter, digital down conversion) technology is to down-sample an intermediate frequency digital signal with a high data rate to an intermediate frequency signal with a low data rate. It is widely used in the fields of satellite communication, mobile communication, radar detection and broadcast communication. [0003] DDC mixes the intermediate frequency signal with the carrier signal generated by the oscillator. After mixing, the center spectrum of the signal is moved to the low frequency, and then restored to the original signal through decimation and filtering. During sampling and quantization by an ADC (Analog to Digital Converter, high-speed analog-to-digital converter), sampling is usually performed at a frequency whose sampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/06
CPCH03H17/0671
Inventor 万书芹邵杰高敏陈婷婷卓琳张沁枫
Owner 58TH RES INST OF CETC
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