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Multi-beam signal interleaving digital down-conversion method based on ultra-high-speed analog-to-digital conversion

A technology of digital down-conversion and analog-to-digital conversion, applied in the direction of analog-to-digital converter, multi-frequency modulation conversion, etc., can solve the problem of low computing efficiency, achieve low computing efficiency, high-efficiency filtering function, and meet the effect of high-speed real-time processing speed

Inactive Publication Date: 2017-12-01
CHINA ACADEMY OF SPACE TECHNOLOGY +1
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low matching and low operation efficiency between the A / D output rate and the down-conversion operating rate in traditional digital down-conversion, and proposes a multi-beam signal based on ultra-high-speed analog-to-digital conversion (ADC) Interleaving digital down-conversion method, through the signal interleaving sampling technology of high-speed chips, using parallel DDS structure and polyphase filter structure to realize the down-conversion of digital signals of high-speed data, and move the carrier frequency signal of the radio frequency GHz (up to 8GHz) frequency band to Baseband

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  • Multi-beam signal interleaving digital down-conversion method based on ultra-high-speed analog-to-digital conversion
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  • Multi-beam signal interleaving digital down-conversion method based on ultra-high-speed analog-to-digital conversion

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Embodiment

[0025] The specific implementation process of the present invention will be described by taking the signal digital down-conversion system whose carrier frequency band is radio frequency as an example.

[0026] In the above example, the carrier frequency is radio frequency, and the carrier frequency band is 8GHz. A high-speed analog-to-digital conversion chip EV10AQ190AVTPY is used, and the sampling rate is 4.8Gbps, n=4, m=10, 1.2Gbps.

[0027] Step 1. The signal source sends out a radio frequency band-pass signal with a carrier frequency of 8GHz, and enters the analog-to-digital conversion chip EV10AQ190AVTPY. The maximum sampling rate of this chip is 5Gbps, and the designed sampling rate here is 4.8Gbps;

[0028] Step 2. According to the chip EV10AQ190AVTPY feature design, the four channels of the ADC perform four-way interleaved sampling, and convert one-way serial data with a sampling rate of 4.8Gbps into four parallel interleaved data with a sampling rate of 1.2Gbps. The bi...

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Abstract

The invention relates to a multi-beam signal interleaving digital down-conversion method based on ultra-high-speed analog-to-digital conversion, and belongs to the technical field of microwave signal measurement. The method of the invention utilizes the signal interleaving processing technology of the high-speed chip and the unique parallel structure characteristic of the polyphase filter, and performs both frequency mixing and filtering at one end of the low data processing rate while maintaining a real-time high sampling rate. The signal interleaving of the high-speed analog-to-digital conversion chip realizes the acquisition and analog-to-digital conversion of radio frequency signals, and through the processing of serial-to-parallel conversion, the cost of space is exchanged for fast processing in time.

Description

technical field [0001] The invention relates to a multi-beam signal interleaving digital down-conversion method based on ultra-high-speed analog-to-digital conversion (ADC), and belongs to the technical field of microwave signal measurement. Background technique [0002] In recent years, with the development of high-speed sampling devices, direct sampling of radio frequency bands has become possible. The current development trend of digital receivers is to put the digital-to-analog converter ADC (A / D Converter) as close as possible to the antenna so that it can be digitized as much as possible in the subsequent processing, which requires the A / D to have a high conversion rate, and its The final digital processing device and circuit structure must follow the principles of high efficiency, effectiveness and speed. [0003] Digital down-conversion (DDC) is the first processing work to be completed after A / D sampling, which is also the most difficult and computationally intensi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03D7/16H03M1/12
Inventor 周慧郝时光曹桂兴宋哲王帅罗婧涂水平赵文静
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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