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2-bit sampling quantization system and method suitable for broadband radio frequency signal spectrum estimation

A radio frequency signal, sampling and quantization technology, applied in the field of spectrum estimation, can solve problems such as high cost and complex hardware, and achieve the effects of reducing the number of quantization bits, suppressing high harmonics, and improving the spectrum estimation effect

Active Publication Date: 2022-02-18
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology

[0005] Aiming at the problem of complex hardware and high cost of the full-band digital sampling receiver, the present invention reduces the complexity and cost of the hardware by reducing the number of quantization bits of the analog-to-digital converter (to 2-bit quantization), and proposes a corresponding spectrum estimation circuit structure And processing method, suppress the high harmonic component brought by low quantization bit number, ensure a certain dual-tone dynamic range, and realize instantaneous multi-signal detection

Method used

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  • 2-bit sampling quantization system and method suitable for broadband radio frequency signal spectrum estimation
  • 2-bit sampling quantization system and method suitable for broadband radio frequency signal spectrum estimation
  • 2-bit sampling quantization system and method suitable for broadband radio frequency signal spectrum estimation

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Embodiment 1

[0045]In view of the complex sampling and quantization system, low sampling efficiency, high cost, and high harmonic component interference existing in the prior art, this embodiment optimizes and adopts the optimized technical solution to solve the problems in the prior art.

[0046] Specifically, this embodiment discloses a 2-bit sampling quantization system suitable for wideband radio frequency signal spectrum estimation, including:

[0047] A power divider is used to divide the broadband analog signal into two signals, which are respectively used for detection processing and conversion processing;

[0048] The low-pass processing branch is connected to the power splitter and used to receive one of the signals, and is used to perform detection processing, low-pass filtering processing and low-rate analog-to-digital conversion processing on the signal;

[0049] 2-bit analog-to-digital conversion branch, connected to the power divider and used to receive another signal, and u...

Embodiment 2

[0057] The content of the above-mentioned embodiment discloses a system for performing 2-bit quantized sampling. This embodiment discloses a corresponding sampling method, which is realized by using the above-mentioned disclosed system. Specifically, the method disclosed in this embodiment is as follows:

[0058] A 2-bit sampling quantization method suitable for spectrum estimation of wideband radio frequency signals, including:

[0059] S1. Process the broadband analog signal and divide it into two signals;

[0060] S2. Perform detection processing and low-pass filtering processing on one of the signals to obtain a video signal;

[0061] S3. Sampling and quantizing the video signal, and outputting a power information video sampling signal;

[0062] S4. Perform 2-bit quantized sampling on another signal and output a 2-bit quantized signal directly sampled by radio frequency;

[0063] S5. Perform digital signal spectrum estimation processing on the power information video sam...

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Abstract

The invention relates to the technical field of signal sampling processing, in particular to a 2-bit sampling quantization system and method suitable for broadband radio frequency signal spectrum estimation. The system comprises a power divider which is used for dividing a broadband analog signal into two signals for detection processing and conversion processing; a low-pass processing branch which is connected with the power divider and is used for receiving one signal and carrying out detection processing, low-pass filtering processing and low-rate analog-to-digital conversion processing; a 2-bit analog-to-digital conversion branch which is connected with the power divider and is used for receiving the other signal and carrying out 2-bit quantitative sampling processing; and a digital signal processing module which is connected with the low-pass processing branch and the 2-bit analog-to-digital conversion branch and receives the signal processing results of the low-pass processing branch and the 2-bit analog-to-digital conversion branch for processing so as to obtain a power spectrum estimation result. According to the present invention, the complete phase amplitude information is extracted from analog signals, the signal power spectrum is completely estimated, the quantization bits, the hardware complexity and the cost are reduced, high harmonics brought by low quantization bits are restrained, and a better spectrum estimation effect is achieved.

Description

technical field [0001] The invention relates to the technical field of spectrum estimation, in particular to a 2-bit sampling quantization system and method suitable for wideband radio frequency signal spectrum estimation. Background technique [0002] In the fields of civilian spectrum management and military electronic warfare, both are faced with the problem of too large surveillance spectrum bandwidth. Currently there are usually three solutions. The first is a sweeping receiver scheme, which is based on a narrowband receiver combined with frequency domain search to realize wideband spectrum monitoring. The instantaneous bandwidth of the frequency scanning receiver is narrow, and it takes a certain amount of time to complete the entire spectrum scanning, so there is a certain probability of missing alarms. This scheme is often used in civilian fields with a high tolerance for missed alarms. The second scheme is a full-band digital sampling receiver. In this scheme, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/167
CPCG01R23/167Y02D30/70
Inventor 易舟维董自通朱萸朱劼昊方剑李其勤曹卫星
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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