Device and method for expanding dynamic range of analog-to-digital converter (ADC)

An analog-to-digital converter and dynamic range technology, which is applied in the field of digital communication, can solve the problems of limited dynamic range, nonlinearity and quantization noise, and achieve the effects of high dynamic range, no signal bandwidth limitation, and cost reduction

Active Publication Date: 2014-10-15
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the dynamic range is limited by nonlinearity and quantization noise in the analog-to-digital converter sampling of broadband signals, and to provide a device and method for improving the dynamic range of the analog-to-digital converter

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  • Device and method for expanding dynamic range of analog-to-digital converter (ADC)
  • Device and method for expanding dynamic range of analog-to-digital converter (ADC)
  • Device and method for expanding dynamic range of analog-to-digital converter (ADC)

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Embodiment Construction

[0035] Describe technical scheme of the present invention in further detail below in conjunction with accompanying drawing: as figure 1 As shown, a device for improving the dynamic range of an analog-to-digital converter is characterized in that it includes an AGC power division module, an analog-to-digital converter ADC1, a digital phase shift gain module, an analog delayer 1, a high dynamic digital-to-analog conversion module, Adder, filter amplification module, analog delayer 2, analog-to-digital converter ADC2, digital delayer, combiner, parameter search / estimation module and control interface, the two outputs of the AGC power division module are respectively connected to the analog-to-digital converter ADC1 is connected to the analog delayer 1, the output of the analog-to-digital converter ADC1 is connected to the digital phase-shift gain module, and the output of the digital phase-shift gain module is respectively connected to the digital-to-analog converter DAC1 and the ...

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Abstract

The invention discloses a device and a method for expanding a dynamic range of an analog-to-digital converter (ADC). The device comprises an AGC (automatic gain control) power splitting module, an ADC1, a digital phase-shift gain module, an analog time delay 1, a high-dynamic digital-to-analog conversion (DAC) module, an adder, a filter amplifier module, an analog time delay 2, an ADC2, a digital delay, a coupler, a parameter research / estimation module and a control interface. By means of nonlinear devices, nonlinear component of final output signals is reduced while risk in signal processing is lowered. Wide dynamic range is achieved through the low-performance ADCs and the low-cost DAC. Feedback forecasting circuits are omitted, thus the robustness is improved while signal bandwidth limitation is eliminated.

Description

technical field [0001] The present invention relates to a device and method for converting an analog signal to a digital signal in the field of digital communication, in particular to a device and method for improving the dynamic range of an analog-to-digital converter. Background technique [0002] In digital communication, the analog-to-digital converter is responsible for the mapping from the analog domain to the digital domain, and the dynamic range of the analog-to-digital converter directly limits the highest signal-to-noise ratio that can be obtained in the digital domain. Therefore, how to improve the dynamic range of the analog-to-digital converter has become a key point in digital communication. [0003] There are three main existing methods aimed at improving the dynamic range of ADCs: [0004] Pre-logarithmic amplifier: The analog signal is passed through a logarithmic amplifier before the ADC, and the high-level signal is compressed to within the maximum range ...

Claims

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Application Information

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IPC IPC(8): H03M1/10
Inventor 鲁宏涛徐强邵士海潘文生唐友喜
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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