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Ultra-broadband analogue signal parallel sampling system based on accidental projection

An analog signal and sampling system technology, applied in the field of signal processing, can solve the problems of limiting the application scope of AIC sampling system, not having generality, etc., to avoid the difficulty of selection and design, to realize many ways, and to realize the effect of simple circuit.

Inactive Publication Date: 2008-08-20
XIDIAN UNIV
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Problems solved by technology

However, since the AIC architecture requires the signal to be sampled to have sparse characteristics in a measurable transform domain, it limits the application range of the AIC sampling system to a large extent, making it not general.

Method used

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  • Ultra-broadband analogue signal parallel sampling system based on accidental projection
  • Ultra-broadband analogue signal parallel sampling system based on accidental projection
  • Ultra-broadband analogue signal parallel sampling system based on accidental projection

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Embodiment

[0031] Simulation conditions:

[0032] (1) Assume that the highest frequency of the UWB signal x(t) after a certain frequency band preprocessing is 2 GHz, and the time domain length of the signal is 2.5 ns, such as Figure 5 shown.

[0033] (2) According to the Nyquist sampling law, in order not to lose information, the sampling rate must be at least 4GHz, so the sampling interval is selected T = 1 4 GHz = 0.25 ns .

[0034] (3) Set the number of parallel channels M=10, that is, use 10 channels to carry out parallel sampling of this ultra-wideband signal, so the sampling rate of each channel can be reduced to That is 400MHz.

[0035] (4) Set 10 m-sequence generators to generate 10 sets of pseudo-random sequences p 1 (t)~P 10 (t), and determine a set of fixed seed values ​​to make the generated pseudo-random sequence controllable. The 10 pse...

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Abstract

The present invention discloses a parallel sampling system basing on the super-wideband which is projected randomly, and the invention mainly settles the problem of complex realization and no suitability for processing the common super-wide band in the homogeneous system. The system is mainly composed of a function generating module, a parallel sampling module and a linear operating module. In the system the function generating module adopts a pseudorandom sequence generating module for generating a group of pseudorandom sequence for inputting to the parallel sampling module. The parallel sampling module realizes the projection operation of the upper-wide band analog signal on the self-contained pseudorandom space and obtains the digital projection coefficient signal for inputting to the linear operating module. The linear operating module adopts the M-input and M-output linear structure and conveys the output projection coefficient signal of the parallel sampling module to the parallel digital sampling signal and then outputs. The invention has the advantages of low complexity in the circuit operation, being easily realized and broad applying sphere. The invention can be used for executing digitization sampling processing to the super-wideband signal.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a parallel digital sampling method for ultra-wideband analog signals. Background technique [0002] Due to the advantages of high information carrying capacity and high anti-interference ability, ultra-wideband signals are widely used in communication, ultrasonic detection, radar and other fields. At the same time, the digital processing technology of UWB signals is getting more and more attention. This stimulates the development of sampling techniques for UWB signals. Due to the limitations of the traditional Nyquist sampling theorem, if the sampling system constructed by a single analog-to-digital converter ADC is applied to the sampling of ultra-wideband signals, the sampling rate is usually very high, and in many cases it will reach 10 9 Hertz, that is, the degree of GHz. This makes it difficult to realize digital sampling of ultra-wideband signals us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/69H03M1/12
Inventor 石光明陈旭阳张犁王良君
Owner XIDIAN UNIV
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