Unlock instant, AI-driven research and patent intelligence for your innovation.
Method for obtaining sensing matrix of pulse sequence random demodulation hardware system
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A random demodulation, hardware system technology, applied in the field of signal processing, can solve problems such as system deviation, and achieve the effect of reducing deviation, computing content and influencing factors
Pending Publication Date: 2020-11-06
HARBIN INST OF TECH
View PDF5 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0004] The present invention solves the problem that the parameters used in the existing method for obtaining the perception matrix of the random demodulation hardware system for the pulse sequence are ideal, which causes deviations from the actual system. The present invention provides a method for obtaining the random pulse sequence The method for demodulating the perception matrix of the hardware system, the present invention provides the following technical solutions:
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment 1
[0043] Such as figure 1 As shown, the present invention provides a method for obtaining the perception matrix of the pulse sequence random demodulation hardware system, comprising the following steps:
[0044] A method for obtaining a pulse sequence random demodulation hardware system perception matrix, comprising the following steps:
[0045] Step 1: Determine the input signal of the pulse sequence random demodulation hardware system, and set the initial time shift parameter value;
[0046] The step 1 is specifically: determine the input signal of the pulse sequence random demodulation hardware system, and express the input signal s of the pulse sequence random demodulation hardware system by the following formula i (t):
[0047] the s i (t)=g(t-t i )
[0048] Among them, t is the time shift parameter value, g(t) is a single pulse signal, and i is an initialization count variable;
[0049] Set the initial time shift parameter value, the time shift parameter step value i...
specific Embodiment 2
[0074] In order to verify the effectiveness of the method, the following experiments are carried out to verify.
[0075] The measured signal is set to a pulse sequence consisting of four Gaussian pulses, a method for obtaining the perception matrix of the pulse sequence random demodulation hardware system, characterized in that it comprises the following steps:
[0076] Step 1: Set the input signal of the system to s i (t)=g(t-t i ), the initial time shift parameter value is t=t 1 (The starting time shift parameter value is t 1 It is necessary to ensure that the single pulse signal g(t) is completely within the effective sampling time), the time shift parameter step value is Δt, the amplitude is 1, the number of calculated time shifts is N, the initialization count variable is i, and the perception matrix is Φ;
[0077] Step 2: Set the initial value of the pseudo-random sequence signal and keep it unchanged;
[0078] Step 3: Uniformly sample the system output signal, the...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention relates to a method for obtaining a sensing matrix of a pulse sequence random demodulation hardware system, which belongs to the field of signalprocessing. The method comprises the steps of determining an input signal of a pulse sequence random demodulation hardware system, and setting an initial time shift parameter value, uniformly sampling output signals of the pulse sequence random demodulation hardware system at the sampling rate and sampling time the same as those of the pulse sequence random demodulation hardware system to obtain a sampling value, carrying out FFT on theobtained sampling value to obtain a frequency domain value of the sampling value, removing the influence of an actual filter from the frequency domain value of the sampling value to obtain the frequency domain of the sampling value without the influence of the actual filter, and changing the counting variable and the time shift parameter to obtain a sensing matrix. According to the method, the deviation during theoretical calculation is reduced, and the method better conforms to the characteristics of an actual system. Therefore, the operation content and influence factors are greatly reduced.
Description
technical field [0001] The invention relates to the technical field of signalprocessing, and relates to a method for obtaining a perception matrix of a pulse sequence random demodulation hardware system. Background technique [0002] Richard Baraniuk of Rice University and his research team proposed a random demodulation (Random Demodulation, RD) system in 2006, which is a technology and method that extends the compressive sensing theory to the analog domain, mainly for compressive sampling of multi-frequency point signals , whose structure is as figure 1 As shown, it mainly includes four parts: frequency mixing, low-pass filtering, uniform sampling, and signal reconstruction. The signal processing flow is as follows: the analog signal is first multiplied by a pseudo-random sequence in an analog multiplier to achieve frequency mixing, and then filtered by an analog low-pass filter. Finally, a traditional low-speed ADC is used for sampling to obtain a series of observations...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More