Mixing matrix generation method of modulation broadband converter based on stepped random sequence

A technology for modulating wideband and random sequences, applied in the field of mixing matrix generation, it can solve the problem of long sequence length, improve the mixing speed and algorithm speed, and reduce the pressure of hardware implementation and storage.

Active Publication Date: 2020-08-04
HARBIN INST OF TECH
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Problems solved by technology

[0006] The object of the present invention is to solve the mixing sequence in the existing modulated broadband converter system, the sequence length is too long, and the default support set of SOMP is usually more than Practical support set problem, a method of mixing matrix generation for modulated wideband converters based on ladder-type random sequences is proposed

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  • Mixing matrix generation method of modulation broadband converter based on stepped random sequence
  • Mixing matrix generation method of modulation broadband converter based on stepped random sequence
  • Mixing matrix generation method of modulation broadband converter based on stepped random sequence

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Embodiment Construction

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] combine figure 2 and image 3 , the present invention proposes a method for generating a mixing matrix for a modulated wideband converter based on a ladder-type random sequence. For the mixing sequence generated by this matrix, each channel of the sequence has only one element of the sequence whose value is +1 or - 1, and the rest of the positions are 0. The method comprises the steps of:

[0026] Step 1. For a modulated wideband convert...

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Abstract

The invention provides a mixing matrix generation method of a modulation broadband converter based on a stepped random sequence. The method comprises the following steps: step 1, for a modulation broadband converter system with m channels and M mixing sequence lengths, determining a range length d which can be selected by a non-zero position of a sequence which can be generated by each channel, step 2, allocating a range, generating a + / -1 random sequence in a corresponding range, and step 3, setting other elements of the sequence to be 0. According to the method, the length of the frequency mixing sequence is shortened, and a better denoising effect is achieved when a reconstruction support set preset by an SOMP algorithm possibly occurring in a dynamic spectrum is larger than an actual support set. According to the method, only a small section of element in a frequency mixing sequence of each channel is a random sequence, and values of other elements are 0. The method is suitable forthe field of design and application of modulation broadband converters.

Description

technical field [0001] The invention belongs to the technical fields of signal undersampling and wireless communication, and in particular relates to a method for generating a mixing matrix of a modulated broadband converter based on a ladder random sequence. Background technique [0002] In recent years, the theory of compressed sensing has been continuously developed. This theory proves that under the premise of signal sparsity, the simultaneous compression and sampling of the signal can be realized, and then the original signal can be recovered through an appropriate reconstruction algorithm. The undersampling method based on compressed sensing theory can greatly reduce the sampling rate and the required storage and transmission data, breaking through the limit of Quest's sampling theorem, and can be widely used in image processing and signal acquisition and other fields. [0003] Modulated Wideband Converter (MWC) is a new undersampling system for multi-band signals base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30
CPCH03M7/55Y02D30/70
Inventor 张京超刘旺张向鑫彭喜元
Owner HARBIN INST OF TECH
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