A signal synthesis method and system

A signal synthesis and signal technology, applied in the field of sensor networks, can solve the problem of not being able to optimize the convergence speed and synthesis loss at the same time

CN106973023BActive Publication Date: 2019-10-01INST OF ACOUSTICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-10-01

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Abstract

The invention discloses a signal synthesis method and system. The method comprises the following steps: establishing an objective function of a synthetic signal and an iterative function of a synthetic weight, wherein the iterative function of the synthetic weight contains calculation factors; calculating the calculation factors based on the objective function of the synthetic signal and the iterative function of the synthetic weight; and determining the synthetic signal according to a calculation result of the calculation factors. The system comprises a first calculation module, a second calculation module and a synthesis module. According to the signal synthesis method and system disclosed by the invention, the objective function of the synthetic signal and the iterative function of the synthetic weight are established, the calculation factors in the iterative function are calculated, and thus the synthesis loss can be reduced and the synthetic signal with good performance can be obtained while rapid convergence can be achieved.
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Description

technical field

[0001] The invention relates to the technical field of sensor networks, in particular to a signal synthesis method and system. Background technique

[0002] With the continuous development of sensor technology, the use of sensor networks to synthesize the received signals from multiple sensors has become one of the most effective methods to improve the signal-to-noise ratio. The sensor network uses multiple sensor nodes to receive the same signal, and uses the coherence of the signal and the incoherence of the noise to perform weighted synthesis of the received signal, thereby improving the quality of the received signal.

[0003] A SUMPLE algorithm is proposed in the article "The Sumple Algorithm for Aligning Arrays of Receiving Radio Antennas: Coherence Achieved with Less Hardware and Lower Combining Loss" published by D.H.Rogstad et al. A ProposedMatrix-Free signal combining Method (PMFM) algorithm was proposed in the article "Fast Eigen-Based Signal Comb...

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Embodiment Construction

[0038] The technical solutions of the present invention will be described in further detail below with reference to the drawings and embodiments.

[0039] figure 1 It is a schematic flowchart of a signal synthesis method provided by an embodiment of the present invention. Such as figure 1 As shown, the method includes steps 101-103:

[0040] Step 101, establishing an objective function for synthesizing signals and an iterative function for synthesizing weights.

[0041] First, the received signal is first modeled as:

[0042]

[0043] in, Indicates the signal received by the i-th sensor at the k-th moment, i=1,2,...,N, N is the total number of sensors, and k is the time variable of the sampling point; Indicates the source signal received by the i-th sensor at the k-th moment; In order to represent the noise received by the i-th sensor at the k-th moment, the superscript s represents and There is a corresponding relationship and the upper triangle mark ^ indicate...