An Orthogonal Analytical Normal Mode Signal Recovery Method
A signal recovery and normal mode technology, applied in advanced technology, baseband system components, digital transmission systems, etc., can solve problems such as communication instability, signal recovery accuracy needs to be improved, and instrument signal recovery accuracy is not high enough to achieve high accuracy , good anti-interference ability, high robustness effect
Active Publication Date: 2022-07-12
江西永磁磁浮科技有限责任公司
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However, it does not take into account that if the signal sources have mutually orthogonal characteristics, the constraints of this method to find the optimal weight vector will change to a certain extent, resulting in a room for improvement in the accuracy of signal recovery, especially in the case of strong noise interference. The recovery accuracy of the lower signal needs to be improved
If the analytical normal mode method is used, the signal recovery accuracy of the instrument using the orthogonality between the signals will not be high enough, and the communication instability will easily occur in the case of a poor communication environment.
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[0093] The core idea of an orthogonal analytical normal mode signal recovery method (Orthogonal Constant Modulus Algorithm, OCMA) of the present invention is to transform the problem of separation, decomposition and restoration of mutually orthogonal normal mode signals into an eigenvalue problem. First, it is assumed that all normal mode signals are mutually orthogonal and independent of each other, and the modulo value is 1. It is assumed that there are several signal sources with the same frequency at different locations in space, sending out signals at the same time. figure 1 Schematic diagram of typical application scenarios of OCMA, such as figure 1 As shown, the signal from the signal source is received by the antenna array. In a typical application scenario of this signal recovery, the signal S in space 1 …S d It represents the signal source, which is transmitted to the antenna X through any direction, and X transmits the received signal to the beamformer for beam...
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An orthogonal analytical normal mode signal recovery method, the method is to optimize and improve the orthogonality of the signal source; the specific steps are: initialize the signal source, and set the signal sources to be recovered to be mutually positive. Use the antenna array to receive the signal, after the antenna receives the signal source S, transmit the signal X=AS for the subsequent steps for correlation processing; use the signal source quadrature and normal mode to recover the signal modulus. And according to the orthogonality of the signal source, new constraints in the signal recovery are given. The Gerchberg-Saxton iteration method is used for signal phase recovery; the average modulus error and bit error rate are used to evaluate the signal recovery performance; the signal recovery is completed, and its Movement into blind equilibrium. The signal recovered by the method proposed in the present invention has higher accuracy, anti-interference ability and less restrictive conditions.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for recovering an orthogonal analytical normal mode signal. Background technique [0002] Blind equalization and blind estimation are important problems in the field of signal processing, and adaptive antenna matrices are usually used to solve such problems. Blind estimation mainly focuses on the estimation of the number of signal sources and the estimation of the angle of arrival of the signal. Blind equalization focuses more on compensating for signal distortion in the channel, and separates and recovers the original signal from the various signals received by the antenna through the antenna array. At present, more and more instruments and equipment in all walks of life use wireless communication to communicate between modules or systems, and a typical application scenario of blind equalization and blind separation is signal processing in wirele...
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Login to View More IPC IPC(8): H04L25/03
CPCH04L25/03006H04L25/03089Y02D30/70
Inventor 樊宽刚刘平川王文帅陈宇航杨杰杨斌
Owner 江西永磁磁浮科技有限责任公司