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Dimensionality-reduction circular and non-circular mixed signal DOA estimation method based on MUSIC algorithm

A mixed-signal, non-circular signal technology, used in direction finders using radio waves, radio wave direction/bias determination systems, etc., can solve the problems of high complexity and low accuracy

Inactive Publication Date: 2019-03-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] Although few circular and non-circular mixed signal estimation methods exist today, most of them are relatively complex and not too accurate

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  • Dimensionality-reduction circular and non-circular mixed signal DOA estimation method based on MUSIC algorithm
  • Dimensionality-reduction circular and non-circular mixed signal DOA estimation method based on MUSIC algorithm
  • Dimensionality-reduction circular and non-circular mixed signal DOA estimation method based on MUSIC algorithm

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Embodiment Construction

[0092] The invention discloses a method for estimating DOA (Direcion of Arrival) of a dimension-reducing circular and non-circular mixed signal based on a MUSIC (Multiple Signal Classification) algorithm. The present invention, on the basis of classic MUSIC, develops a DOA estimation method for mixed modulation signals with circular and non-circular characteristics. The method can utilize the characteristics of circular and non-circular to effectively improve the performance of DOA estimation. And it can distinguish the circular signal and non-circular signal in the mixed signal. The method proposed by the invention reduces the search of two-dimensional spectral peaks to one-dimensional, which greatly reduces the complexity of the algorithm. From the simulation results, it can be seen that the performance of the method disclosed in the present invention is much better than that of the classic MUSIC algorithm, and at the same time, the complexity is much smaller than that of th...

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Abstract

The invention discloses a dimensionality-reduction circular and non-circular mixed signal DOA estimation method based on a MUSIC algorithm. Based on classical MUSIC, the method capable of conducting DOA estimation on mixed modulating signals with circular and non-circular characteristics is developed. The method can utilize the circular and non-circular characteristics, the DOA estimation performance is effectively improved, and the circle signal and the non-circle signal in the mixed signals can be distinguished. By means of the method, two-dimensional spectrum peak search is reduced into one-dimensional spectrum peak search, and the complexity of the algorithm is greatly reduced. Through a simulation result, the performance of the method is much higher than the performance of the classical MUSIC algorithm, and the complexity is much lower than that of the classical MUSIC algorithm, and along with increasing of the amount of the non-circular signals in the mixed signals, the overall DOA estimation performance of the mixed signals is improved.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a method for estimating DOA of a circular and non-circular mixed signal with dimensionality reduction based on a MUSIC algorithm. Background technique [0002] In actual communication, many common narrowband signals are circular signals, such as QPSK signals. In addition, in modern wireless communication, non-circular signals, such as BPSK and AM signals, are often used. In array signal processing, the performance of DOA estimation is improved according to the non-circular statistical properties of the incident signal. [0003] In actual communication scenarios, some users send modulated signals with non-circular characteristics and some users transmit modulated signals with circular characteristics. When users send modulated signals with only non-circular characteristics or circular characteristics, and the receiver receives When a single modulation...

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 孙友张小飞时娜施展徐乐
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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