Wavelet resolution processing method based on angle entropy

A processing method and wavelet decomposition technology, applied in the directions of space transmit diversity, diversity/multi-antenna systems, radio transmission systems, etc., can solve problems such as large errors and multiple access interference, and achieve the effect of improving resolution

Active Publication Date: 2020-03-31
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

However, the non-orthogonal characteristics lead to serious multiple access interference in signal detection compared with the orthogonal signal system, so non-orthogonal multiple access technology is generally used in the power domain, through SI serial interference cancellation detection (SIC) Or Parallel Interference Cancellation (PIC) algorithm for signal detection. Both algorithms have their own advantages and disadvantages. At present, the SIC algorithm is favored because of its simplicity and easy implementation, and has become the preferred solution for non-orthogonal multiple access detection technology. When the number of users is large, due to the cumulative effect of detection errors, the error will become larger and larger, so it is not suitable for occasions with a large number of users

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  • Wavelet resolution processing method based on angle entropy
  • Wavelet resolution processing method based on angle entropy
  • Wavelet resolution processing method based on angle entropy

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Embodiment Construction

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0036] Such as figure 1 Shown, the present invention comprises the following steps:

[0037] S1: Receive multiple sets of signals sent by the base station;

[0038] S2: judging whether the angular interval of the angle of arrival of the first signal and the second signal in the plurality of groups of signals is less than 4 degrees, if less ...

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Abstract

The invention discloses a wavelet resolution processing method based on angle entropy. The wavelet resolution processing method comprises the following steps: receiving multiple groups of signals sentby a base station; judging whether the angle interval of the DOA (direction of arrival) of the first signal and the DOA of the second signal in the multiple groups of signals is smaller than 4 degrees or not, and if so, dividing the first signal and the second signal into one group by adopting angle entropy; and judging whether the power ratio of the grouped first signal to the grouped second signal is 5:5 or 6:4, and if not, distinguishing the first signal and the second signal by adopting a serial interference cancellation detection algorithm. According to the method, grouping is carried out according to the angle entropy, the number of users in each group is reduced, the defect that a traditional wavelet beam forming algorithm cannot be distinguished under the condition that the anglesare close is overcome, an existing wavelet beam forming algorithm is improved, and the resolution of the direction of arrival is improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a wavelet resolution processing method based on angle entropy. Background technique [0002] With the increase in the number of end users and the rapid development of mobile services such as the Internet of Things, the demand for various application fields of wireless networks has shown explosive growth, so wireless communication systems put forward higher requirements for capacity and spectrum utilization. The traditional orthogonal multiple access method is difficult to provide a sufficient number of access users, so non-orthogonal multiple access (NOMA) technology is increasingly used, such as 5G mobile communication systems. However, the non-orthogonal characteristics lead to serious multiple access interference in signal detection compared with the orthogonal signal system, so non-orthogonal multiple access technology is generally used in the power domain, through SI se...

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Application Information

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IPC IPC(8): H04B7/06
CPCH04B7/0617
Inventor 李作洲李新宇庞二强
Owner DALIAN MARITIME UNIVERSITY
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