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Blind self-adaptive beam-forming algorithm

A technology of beamforming and blind self-adaptation, applied in the direction of space transmit diversity, radio transmission system, electrical components, etc., can solve the problems of increasing the complexity of the radio frequency identification system, complex channel estimation, etc., and achieve the reduction of necessity and complexity, Ease of operation and the effect of increasing the reading range

Inactive Publication Date: 2019-04-12
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

Although this can achieve the best effect of the beamforming algorithm, at the same time, this method introduces complex channel estimation, so it will greatly increase the complexity of the RFID system

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Embodiment Construction

[0031] 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 some embodiments of the present invention, but not all of them. Based on the implementation modes in the present invention, all other implementation modes obtained by persons of ordinary skill in the art without creative work, all belong to the scope of protection of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the implementation manners in the present invention, all other implementa...

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Abstract

The invention relates to a blind self-adaptive beam-forming algorithm, and particularly to a blind self-adaptive beam-forming algorithm applied to full-duplex passive ultrahigh-frequency radio frequency identification systems (Passive UHF RFID systems). The algorithm innovatively provides an iterative concept, and thus eliminates necessity and complexity of channel estimation as compared with an original method, an operation process is simple, costs of system running are greatly reduced, and efficiency is improved at the same time.

Description

technical field [0001] The invention relates to a blind adaptive beamforming algorithm applied to a full-duplex passive UHF radio frequency identification system. Background technique [0002] At present, UHF radio frequency identification technology has received widespread attention. This technology uses a frequency of 860-960 MHz and can be applied in many fields, such as: supply chain management, logistics support system, automatic toll collection system, intelligent transportation system, etc. etc., its recognition efficiency is higher than traditional barcode system. [0003] Passive UHF RFID systems (PassiveUHF RFIDsystems) usually include several modules: readers, tags, and data processing centers. Among them, there are usually multiple antennas in the reader and only one antenna in the tag. In this system, the tag is not powered by a battery, but works by absorbing the energy carried by the electromagnetic field emitted by the transmitting antenna on the reader. I...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B7/08
CPCH04B7/0617H04B7/086
Inventor 刘竞升王晓东
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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