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A Fast LMS Adaptive Beamforming Method

An adaptive beam, fast technology, applied in the field of communication, to achieve the effect of solving the convergence speed

Inactive Publication Date: 2018-11-02
浙江荣通微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention mainly solves some technical problems existing in the prior art that some variable-step-size LMS algorithms still cannot well solve the contradictions between the convergence speed, tracking speed and convergence precision of the fixed-step-size self-adaptive filtering algorithm, and provides a A fast LMS adaptive beamforming calculation method applied to 60GHz wireless communication system, which can ensure convergence accuracy while having high convergence speed and tracking speed

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  • A Fast LMS Adaptive Beamforming Method
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  • A Fast LMS Adaptive Beamforming Method

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Embodiment

[0026] Embodiment: A fast LMS adaptive beamforming method of this embodiment, such as figure 1 As shown in the figure, the process is to initialize the weight value after the program is started, and determine the initialization conditions of the algorithm; then the program starts to obtain the values ​​of the input signal and the reference signal, filter the signal, estimate the error and change the step size, and calculate the weight value update vector. And judge whether it converges, if it does not converge, return to filter the output, if it converges, the algorithm ends. X(n) needs to be updated after each return, and the reference signal d(n) should also be fine-tuned as needed.

[0027] figure 2 It is a structural block diagram of the smart antenna adaptive beamformer based on the fast LMS algorithm. Signals X(n) from antenna 1,...antenna n generate weight vector W after fast LMS algorithm 1 ,...,W n . The input signal X is then filtered by the weight vector W to...

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Abstract

The invention discloses a rapid LMS adaptive beam forming method and aims to disclose a beam forming method that is rapid in calculation and small in steady state maladjustment. According to the method, firstly, the weight initialization is performed, and the algorithm initialization condition is determined. Secondly, the value of an input signal and the value of a reference signal are acquired by the program, and the acquired signals are subjected to filtering, error estimating and frequency tracking. In this way, a weight innovation vector is figured out. Meanwhile, whether the weight innovation vector converges or not is determined. If the weight innovation vector does not converge, the output is subjected back to filtering treatment. If the weight innovation vector converges, the algorithm is ended. The above technical scheme of the invention is applied to 60 GHz wireless communication systems.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a fast LMS adaptive beamforming method applied to a 60GHz wireless communication system. Background technique [0002] Smart antennas can effectively improve the utilization of spectrum, which is an effective way to solve the shortage of frequency resources, and can also improve system capacity and communication quality. It was originally widely used in military fields such as radar and sonar, but it has not been popularized in other communication fields due to factors such as price. After years of development, the technology has become more and more mature. In recent years, more and more attention has been paid to the research of applying it to civil mobile communication. [0003] One of the core technologies of smart antennas is adaptive digital beamforming technology. The digital beamforming technology combines the antenna with the digital signal processing technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08
CPCH04B7/086
Inventor 梁海浪贺向阳周建荣
Owner 浙江荣通微电子有限公司