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Method and system for identifying wireless channel based on hidden Markov model

A hidden Markov and wireless channel technology, applied in transmission systems, transmission monitoring, electrical components, etc., can solve problems such as high algorithm complexity and inability to estimate unknown models, so as to improve transmission stability and optimize wireless signal transmission Effect

Active Publication Date: 2019-03-05
MAIPU COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of these methods is that the algorithm complexity is high, and the known model cannot be used to estimate the unknown model.

Method used

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  • Method and system for identifying wireless channel based on hidden Markov model
  • Method and system for identifying wireless channel based on hidden Markov model
  • Method and system for identifying wireless channel based on hidden Markov model

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Experimental program
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Embodiment

[0096] This embodiment focuses on the process of training the hidden Markov model and using the trained model to identify the wireless channel, such as image 3 As shown, the data sources of the training set used to train the hidden Markov model are wireless channels of multiple known scenarios. First, the test data packets of the wireless channel are preprocessed. The purpose of preprocessing is to reduce noise interference. After preprocessing, the 4-dimensional feature vector is extracted; then, after initializing the HMM model, the extracted 4-dimensional feature vector is used as the input of the HMM model, and the Baum-Welch training algorithm is used to train the HMM model to solve the problem for each known scene. Model parameters.

[0097] The data source of the test set used for unknown channel identification based on the trained hidden Markov model is the wireless channel of the unknown scene to be tested. Similarly, the test data packets of the wireless channel are...

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Abstract

The invention relates to the technical field of the wireless communication, and discloses a method and system for identifying a wireless channel based on a hidden Markov model. A known wireless channel can be effectively and accurately identified so as to improve the stability of the wireless signal transmission. The method for identifying the wireless channel based on the hidden Markov model comprises the following steps: a, extracting 4-dimension feature vectors for expressing different wireless channel features from an actually measured data packet of a known scene; b, taking the extracted4-dimension feature vectors of various scenes as the input of the hidden Markov to train the stale hidden Markov model for the wireless channel of various known scenes, and performing wireless channelclassification; and c, identifying the unknown wireless channel by utilizing the trained hidden Markov model. The method disclosed by the invention is suitable for quickly and accurately identifyingthe wireless channel.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and system for identifying wireless channels based on a hidden Markov model. Background technique [0002] With the rapid development of wireless communication, wireless technology has brought new learning and living experience to people. A wireless system is composed of a signal transmitter, a wireless channel, and a signal receiver. In traditional research, major manufacturers have done a lot of research on signal transmitters and wireless terminals. However, research on wireless signals is still in its infancy. [0003] The signal transmitting end and receiving end of mobile communication are conducted through an electromagnetic path, and this electromagnetic path is closely related to the surrounding physical environment. Under different environments, the wireless channel has some differentiated characteristics due to the multipath effect. It is of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/391H04B17/364H04B17/318
CPCH04B17/318H04B17/364H04B17/391
Inventor 白雁飞
Owner MAIPU COMM TECH CO LTD