Analog signal identification method based on complex neural network and attention mechanism

An analog signal and neural network technology, applied in the field of analog signal recognition, can solve the problem that the meta-learning method has not been studied, and achieve the effect of excellent innovation and good classification effect.

Inactive Publication Date: 2021-10-26
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Meta-learning methods equipped with attention mec

Method used

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  • Analog signal identification method based on complex neural network and attention mechanism
  • Analog signal identification method based on complex neural network and attention mechanism
  • Analog signal identification method based on complex neural network and attention mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Embodiment 1 experiment and verification

[0112] In order to make the purpose and effect of the present invention clearer, take the signal prediction experiment of the meta-learning model CAMEL based on the complex neural network and the attention mechanism of the present invention as an example, and use the analog signal data set RADIOML 2016.04C to analyze the integrated model of the present invention Describe in detail.

[0113] S1.1: The dimension of the original input data is 2×128, and its classification labels are 11 modulation modes: 8PSK, AM-DSB, AM-SSB, BPSK, CPFSK, GFSK, PAM4, QAM16, QAM64, QPSK, WBFM. The input signal signal-to-noise ratio SNR ranges from -20dB to 20dB, and this experiment only selects signal samples with SNR≥0;

[0114] S1.2: Divide the data set into P (Prediction) set and O (Other) set, select 5 types of samples to form P set, and the other 6 types of samples to form O set. Select 95% of the samples in the P set to form the test set, an...

Embodiment 2

[0139] Example 2 actual scene

[0140] Use the network model after the optimized parameters trained in the last step of Example 1 above, and perform iterative training to continuously optimize the CAMEL network model at the same time, use the test data set to test its final performance, and apply it in the actual prediction work.

[0141] For example, at the base station, the modem (Modem) module of equipment such as mobile phones is used to collect IQ signals (for analog signal data, divided into training sets and test sets), with reference to embodiment 1 step S1.1, the dimension of the original input data is 2 × 128, so that the data dimension is 2×128, wherein the first dimension is 2, representing the real part and the imaginary part of the complex data. Screen the signal data with a suitable signal-to-noise ratio (SNR), the signal data with SNR greater than or equal to 0, and prepare for input prediction.

[0142] Divide the data into training set and test set, input th...

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Abstract

The invention discloses an analog signal identification method based on a complex neural network and an attention mechanism. The identification method is characterized by comprising a model design method based on the complex neural network and the attention mechanism, and a complex meta-learning training method thereof. According to the method, the complex neural network and a multi-head attention mechanism are applied to a meta-learning model, so that the model can better capture category features of training samples, and a better categorization effect and stable performance are achieved; meanwhile, the model can be applied to most signal categorization tasks, and a better test result can be obtained with a small number of training samples.

Description

technical field [0001] The invention relates to the field of analog signal recognition. Background technique [0002] The success of signal recognition in the field of deep learning requires the use of large amounts of data. And deep learning models trained with traditional supervised learning methods tend to perform poorly when they have only small amounts of data or when they need to adapt to unseen tasks or time-varying tasks. In practical signal recognition tasks, collecting and annotating rich data is expensive, especially for some rare but important signals. On the other hand, due to the presence of noise, deep neural networks must adapt to real-time changes in SNR in practical scenarios. [0003] In actual signal recognition tasks, analog signals include current, voltage, and power. [0004] Meta-learning methods equipped with attention mechanisms in complex neural networks have not been investigated. Contents of the invention [0005] The principle of this appl...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/62G06N3/04G06N3/08
CPCG06N3/084G06N3/045G06F2218/00G06F2218/12G06F18/214
Inventor 史清江彭颖董益宏
Owner TONGJI UNIV
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