Order of Modulation 2018 Dataset

[carlosrivera22]

The classes.txt file in the dataset is in the following order:
classes = ['32PSK',
'16APSK',
'32QAM',
'FM',
'GMSK',
'32APSK',
'OQPSK',
'8ASK',
'BPSK',
'8PSK',
'AM-SSB-SC',
'4ASK',
'16PSK',
'64APSK',
'128QAM',
'128APSK',
'AM-DSB-SC',
'AM-SSB-WC',
'64QAM',
'QPSK',
'256QAM',
'AM-DSB-WC',
'OOK',
'16QAM']

I'm not sure if that is the same order as in the dataset.

Has someone figured this out?

[miweber67]

For what it's worth, I concur that many of the modulation mappings appear to be incorrect, when you take the positions of the Y variable and overlay them on the positions of the classes.txt list. I have not yet figured out what the true mappings are, however.

[pfeatherstone]

Same problem. This is an example QPSK (supposedly) from the dataset with the following plots: spectrum, constellation plot of even samples, constellation plot of odd samples, real-part of IQ samples, imaginary-part of IQ samples.

it makes no sense to me.
This looks like OOK
Also, I think all the signals are oversampled by a factor of 8

[pfeatherstone]

This is what I get for a BPSK

[pfeatherstone]

This is what i get for OOK:

So 'OOK' or label 24 is definitely either PSK16 or PSK32

[skywalkers2012]

what the true mappings?

[skywalkers2012]

@pfeatherstone @carlosrivera22 @carlosrivera22
Has someone figured this out?

[pfeatherstone]

Don't know. I'm not trusting this dataset

[pfeatherstone]

The best thing to do is to buy some SDRs and generate your own dataset

[skywalkers2012]

@pfeatherstone
I got some raw IQ data, use model.predict to predict the model, does the incoming prediction data need to be normalized? "If necessary, how is this normalization achieved?

[skywalkers2012]

Is there any other better way to do signal modulation recognition

[pfeatherstone]

Well this is a problem that goes back decades and using neural networks is gaining interest. But I don’t recommend using this dataset for training unless the correct mapping is known and the data is checked again.

[chgli1999]

In my opinion, the modulation classification list attached to this data set is out of order. According to my exploration, I found that the correct sequence was mentioned in the author's 2018 paper

[pfeatherstone]

@hardware-master Thank you! Good spot. I didn't think to check the order of the list in the paper.

[NairMN]

The best thing to do is to buy some SDRs and generate your own dataset

Could you please give me some ideas on how can I generate own dataset? Actually I was looking for BFSK and 4 MFSK datasets. Which I cant find here as well. Thanks!

[tailororrr]

I also think there is some problem with the labels of this dataset