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Identifying the ADS-B signal received using RTL-SDR dongle.

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Prithiviraj Bhundoo
Prithiviraj Bhundoo on 24 Jul 2021
Hi, I am trying to develop an algorithm to identify ADS-B signal recived by the RTL-SDR. So far I collected the IQSamples using the following command:
RX = comm.SDRRTLReceiver('0','CenterFrequency',1090e6,...
'EnableTunerAGC',false,'TunerGain',60,'SampleRate',2.4e6,...
'OutputDataType','single','SamplesPerFrame',262144,...
'FrequencyCorrection',0)
I plotted the IQSamples and this is my result:
My next step is to set a threshold crossing for the noise floor. However, I am not sure how to implement the threshold. Can someone guide me to code the threshold?
Thank you.

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