How to Measure the Time Difference of Arrival(TDOA) between two receivers

i am trying to perform a localization using TDOA arrival between multiple sensors.TDOA values can be measure using correlation between same signal received at two sensors placed at two different positions.Here i need to model the incoming radar rectangular pulse waveform which is transmitted at certian carrier frequency .can anyone guide me through

1)How to generate a rectangular radar pulse waveaform transmitted at certain fc??

2) How to perform the correlation of the signals are received at two different receivers ??

Answer 1

[Govind KM]

@Ijjada Hari,

Rectangular pulse waveforms can be generated using a “phased.RectangularWaveform” object. Here is sample code for the same:

waveform = phased.RectangularWaveform('SampleRate',1e6,'PulseWidth',50e-6,'PRF',10e3);
plot(waveform)

More details on the "phased.RectangularWaveform" object can be found in the documentation below:

https://www.mathworks.com/help/phased/ug/rectangular-pulse-waveforms.html#bs7a0rs-1

Signal correlation can be performed using functions in the Signal Processing Toolbox. A list of these functions can be found in the documentation below:

https://www.mathworks.com/help/signal/correlation-and-convolution.html#:~:text=expand%20all-,Correlation,-Convolution

Hope this helps!

Answer 2

[Sian Jin]

Hi @Ijjada Hari,

You can try to use phased.TDOAEstimator to correlate signals at two receivers. There is one MATLAB example you can look at: https://www.mathworks.com/help/phased/ug/target-localization-in-active-and-passive-radar.html. In this example, FMCW waveform is used via calling phased.FMCWWaveform. You can replace phased.FMCWWaveform to phased.RectangularWaveform in your simulation.

Hope this helps.

Thanks,

Sian