Chirp Signal on Pluto for FMCW Radar

fieldMouse

on Jun 12, 2024

Category: Hardware

Product Number: ADALM PLUTO

Hello, I'm working to build FMCW radar by using Pluto and Python. I've tried to run chirp signal in cycling, but with my code it send only small message (small pack) and stop sending. I'm think problem with buffer, but how to fix my problem I don't know. May anybody help me?

import numpy as np
import adi
import time

sample_rate = 10e6
freq_center = 2.5e9
duration = 1
bandwidth = 2e6

t = np.linspace(0, duration, int(sample_rate * duration), endpoint=False)
chirp_signal = np.exp(1j * 2 * np.pi * (freq_center * t + 0.5 * bandwidth * t**2 / duration))

sdr = adi.Pluto("ip:192.168.2.1")
sdr.tx_rf_bandwidth = int(bandwidth)
sdr.tx_lo = int(freq_center)
sdr.tx_cyclic_buffer = True
sdr.tx_hardwaregain = -10
sdr.sample_rate = int(sample_rate)

sdr.tx(chirp_signal)

try:
while True:
time.sleep(1)
except KeyboardInterrupt:
print("killed by user")

sdr.tx_destroy_buffer()
sdr.tx_enabled_channels = [0]

Tags: hardware sdr.tx() software defined radio pluto chirp adalm pluto Show More

0 Rajpatil
on Jul 23, 2024 12:32 AM
Hello,
I think you should move sdr.tx_enabled_channels = [0] above in the code where you setup the radio, also you can initialize the buffer to the size of your signal.

Regards,
Raj
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Chirp Signal on Pluto for FMCW Radar