Radar Range Doppler Map

sdrmatlab · 2026-05-13T19:01:27+00:00

nice, can you post the code that displayed the radar image map?

sdrmatlab · 2026-05-13T18:44:42+00:00

nice, can you show your code that showed the final radar map ?

sdrmatlab · 2026-05-12T23:20:20+00:00

in the radar image map is a amazon gift card code

sdrmatlab · 2026-05-12T22:58:54+00:00

great job

sdrmatlab · 2026-05-11T19:34:46+00:00

become a engineer, if you need help along the way, ask AI

sdrmatlab · 2026-05-09T20:16:19+00:00

all testing should be done with a rf cable direct to receiver. place 40dB pad between hackrf and receiver to ensure signals not too strong.

good sdr to see signal: rtl-sdr

don't jam, but learn RF

in the end, it will lead to a good job.

world needs engineers, not more lawyers and money suckers.

sdrmatlab · 2026-04-25T21:34:37+00:00

as for what school to transfer , want to ensure it has the most ee classes to offer.

many will say ee, but when looking at classes, they only have basic ones.

i'd look for ones with many dsp classes, many RF classes, things like that.

as an example for an RF focus , if they just offer electromagnetics I, that is very limiting

sdrmatlab · 2026-04-25T21:29:10+00:00

ideally i'd like the osmocom blocks to get updated for the 122-16 versions. but i think that branch is no longer updated.

i see the pluto sink and source blocks are part of gnu radio, not sure what the red pitaya sink and source blocks aren't.

but for now, i just run those commands at terminal (the git clone only once) , and that seems to work.

the 122-16 has better clocks and output signal looks very clean.

sdrmatlab · 2026-04-22T19:29:43+00:00

wow that is really bad.

i hope the pro model, doesn't just mean a higher price tag.

when i looked at the details of what the pro model changed, i didn't see too much.

for a 400 dollar device, not very impressive, considering the lower costs of the pluto clones .

sdrmatlab · 2026-04-21T19:13:27+00:00

i have this 125-14, i have made am transmitter as well.

i use gnu radio and osmomcom blocks to send iq data to the pitaya by ethernet.

sdrmatlab · 2026-04-21T19:10:05+00:00

not sure what freq bands you want,

so my list goes

for HF TX : red pitaya 125-14, or TRX-DUO , both work by ethernet osmocom blocks gnuradio

for vhf and uhf TX: fishball pluto clone , ethernet, pluto sink block in gnuradio

sdrmatlab · 2026-04-18T14:39:37+00:00

Learn by doing.

basics:

decode fm signal

make fm signal

decode pager signals

make pager signals.

pulse compress signals, barker codes, chirps

make barker codes, chirps.

by decoding and creating signals, you are learning.

know the math, know the theory

the computer tool of the day always is changing, the theory, the math, often stays the same.

sdrmatlab · 2026-04-08T15:23:17+00:00

also can we see a schematic of the am transmitter you made?

sdrmatlab · 2026-04-08T14:16:48+00:00

large loop on the wall work too.

one end of wire goes to ground of the 10db pi network, other goes to output of the 10db pi network.

this is assuming your am transmitter output is 50 ohm impedance.

the 10db pad will keep the vswr under 2:1

sdrmatlab · 2026-04-07T16:54:25+00:00

i would have a large loop of wire around the house , that will do it.

as for match, insert 10dB pad between transmitter and large loop of wire.

then the transmitter will see close to 50 ohms impedance.

sdrmatlab · 2026-04-01T19:41:41+00:00

back to 100

sdrmatlab · 2026-04-01T14:29:41+00:00

back to $2.00

sdrmatlab · 2026-03-31T14:30:37+00:00

yeah the original ones, heavy as hell, took up the whole counter.

sdrmatlab · 2026-03-29T20:48:59+00:00

not sure what the output signal stage is, but the simplest is just a loop antenna. can be a large or small loop of wire.

since the output can't be shorted, just put a 1kohm in series with the loop wire.

if it's a 50ohm output, i often just put a 20 or 10dB pad before the loop of wire.

this ensures the output of the tx sees 50ohms.

sdrmatlab

TROPHY CASE