The experience sounds the same as my first attempt, under linux, with
the old osmosdr software, where the magnitude of the signal was
incorrectly assumed to be unsigned.
After fixing this, it all sounded a whole lot better.
Maybe this is also the case in your setup?
Gr. Simon
On 22-09-14 15:08, Mehdi Asgari wrote:
Hi
I am a beginner in SDRs (and DSP)
For the first sample, I'm, trying to build a FM receiver. I've tried
both RTL-SDR and HackRF One (with both GNU Radio and Gqrx)
I can easily get the desired station (on 88.0 MHZ) without noise on
RTL-SDR (using Gqrx or GRC)
But when I use HackRF One (with Gqrx or GRC), I can get the radio, but
it's noisy.
Is is because HackRF's higher sensitivity or does it need more
adjustment to work fine?
Note 1: I am using GNU Radio Live DVD and HackRF One with firmware
2014.08.1 and RTL-SDR (RTL2832)
Note 2:
Link for using RTL-SDR with GRC:
http://www.instructables.com/id/RTL-SDR-FM-radio-receiver-with-GNU-Radio-Companion/?ALLSTEPS
Link for using HackRF with GRC: Mike's lesson 1
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