> Hi Marc,
>
> demod:
> both can be implemented in GNU Radio. Correlation of course is more
> computationally intensive; I haven't thought about 4-FSK so far, but I
> guess for quadrature demodulation, you'd need multiple branches to
> distinguish the possible symbols. There are other approaches (e
On Wed, Jun 18, 2014 at 9:14 PM, Nowlan, Sean
wrote:
> If you’d rather use stock GR blocks or you would like a flowgraph with
> identical functionality, you can hook up a Vector to Stream block (with
> num_items=vector_length) to an Integrate block (with
> decimation=vector_length).
>
>
>
> …
>
> Is there any existing 4FSK transceiver system in gnuradio ?
Yes. The OP25 project has an implementation of FSK4 for use in P25, where FSK4
is sometimes known as "C4FM".
Both modulation and demodulation is supported. Here are links to the actual
code (see below) Note that the demod bloc
From: discuss-gnuradio-bounces+sean.nowlan=gtri.gatech@gnu.org
[mailto:discuss-gnuradio-bounces+sean.nowlan=gtri.gatech@gnu.org] On Behalf
Of Activecat
Sent: Wednesday, June 18, 2014 5:59 AM
To: discuss-gnuradio@gnu.org
Cc: sreena p h
Subject: Re: [Discuss-gnuradio] testing block written
Hi Marc,
demod:
both can be implemented in GNU Radio. Correlation of course is more
computationally intensive; I haven't thought about 4-FSK so far, but I
guess for quadrature demodulation, you'd need multiple branches to
distinguish the possible symbols. There are other approaches (e.g. polar
dis
CMake 3.0.0 has lots of bug fixes from the last release (2.8.12), and it also
contains a number of policy changes. The primary ones that effect GNU Radio's
build system are in (1) using a name before it is declared (e.g.,
'gnuradio-runtime', which is used for 'test-gnuradio-pmt' before
'gnurad
Hi, I am new to gnuradio, I want to develop 4FSK system. transmitter and
receiver. Is there any existing 4FSK transceiver system in gnuradio ? Also,
which one of the following two is the best/optimum 4FSK demodulator for low
SNR?
a. Quadrature demodulation
b. Correlator demdulation (autocorrelate
On Wed, Jun 18, 2014 at 4:57 PM, sreena p h wrote:
> Hi
>
> I'm new to GNU radio and is trying to develop my own block. I want to
> develop a block that intake a vector and out put sum of the vector
> elements. I used the out of tree module and followed tutorial using python
> code. How should be
Hi Sreena,
a few quick remarks:
- where does in_arg come from?
- in0 should be seen as a vector of vectors. It's often useful to "print
in0.shape", if in0 is a numpy array
- potential mistake: just returning len(input_items[0]). Be *very* aware
of what the return value of a work call should be (i.
Hi
I'm new to GNU radio and is trying to develop my own block. I want to develop a
block that intake a vector and out put sum of the vector elements. I used the
out of tree module and followed tutorial using python code. How should be the
arguments of blocks.vector_source_f to be given if i am
On 18/06/2014 01:25, Stephen Harrison wrote:
> There is a good treatment of errors in the CORDIC algorithm due to
> finite word length in this paper from IEEE transactions: The
> Quantization Effects of the CORDIC Algorithm (Yu Hen Hu, Senior Member,
> IEEE). I reproduced the results of section IV
I don't speak Verilog but I get the general gist of the code below.
Thanks. Cheers,
Daniele
On 18/06/2014 01:09, Stephen Harrison wrote:
> The Verilog source for the USRP N210 is available online. You can see
> this in ddc_chain.v:
>
> wire [31:0] phase_inc;
>reg [31:0] phase;
> ...
>
>
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