Re: [Discuss-gnuradio] Constellation Objects & Messages

[Tom Rondeau]

On Fri, Sep 4, 2015 at 9:46 AM, Tudor Wolff <address@hidden> wrote:

Hi,

I'm using the gr-digital constellation decoder block in GRC
(digital_constellation_decoder_cb) with constellation objects such as
digital.constellation_qpsk(), etc.

I want to modify the block such that it accepts a message and from
that message the block can infer which constellation object to use. This
will all be done in the message handler function. So for example:

std::string message = pmt::symbol_to_string(msg);

if(strcmp(message, "BPSK") == 0)
  d_constellation = constellation_bpsk();
else if(strcmp(message, "QPSK") == 0)
  d_constellation = constellation_qpsk();
...etc

Any ideas on how to set d_constellation as one of these objects?

It is to operate in an OFDM receiver whereby the header of a packet
transmission is decoded and from that, information about the payload
constellation can be acquired. (802.11)

Thanks

It sounds like you know what you are doing. What's the actual problem you're having here?

Tom