Re: [Discuss-gnuradio] Complex numbers in math operations

[Marcus Müller]

That's not the multiplication "*", that's an operator that takes only one argument (hence, "operand type is", singular). Point being

IdealFMCW[tapIdx] is already a (reference to) a bare gr_complex, NOT a gr_complex* !

Best regards,

Marcus

On 09.06.2017 07:57, Vipin Sharma wrote:

I have a custom block with some input streams being declared as gr_complex type as shown here:

Control_impl::general_work (int noutput_items,

                       gr_vector_int &ninput_items,

                       gr_vector_const_void_star &input_items,

                       gr_vector_void_star &output_items)

    {

      const gr_complex *hTx1 = (const gr_complex *) input_items[0];

      const gr_complex *hTx2 = (const gr_complex *) input_items[1];

      const gr_complex *IdealFMCW = (const gr_complex *) input_items[2];

Later on I use IdealFMCW as follows:

       for(tapIdx=0; tapIdx<TapSize; tapIdx++) {

        *Tx1 = *Tx1 + *(IdealFMCW[tapIdx]) * (*hTx1); 

When I do make, I get compile errors:

error: no match for ‘operator*’ (operand type is ‘const gr_complex {aka const std::complex<float>}’)

         *Tx1 = *Tx1 + *(IdealFMCW[tapIdx]) * (*hTx1); 

I am simply trying to de-reference the pointer (defined by IdealFMCW[tapIdx]) and use the value. What am I not doing right?

Vipin

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