[hpsdr] KISS KONSOLE code

[Phil Harman]

Hi Johannes,

Thanks for your question.  From memory that comment applies to the wideband data i.e. the raw 16 bit samples from the ADC.  In which case we only have a real signal which results in a double sided FFT output. I just use the positive frequency output  to display the wideband data.

The comment was that in the future we could produce a complex signal from the real signal and hence display any desired portion of the 0-66MHz wideband spectrum.

The data from the main receiver is 24 bit down converted, decimated and filtered I&Q, all done in the FPGA,  which is processed for demodulation and the sampling rate width bandscope by KK.

73 Phil....VK6PH


From: Johannes Sedlmeier 
Sent: Sunday, July 28, 2013 12:19 AM
To: hpsdr at lists.openhpsdr.org 
Subject: [hpsdr] KISS KONSOLE code

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Hello everyone,


I'm an RF engineer from Germany and I am currently working to fit the KISS KONSOLE program to my needs.


I wondered, if there is a proper downconversion done somewhere in the code. I could not find anything, except a note from the programmer in "EthernetDevice.cs" that says, that 


 //temporary -- soon will do digital down-conversion
 // with sin & cos, so we'll actually have I & Q data to enter.So it seems, that only the Real Part of the received signal is used. Is this correct or am I missing something?
Thanks in advance, I really appreciate your work you have done so far on the HPSDR-Project.
Greetings,Johannes Sedlmeier

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