¿ªÔÆÌåÓý

  1. BITX20
  2. Messages
Single Messages Topics Expanded Polls

Re: DSP cheap for qrp

 

Giuseppe

Thank you for sharing wonderful project.
I did not even try because stm32f103 does not have fpu and dac.?
(Compilation is the same, but FIR and IIR are implemented internally as software)
But you overcame it nicely.?Perhaps using PWM and a capacitor, it seems to have a DAC effect.
If you make it possible to pass by physical switch, uBITX can be applied very easily.
If you need a filter simulation using Matlab, please email me. I will help you.

Ian KD8CEC


2018-04-25 19:48 GMT+09:00 Giuseppe Callipo via Groups.Io <ik8yfw@...>:

Hi, I shared a project of an economic and simple dsp, it is based on the processor arm cortex stm32f103 whose module is at a cost less than two dollars in online shop. I implemented two narrow cw filters of about 300 and 700 hz and two ssb filters with a width of less than 2200 hz and less than 3300 hz plus a 6-level noise reduction algorithm. The project is very cheap solution and is suitable to embed in every qrp project. The? project is now on github is still experimental but it is not bad. The project is here:?



Some test here:





Best 73 de IK8YFW GIUSEPPE.

?



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
(my blog)
Join [email protected] to automatically receive all group messages.