Digital modulation Techniques

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Anonymous
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  Can we use  Cy kits to simulate Digital modulation techniques?

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ETRO_SSN583
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Level 9
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The answer is yes, depending on what mod technique you are trying to effect and

   

communication mode of interest. AM, FM, PSK, Tone Methods (like CTSS, FSK),

   

digitakl modes..... http://en.wikipedia.org/wiki/Amateur_radio#Modes_of_communication

   

 

   

AM is straightforward using a multiplying DAC (PSOC 1) or SW and a DAC

   

for PSOC 3 / 5. Or this approach http://www.psocdeveloper.com/forums/viewtopic.php?f=42&t=6868

   

There also is a mixer in PSOC 3 / 5 to do modulation.

   

 

   

And using a table and DMA to DAC one could real time modifiy table contents to modulate

   

a signal.

   

 

   

 

   

Regards, Dana.

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ETRO_SSN583
Level 9
Level 9
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Note PSOC 1 does not have DMA, only 3 / 5.

   

 

   

Regards, Dana.

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ETRO_SSN583
Level 9
Level 9
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One last comment, a summary of approaches to modulate signals -

   

 

   

1) Via total analog techniques, for example using PSOC 3 / 5 OpAmps for

   

oscillator signal generation and for modulation of signal generated. Or

   

Mixer http://www.cypress.com/?rID=44407

   

 

   

Or swcap in PSOC 1     http://www.psocdeveloper.com/uploads/tx_piapappnote/an2044.pdf

   

 

   

2) Partial analog and digital techniques, DACs, Counters, PWM to gen signals,

   

and DMA, software polling to effect modulation.

   

 

   

3) Verilog and/or UDBs to build a custom modulation engine, like a DDS approach.

   

PSOC 3 /5.

   

 

   

http://www.cypress.com/?rID=39408

   

 

   

Regards, Dana.

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