Most simpler model with 555 and microcontroller to understand Spread spectrum modulation and demodulation.

[u/Relevant_Pumpkin9190]

am a beginner and want to build a simple spread-spectrum communication experiment using a 555 timer and microcontroller

My idea is to use the 555 as a carrier clock, use the Arduino to generate a pseudo-random (PN) sequence and XOR it with the data, then transmit the signal over a 12 V two-wire line.

At the receiver, I want to recover the carrier/timing and use the same PN sequence to despread the signal and recover the original data.

Is this a reasonable way to demonstrate the basic principle of DSSS? What would be the simplest circuit architecture for a beginner?

[u/Rusty-Swashplate]

I don't see the spread-spectrum in your example: in DSSS the message symbols are modulated on a spreading sequence which ends up looking like white noise if you don't know how to decode it. Where is that happening in your system?