Spread Spectrum

Pseudorandom Number Generator (PRNG)

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Animated screenshot of the PRNG output made up out of 5 still screenshots.

The core of any spread spectrum (and other cryptographic) system is a pseudo random number generator (PRNG). Pseudo random numbers play a big role in the world of electronics and cryptology. The quality of a spread spectrum link and its properties strongly depend on this device. For my Direct Sequence Spread Spectrum Experiments I needed … [Read more…]

Direct Sequence Spread Spectrum Experiments

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A pseudorandom number generator (PRNG) using a CMOS 4015 shift register and a 4030 XOR gate.

In our digital communication age heavy cryptology becomes more and more necessary everyday to protect our data from eavesdroppers. Direct Sequence Spread Spectrum is one way of covertly transporting data over radio waves. Without the knowledge of the correct code sequence it is nearly impossible for an attacker to decrypt the original message. 47 CFR … [Read more…]