Spread-spectrum sequences from unstable periodic orbits

I find that it is possible to use the unstable periodic orbits (UPO's) from a chaotic system to approximate a chaotic signal from that system. The UPO's are used to create possible sequences of motion for the chaotic system, and these possible sequences are then compared to a noise-contaminated chaotic signal to determine which possible sequence is the best estimate for the noise-free signal. The comparison process has some similarity to CDMA.