Correlative encoded frequency shift keying (CEFSK) modulation technique

A new power and bandwidth efficient modem technique-Correlative Encoded FSK (CEFSK) is proposed. CEFSK has a spectral efficiency comparable to Gaussian filtered FSK (GFSK), and it achieves 0.7dB Ε
b
/N
0
improvement at bit error rate (BER) of 1 × 10
⁻⁴
over GFSK in an additive white Gaussian noise (AWGN) channel and 3.0dB improvement in a Rayleigh fading channel