Bit error rate performance for edge-detected CMI data transmission

Abstract

A simple edge detector for Coded Mark Inversion data transmission is proposed. Its detection performance depends mainly on the false transition probability if the bandwidth of the receiver low-pass filter is reasonably large, say equal to twice the data rate. An approximate expression for the bit error rate (BER) performance of this detector operating in white Gaussian noise is derived by considering the level crossing probability of the noise process. Measurements show that this new approximation is closer to the actual BER performance than results obtained from a previously established theoretical approach in some cases.