A simple four channel receiver for 2- FSK/8-PSK modulated signals is proposed and its performance evaluated. Using Gray-Code mapping and direct detection of individual bits, the overall receiver performance in terms of bit error rate (BER), is evaluated as a function ofEb/N0and a variable phase parameter α, under an assumed additive white Gaussian noise interference model. The variable phase parameter can be adjusted according to the intended application, as three out of four bits that constitute a symbol have individual error rates that depend on the value of α as well asEb/N0. Angle settings for the minimisation of the overall BER can be obtained for different values ofEb/N0. This represents a slight system disadvantage, but it is partly offset by the simplicity with which the receiver is able to deliver deinterleaved data to the intended users, by performing summing and squaring operations on the correlator outputs prior to binary comparisons against zero thresholds. The performance of this scheme can be shown to be superior to equivalent schemes such as 16-PSK and 16-QAM with a small loss in bandwidth efficiency, yet inferior to orthogonal signalling schemes such as 16-FSK, albeit without the corresponding bandwidth utilisation penalties of this latter scheme.