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A simple two-channel receiver for 16-PSK modulated signals is proposed and its performance evaluated. Assuming an additive white Gaussian noise interference model, the receiver is shown to be optimum in a minimum biterror- rate (BER) sense. Using Gray-code mapping and direct detection of individual bits, the overall receiver performance is evaluated as a function of Eb/N0 and variable phase parameters Â¿ and Ã. These variable phase parameters can be adjusted according to the intended application. A set of values for Â¿ and Ã that is independent of Eb/N0 exists for the minimisation of the overall BER. However, in applications where individual data streams are interleaved to produce a (higher rate) composite data stream, the value of Â¿ and Ã that is required to equalise the error rates in the delivered individual data streams, is a function of Eb/N0. Although this represents a slight system disadvantage, it is partly offset by the simplicity with which the receiver is able to deliver deinterleaved data to the intended users.
Communications, Radar and Signal Processing, IEE Proceedings F (Volume:135 , Issue: 5 )
Date of Publication: October 1988