A Linear Decision Feedback Detector For SOQPSK

The pulse amplitude modulation (PAM) decomposition of continuous phase modulation (CPM) signals has been recently revamped to give another view of ternary shaped offset quadrature phase shift keying (SOQPSK) signals as duobinary CPMs. Taking advantage of this approach, we propose a new linear detector that operates using a decision feedback mechanism. We show that the proposed solution offers a very acceptable bit error rate (BER) performance without the need to employ a Viterbi algorithm.