Zero-Crossing Based Demodulation of Minimum Shift Keying

Authors : Mine KALKAN

Pages : 75-94

View : 14 | Download : 12

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Minimum shift keying insert ignore into journalissuearticles values(MSK); modulation has features such as constant envelope, compact spectrum and good error performance, which are all desirable in many digital applications including mobile radio. Numerous receiver structures to demodulate MSK have been suggested, such as correlation receivers, differential detectors and frequency discriminators. MSK is a form of biphase keying and can be detected by a zero-crossing based phase demodulator which gives near optimum performance. In this paper, the bit error performance of a zero-crossing based coherent MSK demodulator is theoretically investigated and a closed-form expression for the bit error rate is derived. The results indicate that the demodulator performs within 0.8-1 dB of the theoratical optimum for MSK. Towards the goal of deriving probability of bit error, it is also shown that under additive white Gaussian noise insert ignore into journalissuearticles values(AWGN); zero-crossing locations of MSK signals are Gaussian distributed except at very low signal-to-noise ratios.
Keywords : Minimum shift keying modulation, receiver performance, zero crossing properties, non parametric testing