Performance Analysis of GMSK and Chirp-Binary Orthogonal Keying in AWGN and Multipath Fading Channels

Gaussian Minimum Shift Keying (GMSK) is a special form of minimum shift keying, which is one of the most prominent modulation techniques, and has long been used in all the standards of Global System for Mobile Communication (GSM) in the world, since its inception. Later, it has been identified that Chirp signals offer inherent protection against fading in multipath channels. In this work, an investigation has been carried out into the performance of Chirp-Binary Orthogonal Keying (C-BOK) scheme in AWGN and multipath fading channels. Its performance has also been compared with the GMSK scheme under the same channel conditions. It has been found that C-BOK scheme offers better performance in both the AWGN and Multipath fading channels compared to the GMSK scheme. Therefore C-BOK may be a good candidate to be used as a modulation technique for wireless and other communication systems with multipath channel environment.