In this paper, we applied Continuous Phase Frequency Shift Keying (CPFSK) to Trellis Coded Quantization/Modulation (TCQ/TCM) and thus we called Trellis Coded Quantization/ Continuous Phase Modulation (TCQ/TCCPM) for this new system. In this new scheme we use continuous phase frequency shift keying signal set instead of phase shift keying signal set. As an example, an eight state TCQ/TCCPM syste...

The goal of this paper is to introduce an integrated second order approach in using spread spectrum modulation techniques and the wavelet methodology in modeling low error probability digital image watermarking. The combination of FEC, Modulation Schemes, Multiplexing and Multiple Access techniques constitute the stage of channel coding. The approach adopted here for embedding the watermark is ...

John W. Betz is a Consulting Engineer at The MITRE Corporation. He received a Ph.D. in Electrical and Computer Engineering from Northeastern University. His work involves development and analysis of signal processing for communications, navigation, radar, and other applications. He developed the Binary Offset Carrier modulation for the GPS M code signal. During 1998 and 1999, he led the GPS Mod...

A tremendous technological transformation during the last two decades has provided a potential growth in the area of digital communication and lot of newer applications and technologies are coming up everyday due to these reasons. Restricting overself to the domain of modulation techniques a brief overview over different analog and digital modulation techniques has been provided in this article...

Purpose – The purpose of this paper is to describe an effective method to eliminate or substantially reduce the modulation harmonics due to saturation and inter-modulation for sensorless speed control induction motor drives at low and zero speed with high loads using artificial neural networks (ANN). Design/methodology/approach – In this paper, the separation of the saturation signal, the slott...

John W. Betz is a Consulting Engineer at The MITRE Corporation. He received a Ph.D. in Electrical and Computer Engineering from Northeastern University. His work involves development and analysis of signal processing for communications, navigation, radar, and other applications. He developed the Binary Offset Carrier modulation for the GPS M code signal, and more recently has been contributing ...