This paper is dedicated to modeling of the digital method of single-sideband (SSB) modulation. Digital method of SSB modulation provided in this paper is based on Weaver`s method of SSB modulation. The design and calculations of digital blocks are detailed. Such a model allows obtaining the output SSB signal in time and frequency domains at given input signals and system parameters. This could be useful for design and optimization purposes.
In the case of implementation of SSB modulation with the use of analog circuits, it requires mixers, filters constructed with the use of inductors, capacitors, ceramic filters, resonators etc. In the case of the digital implementation of SSB modulation, considered in this paper, no analog filters or multipliers are required. Any filtering and multiplication is performed in digital form. Only analog to digital (ADC) and digital to analog (DAC) converters are required here. The ADC is required for digitizing of input analog signal that is usually in human voice frequency range. The high-speed DAC is used for backward converting of a digital sequence to the analog form of final SSB signal. Such approach allows performing all transformations without any other analog circuits and does not require adjustment in the case of mass-production.
- D. Weaver, “A third method of generation and detection of single sideband signals”, Proceedings in the IRE, pp. 1703-1705, 1956.
DOI: 10.1109/JRPROC.1956.275061 - J. Honey and D. Weaver, “An Introduction to Single-Sideband Communications”, Proceedings in the IRE, ol 44, p.1667-1675, 1956.
DOI: 10.1109/JRPROC.1956.275032 - T. Schilcher, “RF Applications in digital signal processing”,CERN Accelerator School: Specialized Course on Digital Signal Processing, p.249-283,
- Fundamentals of Single-sideband Communication, Washington, D.C., USA: Dept. of the Army, Dept. of the Air Force, 1961.