Multi-level digital modulation performed directly at carrier frequency
- 1 October 1995
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 2, 673-676
- https://doi.org/10.1109/euma.1995.337044
Abstract
Direct modulation of the carrier signal has been shown to be an attractive means of reducing the complexity of the RF hardware required in a communications transceiver. To this end, a proof-of concept X-band vector modulator, realised using monolithic phase shifters and attenuators, has been used to demonstrate that multi-level digital modulation can be implemented at high data rates and without requiring significant control power. The measured constellations for QPSK, 32-PSK and 16 QAM modulation are presented. This technique is suitable for both microwave and millimetre wave appicatons.Keywords
This publication has 7 references indexed in Scilit:
- Enhanced Modelling of Interdigitated Planar Schottky Varactor DiodesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Accurate millimeter-wave large signal modeling of planar Schottky varactor diodesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Accurate modelling of cold-MESFETs for adaptive MMIC signal processing applicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1995
- Analog reflection topology building blocks for adaptive microwave signal processing applicationsIEEE Transactions on Microwave Theory and Techniques, 1995
- Measurement techniques for monolithic microwave integrated circuitsElectronics & Communication Engineering Journal, 1994
- 24 GHz serrodyne frequency translator using a 360/spl deg/ analog CPW MMIC phase shifterIEEE Microwave and Guided Wave Letters, 1994
- Ku-band serrodyne frequency translator using wideband MMIC analogue phase shiftersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1993