A digitally controlled constant envelope phase-shift modulator for low-power broad-band wireless applications
- 10 January 2006
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 54 (1) , 96-105
- https://doi.org/10.1109/tmtt.2005.861669
Abstract
A low-power constant envelope phase-shift modulator is presented. The circuit switches the phase of a constant amplitude carrier at output according to the input digital data. Design issues and their impact on the performance of the modulator are discussed. A test chip was fabricated in a 0.18-mum CMOS process. Experiment results verified the design principle of the modulator. The modulator consumes 2 mA and is suitable for low-power wireless applications like sensor network and personal area network. Since the circuit is implemented mostly by digital circuit, has broad-band frequency response, and supports high data rate, the modulator can be used at various wireless bands. The measured operating range of carrier frequency is 1.75 to 3.5 GHz, and the modulation data rate can go up to 500 Mb/s. In addition, the modulator can be modified to generate different modulations by digitally controlling both the phase and amplitude of the output signal from a phasor-combining circuit. Therefore, the modulator can potentially be used for software configurable radiosKeywords
This publication has 19 references indexed in Scilit:
- A 2.5 GHz constant envelope phase shift modulator for low-power wireless applicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Design and analysis of a low-power constant envelope phase shift modulatorPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- A programmable baseband processor design for software defined radiosPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2004
- Dynamics of high-frequency CMOS dividersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Design of SAW FIR filters for quadrature binary modulatorsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Low-cost millimeter-wave transmitter using software radio techniquesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- A 1.75-GHz highly integrated narrow-band CMOS transmitter with harmonic-rejection mixersIEEE Journal of Solid-State Circuits, 2001
- A 900-MHz/1.8-GHz CMOS transmitter for dual-band applicationsIEEE Journal of Solid-State Circuits, 1999
- A 200-MHz CMOS phase-locked loop with dual phase detectorsIEEE Journal of Solid-State Circuits, 1989
- Minimum shift keying: A spectrally efficient modulationIEEE Communications Magazine, 1979