Abstract
In this work, we show a new method which can directly encode an I (In-phase) and Q (Quadrature-phase) baseband data stream onto a circularly polarized (CP) microwave signal. Here I and Q components are fed directly into a two port CP antenna in order to yield right hand circular polarized (RHCP) or left hand circular polarized (LHCP) waveforms each encoded with zero or 180° phase shift in order to effect QPSK modulation. The CP signal from such an antenna will have deterministic unequal amplitude and phase shifts at different far field spatial locations which if not compensated will degrade the bit-error-rate (BER) performance of the receiver. Simulation and experimental results show the BER performance of the receiver when these two orthogonal CP components have spatially induced phase differences or amplitude imbalances between them. The technique described allows a factor two reduction over the normal QPSK requirement by virtue of the polarization diversity inherent in the scheme.
Original language | English (US) |
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Title of host publication | European Microwave Week 2007 Conference Proceedings, EUMIC 2007 - 10th European Conference on Wireless Technology, ECWT 2007 |
Pages | 62-65 |
Number of pages | 4 |
DOIs | |
State | Published - 2007 |
Externally published | Yes |
Event | European Microwave Week 2007, EuMW 2007 - 10th European Conference on Wireless Technology, ECWT 2007 - Munich, Germany Duration: Oct 8 2007 → Oct 10 2007 |
Other
Other | European Microwave Week 2007, EuMW 2007 - 10th European Conference on Wireless Technology, ECWT 2007 |
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Country | Germany |
City | Munich |
Period | 10/8/07 → 10/10/07 |
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Communication