Direct quadrature phase shift keying modulator using six-port technology

Zhao, Yanyang; Viereck, C.; Frigon, Jean-François; Bosisio, R.G.; Wu, Ke

doi:10.1049/el:20052466

Cited by 47 publications

(22 citation statements)

References 3 publications

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“…Considering other designs that achieve higher coverage area with full phase, our approach presents a smaller number of diodes resulting in lower power consumption and simpler control of the desired impedance value. These features are well suited for power-sensitive applications [11] and N-port-based circuits [6].…”

Section: Discussionmentioning

confidence: 99%

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New Design of a Variable Impedance Based on Polarized Diodes at Microwave Frequency

Venere

Hurtado

Valle

et al. 2017

IEEE Microw. Wireless Compon. Lett.

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Abstract-In this letter, we present a new variable impedance termination consisting of two polarized diodes. To generate a complex-valued impedance, two controlled current sources polarize the diodes, which are interconnected with a Wilkinson power divider through transmission lines of different electric lengths. Because of the reduced number of diodes, this structure presents low power consumption and simple control. We validated the proposed design by implementing a prototype at the operating frequency of 1575.42 MHz. Mapping the measured results in the Smith chart, the impedance can produce reflection coefficients with full-phase coverage within the circle of magnitude 0.35 over a frequency range of 1.5-1.6 GHz.Index Terms-One-port impedance termination, p-i-n diode, programmable load, variable impedance.

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Section: Discussionmentioning

confidence: 99%

“…V ARIABLE impedances have been widely used in many problems related to communication systems, including electronically controlled attenuators [1] and modulators [2], phase shifters [3], tunable matching networks [4], adaptive radar absorbers [5], and six-port modulators [6].…”

Section: Introductionmentioning

confidence: 99%

New Design of a Variable Impedance Based on Polarized Diodes at Microwave Frequency

Venere

Hurtado

Valle

et al. 2017

IEEE Microw. Wireless Compon. Lett.

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“…The researchers then found that the six-port technique could be used for communication transceivers [2][3][4], direction finding receivers [5] and ranging receivers [6][7][8][9], etc.…”

Section: Introductionmentioning

confidence: 99%

Calibration of a Six-Port Position Sensor via Support Vector Regression

Peng¹,

Yang²,

Yang³

2012

PIER C

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Abstract-In this paper, a calibration technique for the position sensor via support vector regression (SVR) is proposed. The position sensor adopts a zero-intermediate frequency architecture based on a six-port network, which is used for directly measuring the phase differences and indirectly reflecting the position. The SVR, which implements the structural risk minimization (SRM) principle, provides a good generalization ability from size-limited data sets. The results indicate that the SVR model can achieve a great predictive ability in positioning, with an accuracy of 2.41 mm over a distance range of 274.5 mm.

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“…It was later introduced as a direct phase modulator for a single carrier signal [4]. Previous studies showed that a direct transceiver using six-port technology has advantages such as low cost, low power consumption, simplicity and extendibility.…”

Section: Introductionmentioning

confidence: 99%

“…Each component has wideband characteristic. The operating principle of this kind of direct phase modulator has been described in previous work [4]. The essential differences while operating in UWB mode lie in the linear phase response over the wide band and uniform phase modulation at each frequency component.…”

Section: Introductionmentioning

confidence: 99%

RF Front-end for Impulse UWB Communication Systems

Zhao

Frigon

et al. 2006

2006 IEEE MTT-S International Microwave Symposium Digest

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-In this paper, we propose a multi(six)-port radio frequency (RF) front-end including both modulator and demodulator for impulse ultra-wideband (UWB) communication systems. This RF front-end validates full channel (3GHz-4GHz) uniform phase spectrum modulation scheme by using a six-port phase modulator and demodulator. Both the modulator and demodulator adopt the same six-port circuit structure. This kind of quasi-symmetric transceiver front-end is relatively easy to design and fabricate. To validate the proposed RF front-end for UWB communications, a wideband signal with a 1GHz bandwidth is generated from a 2ns pulse and up-converted using a center frequency of 3.5GHz. The 3GHz-4GHz signal is applied to the RF input of a six port modulator and digital data is simultaneously fed to the baseband inputs of the modulator. This operation produces a signal whose phase spectrum is uniformly modulated. Two input ports of the six-port demodulator are fed respectively with the received phase modulated signal and the reference non-modulated signal. The demodulator's four outputs provide different signals used to determine the modulation states with an algorithm based on the six-port circuit features. A proofof-concept experiment has been realized using this multi-port RF front-end and a field programmable gate array (FPGA) based digital signal processing (DSP) platform implementing the demodulation algorithm and synchronization control. Both measurement and simulation results validate the proposed frontend and corresponding algorithms for a 1GHz UWB channel.

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Direct quadrature phase shift keying modulator using six-port technology

Cited by 47 publications

References 3 publications

New Design of a Variable Impedance Based on Polarized Diodes at Microwave Frequency

New Design of a Variable Impedance Based on Polarized Diodes at Microwave Frequency

Calibration of a Six-Port Position Sensor via Support Vector Regression

RF Front-end for Impulse UWB Communication Systems

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