Title :
Broad band software-defined radio receivers based on superconductive devices
Author :
Fujimaki, Akira ; Nakazono, Koichi ; Hasegawa, Hiroaki ; Sato, Takashi ; Akahori, Akira ; Takeuchi, Nobuo ; Furuta, Futoshi ; Katayama, Masaaki ; Hayakawa, Hisao
Author_Institution :
Dept. of Quantum Eng., Nagoya Univ., Japan
fDate :
3/1/2001 12:00:00 AM
Abstract :
We have studied software-defined radios (SDRs) based on superconducting devices. The increasing data rate in mobile communications will require a band-width of up to a few hundred MHz in the future. We have confirmed numerically the broad-band characteristic of oversampled analog-to-digital converters including a lowpass and bandpass modulator. Furthermore, the bandpass modulator constructed without a resistor is found to have sensitivity improved by two orders of magnitude compared to that of the lowpass modulator. This result means that the digital RF radio architecture based on a bandpass ADC is better suited for a future SDR receiver
Keywords :
analogue-digital conversion; band-pass filters; low-pass filters; mobile radio; modulators; radio receivers; superconducting filters; superconducting microwave devices; bandpass ADC; bandpass modulator; broad band software-defined radio receivers; digital RF radio architecture; lowpass modulator; mobile communications; oversampled analog-digital converters; superconductive devices; Analog-digital conversion; Cellular phones; Costs; Mobile communication; Multiaccess communication; Radio spectrum management; Receivers; Superconducting devices; Superconductivity; Telephone sets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
