منابع مشابه
Channelized digital receivers for impulse radio
Critical to the design of a digital impulse radio (IR) receiver is the ability of the analog-to-digital converter (ADC) to efficiently sample and digitize the received signal at the signal Nyquist rate of several gigahertz. Since designing a single ADC to operate at such frequencies is not practical, channelized receivers that efficiently sample at a fraction of the signal Nyquist rate are pres...
متن کاملAn Analog Correlator for Ultra-Wideband Receivers
We present a new analog circuit exhibiting high bandwidth and low distortion, specially designed for signal correlation in an ultrawideband receiver front end. The ultra-wideband short impulse signals are correlated with a local pulse template by the correlator. A comparator then samples the output for signal detection. A typical Gilbert mixer core is adopted formultiplication of broadband sign...
متن کاملDevelopment of THz Quantum Cascade Laser as a Local Oscillator for Heterodyne Receivers
We are developing THz-QCL (quantum cascade laser) as a local oscillator for heterodyne receivers. THz-QCLs are made of GaAs/Al0.15Ga0.85As using resonant LO phonon scattering depopulation scheme, and processed in a metal-metal waveguide using gold-gold thermo compression wafer bonding technique. CW mode operation of the THz-QCL has been achieved up to a heat-sink temperature of 74 K at the lasi...
متن کاملCoarse acquisition for ultra wideband digital receivers
Ultra wideband (UWB) radio is a new wireless technology that uses sub-nanosecond pulses to transmit information, resulting in a bandwidth greater than 1 GHz. The problem of synchronizing a receiver with the incoming signal grows in complexity as the signal bandwidth increases. This paper addresses coarse synchronization in UWB receivers. It analyzes how the design of the correlation process aff...
متن کاملFREQUENCY AGILE Tm,Ho:YLF LOCAL OSCILLATOR FOR A SCANNING DOPPLER WIND LIDAR IN EARTH ORBIT
A compact cw Tm,Ho:YLF laser with single-mode tunability over +/4 GHz has been developed into a modular unit containing an isolator and photomixer for offset tuning of the LO from a master oscillator which controls the frequency of a Doppler lidar transmitter. This and an alternative diode laser LO will be described,
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ژورنال
عنوان ژورنال: International Conference on Aerospace Sciences and Aviation Technology
سال: 2007
ISSN: 2636-364X
DOI: 10.21608/asat.2007.24005