Title :
An MMIC local oscillator for 16-QAM digital microwave radio systems
Author :
Suwaki, Hideo ; Nakagawa, Tadao ; Ohira, Takashi
Author_Institution :
NTT Radio Commun. Syst. Labs., Yokosuka, Japan
fDate :
6/1/1995 12:00:00 AM
Abstract :
The first MMIC local oscillator for 16-QAM digital microwave systems is presented. The key advance is achieving the very low phase noise required by such systems. Low phase noise is realized with a low phase noise VCO (voltage-controlled oscillator) that is installed into a new PLL (phase-locked loop). Although the developed local oscillator is 90% smaller than the existing Dielectric Resonator-based local oscillators, it achieves comparable receiver performance
Keywords :
MMIC oscillators; digital radio; integrated circuit noise; microwave links; phase locked loops; phase noise; quadrature amplitude modulation; voltage-controlled oscillators; 16-QAM digital microwave radio systems; MMIC LO; MMIC local oscillator; PLL; low phase noise VCO; phase-locked loop; voltage-controlled oscillator; Bit error rate; Dielectrics; Filters; Local oscillators; MMICs; Microwave oscillators; Passband; Phase locked loops; Phase noise; Voltage-controlled oscillators;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
