Title :
RF-related impairments for microwave digital radios
Author_Institution :
Microwave Commun. Div., HARRIS Corp., Morrisville, NC, USA
Abstract :
A single low-cost universal SDH/PDH common radio platform is developed to cover the frequency range from 6GHz up to 40GHz. The radio is designed for independent of modulation, capacity and bandwidth. The single radio platform supports modulation from QPSK up to 256QAM, capacity from 2E1/T1 up to OC3/STM1, and bandwidth from 1.75MHz up to 56MHz. This paper concentrates on design consideration for general RF related impairments versus various QAM modulations, including co-channel interference degradation, non-linearity degradation, transmitter noise leakage degradation, RF return loss degradation and overall phase noise degradation, etc.
Keywords :
cellular radio; cochannel interference; digital radio; quadrature amplitude modulation; radio links; 1.75 to 56 MHz; 6 to 40 GHz; QAM modulations; QPSK; RF return loss degradation; RF-related impairments; cellular backhaul network; co-channel interference; microwave digital radios; nonlinearity degradation; overall phase noise degradation; point-to-point radios; transmitter noise leakage degradation; universal SDH/PDH common radio platform; Bandwidth; Degradation; Digital communication; Interchannel interference; Phase modulation; Phase noise; Quadrature amplitude modulation; Quadrature phase shift keying; Radio frequency; Synchronous digital hierarchy;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1610189
