Title :
Development of a commercial, 38 GHz, communication
Author :
Gulloch, W. ; Politi, R. ; Nobili, M. ; Amati, M. ; Colombo, G.
Author_Institution :
Alcatel Telettra, Vimercate, Italy
Abstract :
Work carried out in the development of commercial radio links at millimeter (MM) wave frequencies is presented. System aspects are discussed, and results are presented for the MM-wave components which have been developed. A modular common system approach has been used, thus enabling the economical reuse of most of the lower-frequency system functions. The modulation options which have been considered and their effect on the MM-wave components are discussed. From this analysis a low-cost system approach is presented based on the use of MMICs (monolithic microwave integrated circuits) and broadband RF components. Offset 4 QAM (quadrature amplitude modulation) was used in order to provide a good compromise between amplifier linearity and spectral efficiency. This system design has been implemented at 38 GHz, and various system results are presented.<>
Keywords :
amplitude modulation; digital radio systems; microwave links; 38 GHz; BER; MM-wave components; MMICs; broadband RF components; commercial link; commercial radio links; low-cost system; millimetre-wave link EHF; modular common system; monolithic microwave integrated circuits; offset 4 QAM; quadrature amplitude modulation; Broadband amplifiers; Linearity; MMICs; Microwave integrated circuits; Monolithic integrated circuits; Quadrature amplitude modulation; Radio frequency; Radio link; Radiofrequency amplifiers; Radiofrequency integrated circuits;
Conference_Titel :
Microwave Symposium Digest, 1993., IEEE MTT-S International
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-1209-0
DOI :
10.1109/MWSYM.1993.276999
