First implementation of an operating 256 QAM 400 Mb/s microwave radio system

Author

Kawahara, Hiroyuki ; Murase, Takehiro

Author_Institution

NTT Network Syst. Dev. Center, Kanagawa, Japan

fYear

1990

fDate

2-5 Dec 1990

Firstpage

799

Abstract

The design and performance of a 4, 5, 6-GHz, 400-Mb/s microwave radio system are described. The use of a 256-QAM (quadrature amplitude modulation) scheme in the system is discussed. An overall field test has been performed on the system for a 63.5-km overwater route. Results indicate that the outage probability of the 256-QAM system with SD, four-carrier transmission, a transversal equalizer (TRV-EQL), and a cross-polarization interference canceller (XPIC) is within the design objective. Based on these results, a 400-km-long commercial route was constructed and is currently in service

Keywords

amplitude modulation; digital radio systems; diversity reception; fading; microwave links; 256-QAM scheme; 4 GHz; 400 Mbit/s; 400 km; 5 GHz; 6 GHz; 63.5 km; SHF; commercial route; cross-polarization interference canceller; design; digital radio system; fading probabilities; field test; four-carrier transmission; microwave radio system; outage probability; overwater route; performance; space diversity; transversal equalizer; Bit error rate; Degradation; Error correction codes; Frequency; Interference cancellation; Nonlinear distortion; Polarization; Quadrature amplitude modulation; Repeaters; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1990, and Exhibition. 'Communications: Connecting the Future', GLOBECOM '90., IEEE

Conference_Location

San Diego, CA

Print_ISBN

0-87942-632-2

Type

conf

DOI

10.1109/GLOCOM.1990.116617

Filename

116617