Title :
A digital microwave radio based on 81-QPR modulation
Author_Institution :
Avantek Inc., Fremont, CA, USA
Abstract :
A bandwidth-efficient digital radio, carrying 45 Mb/s in 10 MHz bandwidth, has been developed using 81-state QPR (quadrature partial response) modulation. The receiver threshold at BER 10-6 is about -72 dBm and the unfaded background error rate is typically better than 10-12. This performance, which maintained simplicity of implementation, was possible by exploiting the simple correlation built into the partial response signal. The author outlines the key aspect of the development. The radio is in volume production
Keywords :
digital communication systems; microwave links; modulation; radio equipment; 10 MHz; 45 Mbit/s; 81-QPR modulation; BER; bandwidth-efficient digital radio; digital microwave radio; quadrature partial response; receiver threshold; unfaded background error rate; Bandwidth; Baseband; Bit error rate; Digital communication; Digital modulation; Error analysis; Error correction; Power amplifiers; Radio frequency; Radiofrequency amplifiers;
Conference_Titel :
Communications, 1988. ICC '88. Digital Technology - Spanning the Universe. Conference Record., IEEE International Conference on
Conference_Location :
Philadelphia, PA
DOI :
10.1109/ICC.1988.13612
