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Quadrature amplitude modulation in modulating retroreflector system

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5 Author(s)
Goetz, P.G. ; Naval Res. Lab., Washington, DC, USA ; Funk, E.E. ; Mahon, R. ; Rabinovich, W.S.
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It has been shown that the data throughput of an optical modulating retroreflector (MRR) system can be enhanced by use of spectrally efficient M-ary quadrature amplitude modulation (M-ary QAM). It has been demonstrated that this MRR system has sufficient dynamic range to support up to 64-QAM at 30 Mbit/s in a 6.75 MHz channel bandwidth.

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Electronics Letters  (Volume:39 ,  Issue: 20 )