Experimental comparison of B-PPM and NRZ coding formats in a 1550nm trans-atmospheric optical communication link under deep fading conditions

Peach, R.C.; Burdge, Geoffrey L.; Visone, Chris; Wyatt, Jeff; Borbath, Michael R.; Phillips, Ron; Andrews, Larry C.; Wayne, David T.; Kiriazes, John J.

doi:10.1117/12.794688

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Fso 10 Gbps Modem1

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2009

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“…3 In order to acquire lock, the clock and data recovery (CDR) circuitry within the receiver uses a digital phase lock loop (PLL) that requires a certain number of bits with an input signal bit error ratio (BER) above the acquisition of lock (AoL) threshold. 4 This BER threshold is typically 10 -3 to 10 -4 .…”

Section: Fso 10 Gbps Modemmentioning

confidence: 99%

Performance of a FSO augmented RF mesh network

et al. 2009

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Combined RF and optical communication within a heavily scintillated atmosphere requires special modems that can accommodate significant signal fading. A hybrid network (10 Gbps 1550 nm FSO and RF transmission) has been developed and a link quality parameter is used to assist the network routers with the path cost calculation algorithm. Fading statistics, determined by field experiments, are emulated in the laboratory network by a statistically-driven VOA. COTS hardware (FEC and a special amplifier) enable a 35 dB dynamic range. The special modem and its performance within a multi-node network are presented.

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Section: Fso 10 Gbps Modemmentioning

confidence: 99%