Expérimente en Méditérannée, SeaRake, la nouvelle génération des MobiRake Wi50-Diversity. Ces radio 5.4 GHz de 3 Watts se caractérisent par l'usage d'antennes à diversité d'espace, à diversité de champ et en polarisation double circulaire "RHCP" et "LHCP« , pour un usage NLOS.

Ce concept de radio et d'antennes est destiné à neutraliser les effets de la mobilité, ainsi que les mouvements aléatoires des navires.

System features of Mobile Maritime Data Solution:

Licensed free – 4.9 ~ 6.0 GHz High output power of Radio, up to 3W NO LOS up to 16 KM LOS up to 60 KM LHCP/RHCP sector antenna supporting Rx diversity @ mobile end perfect 2ppm frequency stability for mobility CPE without near-far end problem under PTMP configuration Without packets collision @ CPE end

Coast RHCP Base Station Boats diversity radio antennas Boats diversity radio antennas Mobile Maritime Data Solution – e-rake.fr

System Performance of Mobile Maritime Data Solution version 0.2 watt

LOS up to 16 km NO LOS up to 3 km

Circular polarization

Distance (KM) RSSI Modulation LOS NO LOS 0.1

-42.9

OK OK 0.2

-48.9

OK OK 0.4

-54.9

0.8

-60.9

OK 64 QAM OK OK OK 1.6

-66.9

OK OK 3.2

-73 OK OK 4.8

-76.5

7.2

-80 OK 16 QAM OK 10.8

-83.5

16.2

-87 QPSK ~ BPSK OK OK 24.3

-90.6

Modem OK with ATPC & NLOS attenuation (for modem sensitivity -75 dBm) MobiRake 0.2W Base station with 12 dBi LHCP/RHCP sector antenna and SeaRake 0.2W Mobile with space & polarization diversity antenna 10+3 dBi.

Mobile Maritime Data Solution – e-rake.fr

System Performance of Mobile Maritime Data Solution version 3 watts

Circular polarization

LOS up to 60 km NO LOS up to 16 km Distance (KM) RSSI Modulation LOS NO LOS 0.1

-28.9

0.2

-34.9

OK OK OK OK 0.4

-40.9

OK OK 0.8

-46.9

1.6

-52.9

64 QAM 3/4 OK OK OK OK 3.2

-59 OK OK 4.8

-62.5

7.2

-66 OK OK OK OK 10.8

-69.5

16.2

-73 16 QAM OK OK OK OK 24.3

-76.6

36.5

-80 54.7

-83.6

OK QPSK ~ BPSK OK OK Modem OK with ATPC & NLOS attenuation (for modem sensitivity -75 dBm) MobiRake 3W Base station with 12 dBi LHCP/RHCP sector antenna and SeaRake MMDS 3W Mobile with space & polarization diversity antenna 10+3 dBi.

Mobile Maritime Data Solution – e-rake.fr