Coherent Technologies – Taking DWDM into the Terabit Age
by Geoff Bennett
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LightSquared and Inmarsat Amend Agreement
LightSquared and Inmarsat announced an amended cooperation agreement providing LightSquared additional time and flexibility to use its spectrum to deploy a terrestrial 4G wireless network once all regulatory authorizations have been secured.
“This new agreement allows LightSquared an opportunity to focus its efforts on obtaining the necessary regulatory approvals to begin building the nation’s first, coast-to-coast wireless broadband system,” said Doug Smith, LightSquared’s interim chief operating officer and chief network officer. “We remain committed to fulfilling our business vision to bring world-class wireless broadband connectivity to millions of Americans.... > More
Broadcom Intros 40nm Multi-Constellation GNSS Solution
Broadcom introduced a new location architecture for smartphones that promises 10x acquisition performance improvement and faster and more accurate position computation than existing smartphone GPS solutions.
Broadcom's location architecture features a new 40nm CMOS Global Navigation Satellite System (GNSS) chip that significantly reduces time-to-first-fix (TTFF) for outdoor positioning and also uses data from inertial sensors, Wi-Fi access points (including those based on recently announced 5G WiFi) and future technologies such as Bluetooth beacons to enable indoor positioning. In addition, the platform offers integration with NFC, which opens the door for smarter, more secure mobile payments where location data provides additional security.
The Broadcom BCM4752 GNSS chip simultaneously collects data from four satellite constellations (GPS, GLONASS, QZSS and SBAS) and uses the best received signals to calculate location. It uses 50 percent less power than previous generations and 44% less board space.
Navy's MUOS Satellite Successfully Launched
The first Mobile User Objective System (MUOS) satellite, which will provide simultaneous voice, video and data communications to U.S. military combatants, was successfully launched into orbit from Cape Canaveral Air Force Station, Fla., aboard a United Launch Alliance Atlas V rocket.The first satellite in the MUOS constellation was built by Lockheed Martin. MUOS satellites feature a wideband code division multiple access payload that incorporates advanced technology to provide a 16-fold increase in transmission throughput over the current UFO satellite system. A single MUOS satellite will provide four times the capacity of the entire legacy UFO constellation of 10 satellites. The satellites also include a hosted legacy UHF payload that will be fully compatible with the current UFO system and legacy terminals.
Lockheed Martin Space Systems, which is the MUOS prime contractor and system integrator, said the first MUOS satellite and associated ground system will provide initial on-orbit capability this year with the four-satellite global constellation achieving full operational capability in 2015, extending UHF narrowband communications availability well past 2025.
"MUOS is a revolutionary new satellite system that will provide unprecedented new communications capabilities for the armed forces," said Kevin Bilger, Lockheed Martin vice president and general manager of Global Communications Systems. "We look forward to executing a smooth and efficient on-orbit checkout, paving the way for operational use."
LightSquared Fires Back at FCC, Claims $4 billion Spent
Following the NTIA's finding that there is "no practical solution" to the GPS interference issue with LightSquared's proposed network, and the FCC's subsequent decision to rescind its conditional approval of the network, LightSquared fired back. In a press statement, Sanjiv Ahuja, Chairman and CEO of LightSquared states:
"After years of receiving regulatory approvals, the FCC approved LightSquared to build its ground network in 2005. In 2010, the FCC amended that plan, requiring LightSquared to build a national broadband network that reached 260 million Americans. At the government's mandate, LightSquared began investing billions of dollars in America's infrastructure – without asking for any money from the American taxpayer. Yesterday, after LightSquared had already spent nearly $4 billion, the FCC changed its mind. There can be no more devastating blow to private industry and confidence in the consistency of the FCC's decision-making process."
NTIA Concludes LightSquared Network Incompatible with GPS
The National Telecommunications and Information Administration (NTIA) submitted its final conclusion to the FCC: LightSquared's proposed mobile broadband network will impact existing GPS services and "there is no practical way to mitigate the potential interference at this time." The NTIA states that while future technologies may mitigate the interference, current federal, commercial and private users of GPS will not be able to replace their systems in the timeframe called for by the proposed LightSquared network or at a practical cost.
The NTIA letter and test results are posted online.
In a press release, LightSquared said it continues to believe that the latest testing was biased and that it remains committed to finding a resolution with the federal government and the GPS industry.
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Coherent Technologies – Taking DWDM into the Terabit Age
by Geoff Bennett
Staying Ahead of the Curve for Network Data Inspection
by Dr. Hongwen Zhang
Tailoring 100G for Metro Networks
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