Pulse~Link invited us to meet with them a few weeks ago in Boston, where they were sponsoring and exhibiting at an ITU Ultra Wideband task group meeting. We spent several hours with John Santhoff (founder and CTO), Bruce Watkins (President and COO) and Tom Kovanic (VP of Marketing).
We have written previously about ultra wideband (UWB) and Pulse~Link - see What's Next for Wireless Networking (http://www.broadbandhomecentral.com/report/backissues/Report0311_6.html). Founded four years ago, they have announced many applications for high-speed UWB: over hybrid fiber/coax (HFC) networks; over home power lines; and wireless in the home.
In Boston, Tom showed us all of these in operation using early versions of their technology.
Pulse~Link has developed an integrated circuit it calls a "media-diverse UWB Software Defined Cognitive Radio (SDCR) solution." They say it will support all three media types--cable, power line and wireless--simultaneously on the same chipset, and project very impressive "target data rates":
Like other UWB approaches, all of these share the spectrum without interfering with existing services--video over cable, Wi-Fi networks in the home--carried over the same system.
John explained the technical approach Pulse~Link uses to achieve these speeds: the data is coded by the different times between very narrow pulses -- they call this a "pulse recurrent frequency" approach. Other "flavors" of UWB use different means to encode data.
With many different approaches to UWB, the IEEE 802.15.3a Task Group for high-rate wireless personal area networks has so far been unable to agree on a single approach. To break the impasse, John is leading a drive to adopt a "common signalling mode" (CSM) to provide an "etiquette" for UWB devices based on different approaches to coexist, coordinate their actions and interoperate in the same wireless network.