Frequently Asked Questions
The On-Ramp Wireless Ultra-Link Processing™ technology is purpose-built for wireless machine-to-machine networking systems; particularly for deployment on a metro-scale or in other challenging environments.
Ultra-Link Processing™ is the trademarked name for On-Ramp’s system. The name also refers to the physical layer signal processing implementation.
Random Phase Multiple Access™ (RPMA) is the name of On-Ramp’s multiple access scheme.
The Ultra-Link Processing™ system consists of an Access Point that communicates wirelessly with remote Nodes. Many thousands of Nodes can be configured for each Access Point and a network can be made up of multiple Access Points. Gateway software, located on a central server, coordinates and synchronizes data from all Access Points in the network.
The ULP eNode is a wireless module intended for integration with application vendor platforms, such as electrical meters, vibration sensor, and GPS.
The ULP Access Point is the central data collection point in the On-Ramp network. It has the capability to connect to thousands of remote Nodes. The Access Point also sends data to the Nodes, either directly or via broadcast.
The ULP microNode is On-Ramp’s second-generation wireless Node. With a fully integrated SoC, this module provides the same industry leading wireless performance, but in an even smaller module.
An objective measure of the radios ability to demodulate a signal bounded by power levels; especially important to wireless communications systems in metro and industrial environments. Receive sensitivity is the only way to accurately measure up range and robustness of wireless systems in an apples-to-apples comparison.
In a spread spectrum system, processing gain is the ratio of the spread bandwidth to the un-spread bandwidth.
wiki: http://en.wikipedia.org/wiki/Processing_gain
Link budget is a measure of the total allowable path loss in a radio system. For the ULP system link budget is calculated as follows:
- SNR after de-spread
+ Antenna gain
+ Transmit power
+ Thermal noise floor of the radio
Description of DSSS and its ability to employ processing gain to generate receive sensitivity to allow coverage and immunity to interference. Its proven history in CDMA in creating high performance, robust and high capacity networks.
wiki: http://en.wikipedia.org/wiki/DSSS
Yes, absolutely. Whether the noise is thermal, wide-band interference, or narrow-band interference, processing gain combats these effects identically. DSSS theory and laboratory results using our hardware bear this out definitively.
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