TAG: CDMA

Rocky Mountain Tracking Adds CDMA Products and Services

August 7, 2013By

Rocky Mountain Tracking has added new GPS tracking devices that utilize CDMA cellular data networks in addition to its existing GSM-based devices. CDMA coverage has steadily grown within North America during the last decade and is sometimes available in places where GSM networks don’t currently provide coverage. “Adding support for CDMA based devices allows us to offer our customers a... read more

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Sprint Selects Telit as Module Provider, Approves CDMA 1xRTT M2M Module

May 9, 2013By

Telit Wireless Solutions, provider of high-quality machine-to-machine (M2M) modules, services and solutions, has announced approval by Sprint for its CE910-DUAL cellular M2M module. A dual-band CDMA 1xRTT module, the CE910-DUAL allows Sprint M2M Solutions customers to deploy a wide range of M2M applications benefiting from reliable connectivity over Sprint’s nationwide network while enabling cost-sensitive business plans. The CE910-DUAL packs high... read more

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Sprint Selects u-blox for Long-Term CDMA Network Support

May 6, 2013By

Sprint and u-blox have expanded their collaboration in support of Sprint’s commitment to the 2G (1xRTT) CDMA network. As a carrier committed to network choice, Sprint believes M2M customers should be able to choose or combine 2G, 3G and 4G LTE capabilities, depending on their particular requirements, u-blox said. Sprint expects to maintain its 2G network capability for the long... read more

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LiveViewGPS Vehicle Tracker Supports Verizon CDMA Network

October 5, 2012By

LiveViewGPS, a GPS tracking company for business, government and individuals, is now shipping its VLS 300VZ GPS vehicle tracker that operates exclusively on Verizon’s CDMA wireless system. The hard-wired unit features a three-wire hookup and can be configured to update vehicle locations at 1-, 2- and 5-minute intervals. The VLS 300VZ GPS vehicle tracker is based on LiveViewGPS’ VLS platform,... read more

This article is tagged with , , , , , and posted in Transportation

Expert Advice: Quasi-Coherent Delay Lock Loop Tracking and Generalized Binary Coded Symbols in Multipath

May 1, 2010By

The original GPS signals, and indeed most GPS signals including L5, utilize conventional pseudonoise (PN) signal code division multiple access (CDMA), some with both in-phase and quadrature-phase modulation. In the late 1990s, I generalized Manchester PN symbol-spreading by defining split-spectrum binary square wave symbol-spreading, in a series of limited-distribution papers for the Air Force GPS Independent Review Team (IRT). These split-spectrum signals have been developed and analyzed much more fully by many others, and they are now termed binary offset carrier (BOC) modulation. The BOC codes can provide a noise-error advantage by placing more of their spectral energy at an offset frequency, thereby increasing the Gabor bandwidth. They can also provide spectral separation from other GNSS signals in the same frequency band, for example, L1. read more

This article is tagged with , , and posted in From the Magazine, Opinions