Title :
A single processor packet radio modem for land mobile vehicle tracking applications
Author :
Kremer, Greg ; MacKnight, Jim ; Lao, Ralph ; Goldberg, Steve
Author_Institution :
Trimble Navigation Ltd., Sunnyvale, CA, USA
fDate :
31 Oct-2 Nov 1994
Abstract :
Data communication over VHF/UHF land mobile radio channels presents a difficult, yet well understood set of technical challenges. These challenges include time-varying multipath profiles, Rayleigh fading, and low to moderate signal-to-noise ratio. Modem designs must support additional application based constraints including rapid synchronization, spectrally efficient modulation, a reliable over-the-air protocol, and relatively low cost. The cost constraint, along with an interest for easy support and upgradability, motivated a single DSP processor radio modem design that supports both control and modem applications. An implementation of such a modem is described which meets all of the design criteria
Keywords :
Global Positioning System; Rayleigh channels; data communication; digital signal processing chips; fading; land mobile radio; modems; multipath channels; packet radio networks; signal processing; synchronisation; time-varying channels; tracking; transport protocols; GPS based vehicle tracking; Rayleigh fading; UHF; VHF; control; cost constraint; data communication; design criteria; land mobile vehicle tracking applications; over-the-air protocol; rapid synchronization; signal-to-noise ratio; single DSP processor radio modem; single processor packet radio modem; spectrally efficient modulation; time-varying multipath profiles; Costs; Data communication; Digital signal processing; Land mobile radio; Land vehicles; Modems; Packet radio networks; Protocols; Rayleigh channels; Signal to noise ratio;
Conference_Titel :
Signals, Systems and Computers, 1994. 1994 Conference Record of the Twenty-Eighth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-6405-3
DOI :
10.1109/ACSSC.1994.471580
