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

Volume

2

fYear

1994

fDate

31 Oct-2 Nov 1994

Firstpage

842

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 1994. 1994 Conference Record of the Twenty-Eighth Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

0-8186-6405-3

Type

conf

DOI

10.1109/ACSSC.1994.471580

Filename

471580