Title :
The 220 MHz ITS spectral allocation: potential, pitfalls, and applications
Author :
Fitz, Michael P. ; Krogmeier, James V. ; Grimm, Jimm ; Gansman, Jerome A. ; Chen, Tai-Ann ; Magnusen, Timothy M.
Author_Institution :
Ohio State Univ., Columbus, OH, USA
fDate :
10/1/1996 12:00:00 AM
Abstract :
In 1992 five narrowband frequency pairs in the 220-222 MHz band were allocated for intelligent transportation system (ITS) applications. These allocations are capable of supporting low-rate digital communications (4-30 kb/s). This article examines potential applications within the ITS program which can effectively use the low data rate that these allocations can provide. An overview of the narrowband wireless data communication challenges and the communication theoretic techniques likely to be employed on high-performance modems is provided. An experimental system was built, and preliminary field test results are presented which demonstrate that spectral efficiencies in excess of 3 b/s/Hz are achievable in practical modems
Keywords :
VHF radio propagation; data communication; digital radio; frequency allocation; information theory; intelligent control; land mobile radio; modems; road traffic; road vehicles; traffic control; 220 to 222 MHz; 4 to 30 kbit/s; ITS spectral allocation; VHF; communication theory; experimental system; field test results; high-performance modems; intelligent transportation system; land mobile radio; low data rate; low-rate digital communications; multipath propagation; narrowband frequency pairs; narrowband wireless data communication; spectral efficiencies; Communication system traffic; Data communication; Instruments; Intelligent sensors; Intelligent transportation systems; Mobile communication; Modems; Narrowband; Radio frequency; Road transportation;
Journal_Title :
Communications Magazine, IEEE
