Abstract
A series of field measurements were conducted to examine the transmission characteristics of different digital land mobile systems in the VHF/UHF frequency bands. This paper briefly describes these measurements, and then focuses on the measured data that describe the bipolar coding/FM modulation with a bit rate of 4800 bit/s and an RF channel spacing of 25 kHz. The basic error characteristics of the channel are presented by (i) the average bit error rate, (ii) the gap length distribution and (iii) the error burst length distribution. The measured error pattern was used in conjunction with some known error control techniques, to examine their effectiveness in reducing the overall errors. In particular, the block coding techniques used in the AMPS system were evaluated and compared with other, simpler techniques having higher coding rates. The results are presented in the form of curves relating the packet error rate to the packet length.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEE Proceedings F Communications, Radar and Signal Processing
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
