Paper Info
Title
Multicarrier/Qam-Level-Controlled Adaptive Modulation For Land Mobile Communication Systems
Abstract
A multicarrier and an adaptive modulation combined system, where a suitable level of quadrature amplitude modulation (QAM) is selected for each carrier and time-slot using a OAM-level selection scheme, is proposed for digital land mobile communications. The advantages of the system are a mode in which information cannot be transmitted under adverse propagation conditions and a buffer memory to limit a transmission delay time. The OAM-level of each carrier is also controlled collectively according to the amount of the stored data bits in the memory. We confirmed the bit error rate (BER) performances of the system using computer simulation and we found that the system provided a noticeable BER improvement over frequency-selective fading channels and that the selection scheme was effective for a low maximum Doppler frequency and a small size of the memory.
Year
DOI
Venue
1997
10.1109/PIMRC.1997.627057
PIMRC '97 - EIGHTH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS: WAVES OF THE YEAR 2000+, TECHNICAL PROGRAM, PROCEEDINGS, VOLS 1-3
Keywords
DocType
Citations 
adaptive systems,adaptive modulation,quadrature amplitude modulation,computer simulation,doppler effect,amplitude modulation,digital radio,propagation delay,bit error rate,mobile communication,fading
Conference
2
PageRank 
References 
Authors
0.49
2
2
Name
Order
Citations
PageRank
Kiyoshi Hamaguchi18216.05
eimatsu moriyama285.26