We developed a cross-layer design which combines adaptive modulation and coding at the
physical layer with a truncated automatic repeat request protocol at the data link layer, in …

Relative to designs assuming no channel knowledge at the transmitter, considerably
improved communications become possible when adapting the transmitter to the intended …

Adaptive modulation improves the system throughput considerably by matching transmitter
parameters to time-varying wireless fading channels. Crucial to adaptive modulation is the …

Adaptive modulation has the potential to increase the system throughput significantly by
matching transmitter parameters to time-varying channel conditions. However, adaptive …

Central features of future 4G mobile communication systems are high-speed data
transmission (up to 1 Gb/s) and interactive multimedia services. For effective delivery of …

In recent years, a wealth of research has emerged addressing various aspects of mobile
communications signal processing. New applications and services are continually arising …

Adaptive coded modulation (ACM) is a promising tool for increasing the spectral efficiency of
time-varying mobile channels while maintaining a predictable bit-error rate (BER). An …

We study a wireless access system with adaptive modulation and coding (AMC) at the
physical layer, finite-length queuing at the data link layer and a TCP protocol at the transport …

Presented here is an approach to analyzing the effect of imperfect channel estimation on
adaptive modulation. The sensitivity of the main performance parameters to short-term and …

In this paper, a set of multiuser access schemes are proposed based on switched diversity
algorithms originally devised to select between antennas in a spatial diversity system …