In this paper, we evaluate by computer simulations the throughput performance of rate compatible punctured turbo coded hybrid ARQ (RCPT HARQ) for direct sequence code division multiple access (DS-CDMA) with antenna diversity reception and rake combining in a frequency selective Rayleigh fading channel. The impact of a range of transmission system parameters and propagation parameters (viz.: the...

Coding with a single fixed rate may not achieve the maximum throughput of a compound channel if the transmitter only has access to channel state statistics. Superposition coding for broadcast channels can be employed to increase the throughput. We study the optimal rate allocation for finite level superposition coding to maximize the throughput. Results show 2-level superposition coding is adeq...

For many experimental scientists, scienti c progress and quality of research are strongly linked to computing throughput. In other words, most scientists are concerned with how many oating point operations per week or per month they can extract from their computing environment rather than the number of such operations the environment can provide them per second or minute. Floating point operati...

We propose a new direct-sequence code division multiple access (CDMA) strategy for combining voice and variable-rate data. Our admission control policy uses a reservation policy for voice calls and different variable-rate schemes for data to maximize throughput on the residual bandwidth unused by voice. The data schemes we consider include variable bit rate (VBR), multicode (MC), and variable c...

Abstract: A key problem with IEEE 802.11 technology is adaptation of the transmission rates to the changing channel conditions, which is more challenging in vehicular networks. Although rate adaptation problem has been extensively studied for static residential and enterprise network scenarios, there is little work dedicated to the IEEE 802.11 rate adaptation in vehicular networks. Here, the au...