A framework for guaranteeing statistical QoS
IEEE/ACM Transactions on Networking (TON)
Performance Guarantees in Communication Networks
Performance Guarantees in Communication Networks
Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
QoS provisioning in wireless networks: Research Articles
Wireless Communications & Mobile Computing - RRM for Next-Generation Wireless and Mobile Communication Systems
Effective capacity: a wireless link model for support of quality of service
IEEE Transactions on Wireless Communications
Quality-of-Service Driven Power and Rate Adaptation over Wireless Links
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Capacity of fading channels with channel side information
IEEE Transactions on Information Theory
Fading channels: information-theoretic and communications aspects
IEEE Transactions on Information Theory
Instantaneous Capacity of OFDM on Rayleigh-Fading Channels
IEEE Transactions on Information Theory
Capacity limits of MIMO channels
IEEE Journal on Selected Areas in Communications
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In this paper, we study the power allocation scheme for a single user, multi-channel system, e.g. orthogonal frequency-division multiplexing (OFDM) systems, under time-variant wireless fading channels. We assume the receiver feeds back perfectly estimated channel state information (CSI) to the transmitter after a processing delay. The objective of the power allocation is to maximize physical (PHY) layer throughput under quality-of-service (QoS) constraint. The QoS measure of our consideration is a triplet of data rate, delay, and delay bound violation probability. A two-step suboptimal power allocation scheme is proposed which addresses the imperfect CSI issue. In the first step, the total transmission power that can be used by one block is determined according to the summation of the channel gains of all the channels. In the second step, the total transmission power is allocated to all the channels. Compared to the optimal power allocation scheme designed for the perfect CSI scenario, the proposed power allocation scheme reduces the computation complexity significantly while achieves comparable performance.