Throughput Maximization in Poisson Fading Channels with Limited Feedback

A shot-noise limited single-user single-input single-output (SISO) Poisson fading channel with partial channel state information (CSI) at the transmitter and perfect CSI at the receiver is considered. We address an optimal transmit power allocation problem that maximizes the ergodic capacity of the...

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Vydané v:IEEE transactions on communications Ročník 61; číslo 10; s. 4343 - 4356
Hlavní autori: YuanYuan He, Dey, Subhrakanti
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York, NY IEEE 01.10.2013
Institute of Electrical and Electronics Engineers
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ISSN:0090-6778, 1558-0857
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Abstract A shot-noise limited single-user single-input single-output (SISO) Poisson fading channel with partial channel state information (CSI) at the transmitter and perfect CSI at the receiver is considered. We address an optimal transmit power allocation problem that maximizes the ergodic capacity of the SISO Poisson fading channel subject to peak and average power constraints with only quantized CSI available at the transmitter, acquired via a no-delay and error-free feedback link with finite-rate from the receiver to the transmitter. Due to the non-convexity of the proposed optimization problem, a globally optimum solution is difficult to obtain. However, we manage to obtain a locally optimal quantized power allocation (QPA) scheme by solving its dual Lagrangian optimization problem. We develop two efficient optimal QPA algorithms for solving the dual optimization problem and show that both of these algorithms converge to the globally optimal solution of the dual problem. A low-complexity near-optimal QPA algorithm is also derived for the case of large number of feedback bits. The results are then extended to the high peak signal-to-noise ratio (SNR) regime and an explicit expression for the approximate asymptotic ergodic capacity behavior in the high SNR regime with high rate quantization (as the number of feedback bits goes to infinity) is also provided. It is seen via numerical simulations that this asymptotic capacity expression correctly approaches the capacity of the corresponding full CSI case as the number of feedback bits becomes large. Finally, the effectiveness of the derived algorithms is examined through numerical simulations.
AbstractList A shot-noise limited single-user single-input single-output (SISO) Poisson fading channel with partial channel state information (CSI) at the transmitter and perfect CSI at the receiver is considered. We address an optimal transmit power allocation problem that maximizes the ergodic capacity of the SISO Poisson fading channel subject to peak and average power constraints with only quantized CSI available at the transmitter, acquired via a no-delay and error-free feedback link with finite-rate from the receiver to the transmitter. Due to the non-convexity of the proposed optimization problem, a globally optimum solution is difficult to obtain. However, we manage to obtain a locally optimal quantized power allocation (QPA) scheme by solving its dual Lagrangian optimization problem. We develop two efficient optimal QPA algorithms for solving the dual optimization problem and show that both of these algorithms converge to the globally optimal solution of the dual problem. A low-complexity near-optimal QPA algorithm is also derived for the case of large number of feedback bits. The results are then extended to the high peak signal-to-noise ratio (SNR) regime and an explicit expression for the approximate asymptotic ergodic capacity behavior in the high SNR regime with high rate quantization (as the number of feedback bits goes to infinity) is also provided. It is seen via numerical simulations that this asymptotic capacity expression correctly approaches the capacity of the corresponding full CSI case as the number of feedback bits becomes large. Finally, the effectiveness of the derived algorithms is examined through numerical simulations.
Author Dey, Subhrakanti
YuanYuan He
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Issue 10
Keywords Parameter estimation
Information rate
Transmitter
Feedback regulation
limited feedback
Power allocation
Optimization
wireless optical communications
Poisson fading channels
Optimal allocation
Signal quantization
Channel estimation
Delay time
Convexity
Peak power
Fading channels
Optimal algorithm
Asymptotic behavior
Transfer characteristic
Ergodicity
Information transmission
Free-space optical communication
Algorithm performance
Optimal solution
SISO system
Shot noise
Signal to noise ratio
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StartPage 4343
SubjectTerms Algorithm design and analysis
Applied sciences
Detection, estimation, filtering, equalization, prediction
Electrical Engineering with specialization in Signal Processing
Elektroteknik med inriktning mot signalbehandling
Exact sciences and technology
Fading
Free-space optical communication
Information, signal and communications theory
limited feedback
Optical transmitters
Optimization
Poisson fading channels
Radiocommunications
Receivers
Resource management
Sampling, quantization
Signal and communications theory
Signal, noise
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Transmitters. Receivers
wireless optical communications
Title Throughput Maximization in Poisson Fading Channels with Limited Feedback
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