A unified treatment of optimum pilot overhead in multipath fading channels

Authors:
Nihar Jindal;Angel Lozano
Affiliations:
University of Minnesota, Minneapolis, MN;Universitat Pompeu Fabra, Barcelona, Spain
Venue:
IEEE Transactions on Communications
Year:
2010

Citing 14
Cited 0

Hessian and concavity of mutual information, differential entropy, and entropy power in linear vector Gaussian channels

IEEE Transactions on Information Theory
Optimal insertion of pilot symbols for transmissions over time-varying flat fading channels

IEEE Transactions on Signal Processing
Average-rate optimal PSAM transmissions over time-selective fading channels

IEEE Transactions on Wireless Communications
Optimal training for MIMO frequency-selective fading channels

IEEE Transactions on Wireless Communications
Interplay of spectral efficiency, power and doppler spectrum for reference-signal-assisted wireless communication

IEEE Transactions on Wireless Communications - Part 1
The effect upon channel capacity in wireless communications of perfect and imperfect knowledge of the channel

IEEE Transactions on Information Theory
Communication on the Grassmann manifold: a geometric approach to the noncoherent multiple-antenna channel

IEEE Transactions on Information Theory
Fading channels: how perfect need "perfect side information" be?

IEEE Transactions on Information Theory
How much training is needed in multiple-antenna wireless links?

IEEE Transactions on Information Theory
Capacity of multiple-antenna fading channels: spatial fading correlation, double scattering, and keyhole

IEEE Transactions on Information Theory
Optimum power allocation for parallel Gaussian channels with arbitrary input distributions

IEEE Transactions on Information Theory
How Good Is PSK for Peak-Limited Fading Channels in the Low-SNR Regime?

IEEE Transactions on Information Theory
Channel Coherence in the Low-SNR Regime

IEEE Transactions on Information Theory
Multiple-Antenna Signaling Over Fading Channels With Estimated Channel State Information: Capacity Analysis

IEEE Transactions on Information Theory

Quantified Score

Hi-index	0.00

Visualization

Abstract

The optimization of the pilot overhead in single-user wireless fading channels is investigated, and the dependence of this overhead on various system parameters of interest (e.g., fading rate, signal-to-noise ratio) is quantified. The achievable pilot-based spectral efficiency is expanded with respect to the fading rate about the no-fading point, which leads to an accurate order expansion for the pilot overhead. This expansion identifies that the pilot overhead, as well as the spectral efficiency penalty with respect to a reference system with genie-aided CSI (channel state information) at the receiver, depend on the square root of the normalized Doppler frequency. It is also shown that the widely-used block fading model is a special case of more accurate continuous fading models in terms of the achievable pilotbased spectral efficiency. Furthermore, it is established that the overhead optimization for multiantenna systems is effectively the same as for single-antenna systems with the normalized Doppler frequency multiplied by the number of transmit antennas.