Achievable information rates of M-ary PPM impulse radio for UWB channels and rake reception

Authors:
Nazl Güney;Hakan Deliç;Fatih Alagöz
Affiliations:
Wireless Communications Laboratory, Department of Electrical and Electronics Engineering, Boǧaziçi University Bebek, Istanbul, Turkey;Wireless Communications Laboratory, Department of Electrical and Electronics Engineering, Boǧaziçi University, Bebek, Istanbul, Turkey;Department of Computer Engineering, Boǧaziçi University, Bebek, Istanbul, Turkey
Venue:
IEEE Transactions on Communications
Year:
2010

Citing 5
Cited 1

Elements of information theory

Elements of information theory
Digital modulation and coding

Digital modulation and coding
Capacity of time-hopping PPM and PAM UWB multiple access communications over indoor fading channels

EURASIP Journal on Wireless Communications and Networking
On the asymptotic distribution of the correlation receiver output for time-hopped UWB signals

IEEE Transactions on Signal Processing
INFORMATION THEORY OF WIDEBAND COMMUNICATIONS

IEEE Communications Surveys & Tutorials

Approximation of Löwdin orthogonalization to a spectrally efficient orthogonal overlapping PPM design for UWB impulse radio

Signal Processing

Quantified Score

Hi-index	0.00

Visualization

Abstract

The performance of impulse radio is investigated for ultra-wideband (UWB) channels and orthogonal Mary pulse position modulation (PPM) in terms of the maximum achievable information rate, where the outputs of the Mary correlation receiver implemented through the rake structure with conventional maximal ratio combining are subject to either soft or hard decisions. The major difference observed between the soft- and hard-output systems is that at low values of the mutual information the minimum information bit energy to noise ratio required for reliable communication increases with the constellation size for the hard-output systems. Furthermore, it is demonstrated that independent of the type of the output, achievable rates are considerably low at medium-to-large signalto-noise ratio (SNR) values in UWB channels compared to those in additive white Gaussian noise channels, as the frequencyselectivity of the UWB channel destroys the orthogonality of the transmitted PPM signals. Interference from other users and constellation size put additional constraints on the achievable rates at high SNR.