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- Alfonso Martinez, Albert Guillén i Fàbregas, Giuseppe Caire, Frans M. J. Willems
- IEEE Transactions on Information Theory
- 2007

The wideband regime of bit-interleaved coded modulation (BICM) in Gaussian channels is studied. The Taylor expansion of the coded modulation capacity for generic signal constellations at low signal-to-noise ratio (SNR) is derived and used to determine the corresponding expansion for the BICM capacity. Simple formulas for the minimum energy per bit and the… (More)

- Alfonso Martinez, Albert Guillén i Fàbregas, Giuseppe Caire
- IEEE Transactions on Information Theory
- 2006

This correspondence presents a simple method to accurately compute the error probability of bit-interleaved coded modulation (BICM). Thanks to the binary-input output-symmetric (BIOS) nature of the channel, the pairwise error probability (PEP) is equal to the tail probability of a sum of random variables with a particular distribution. This probability is… (More)

- Riccardo De Gaudenzi, Albert Guillén i Fàbregas, Alfonso Martinez
- Int. J. Satellite Communications Networking
- 2006

SUMMARY This paper investigates the design of power and spectrally efficient coded modulations based on amplitude phase shift keying (APSK) modulation with application to satellite broadband communications. APSK represents an attractive modulation format for digital transmission over nonlinear satellite channels due to its power and spectral efficiency… (More)

- Alfonso Martinez, Albert Guillén i Fàbregas, Giuseppe Caire, Frans M. J. Willems
- IEEE Transactions on Information Theory
- 2008

We revisit the information-theoretic analysis of bit-interleaved coded modulation (BICM) by modeling the BICM decoder as a mismatched decoder. The mismatched decoding model is well defined for finite, yet arbitrary, block lengths, and naturally captures the channel memory among the bits belonging to the same symbol. We give two independent proofs of the… (More)

- Jonathan Scarlett, Alfonso Martinez, Albert Guillén i Fàbregas
- 2015 IEEE International Symposium on Information…
- 2015

This paper studies likelihood decoding for channel coding over discrete memoryless channels. It is shown that the likelihood decoder recovers the same random-coding error exponents as the maximum-likelihood decoder for i.i.d. and constant-composition random codes. The role of mismatch in likelihood decoding is studied, and the notion of the mismatched… (More)

- Łukasz Adaszek, Alfonso Carbonero Martinez, Stanisław Winiarczyk
- Veterinary parasitology
- 2011

The aim of this paper was to determine the factors affecting the development of canine babesiosis in Poland. The studies included 800 animals from 16 polish voivodeships-districts (50 from each voivodeship) with suspected piroplasmosis. Hematological and molecular tests confirmed infections in 158 animals. Analysis of the genetic material using the… (More)

- Albert Guillen i Fabregas, Alfonso Martinez
- 2010 IEEE Information Theory Workshop
- 2010

The performance of bit-interleaved coded modulation (BICM) with shaping (i.e., non-equiprobable bit probabilities) is studied. For the AWGN channel, the rates achievable with BICM and shaping are practically identical to those of coded modulation or multilevel coding, virtually closing the gap that made BICM suboptimal in terms of information rates.

- Jonathan Scarlett, Alfonso Martinez, Albert Guillén i Fàbregas
- IEEE Transactions on Information Theory
- 2013

This paper studies the second-order asymptotics of coding rates for the discrete memoryless multiple-access channel (MAC) with a fixed target error probability. Using constant-composition random coding, coded time-sharing, and a variant of Hoeffding's combinatorial central limit theorem, an inner bound on the set of locally achievable second-order coding… (More)

- Albert Guillén i Fàbregas, Ingmar Land, Alfonso Martinez
- IEEE Transactions on Information Theory
- 2013

This paper determines the range of feasible values of standard error exponents for binary-input memoryless symmetric channels of fixed capacity <i>C</i> and shows that extremes are attained by the binary symmetric and the binary erasure channel. The proof technique also provides analogous extremes for other quantities related to Gallager's… (More)

- Alfonso Martinez
- IEEE Transactions on Information Theory
- 2011

Communication across an additive exponential noise (AEN) channel is studied. The AEN channel is derived from a continuous-time Gaussian channel by assuming decoherence between the signal and noise components. Decoherence renders impossible the use of the complex amplitude and information is transmitted by modulating the signal energy. The AEN channel is… (More)