A Low-Complexity Multicarrier Scheme with LDPC Coding for Mobile-to-Mobile Environment
Résumé
In this paper, we consider a mobile ad-hoc radio network in an urban area. The propagation environment between two endpoints can be modeled by a double-Rayleigh fading multipath channel. Such a mobile scenario justifies the use of filter bank based multicarrier (FBMC) transmission systems. This technique generalizes traditional cyclic prefix orthogonal frequency-division multiplexing (CP-OFDM), allowing the design of non-rectangular pulse shape filters. We show that this approach leads to a better interference mitigation in time-variant channels. We restrict our study to short filters and single-tap per sub-channel equalization in order to preserve a low-complexity transmultiplexer. In this study, we compare FBMC with short filters to CP-OFDM in terms of coded bit-error-rate performances, using a realistic mobile-to-mobile channel model.
Mots clés
time-varying multipath channels
mobile-to-mobile channel
Rayleigh fading
Doppler spectrum
inter-channel interference (ICI)
inter-symbol interference (ISI)
cyclic prefix (CP)
orthogonal frequency-division multiplexing (OFDM)
filter bank based multicarrier (FBMC)
time-frequency localization (TFL)
efficient realization
perfect reconstruction filters
low-density parity-check (LDPC)
discrete-time systems
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