Coding and Resource Scheduling in Packet Oriented Adaptive TDMA/OFDMA Systems
Paper i proceeding, 2006

Within the EU FP6 Integrated Project WINNER, adaptive transmission is investigated as a key technology for boosting the spectral efficiency of a new radio interface for 4G systems. Adaptive allocation and link adaptation of time-frequency chunks based on channel prediction in an OFDM-based system offers a significant potential to design a spectrally efficient system. The chunk size is typically defined based on the minimum coherence time and coherence bandwidth of the targeted channels. it is important to allow efficient channel coding and link retransmission schemes without restricting the resource scheduler, even for systems using small chunk sizes, to achieve multi-user diversity gains. In this paper we introduce some possible approaches to implement FEC coding and Hybrid ARQ and analyze their interplay with resource scheduling in packet oriented adaptive TDMA/OFDMA.

forward error correction coding (FEC)

adaptive transmission

Resource scheduling

spectral efficiency

Multiple access


4G mobile wireless systems

Forward error correction

link retransmissions

multiple access

Orthogonal Frequency Division Multiplexing (OFDM)


Tommy Svensson

Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk

Sorour Falahati

Chalmers, Signaler och system

Mikael Sternad

Proceedings IEEE Vehicular Technology Conference Spring, Melbourne, Australia


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