Title :
A low-complexity lattice-based low-PAR transmission scheme for DSL channels
Author :
Collings, Iain B. ; Clarkson, I. Vaughan L
Author_Institution :
Sch. of Electr. & Inf. Eng., Univ. of Sydney, NSW, Australia
fDate :
5/1/2004 12:00:00 AM
Abstract :
This paper presents a new low-complexity multicarrier modulation (MCM) technique based on lattices which achieves a peak-to-average power ratio (PAR) as low as three. The scheme can be viewed as a "drop in" replacement for the discrete multitone (DMT) modulation of an asymmetric digital subscriber line modem. We show that the lattice-MCM retains many of the attractive features of sinusoidal-MCM, and does so with lower implementation complexity, O(N), compared with DMT, which requires O(NlogN) operations. We also present techniques for narrowband interference rejection and power profiling. Simulation studies confirm that performance of the lattice-MCM is superior, even compared with recent techniques for PAR reduction in DMT.
Keywords :
OFDM modulation; digital subscriber lines; interference suppression; telecommunication channels; digital subscriber line channels; discrete multitone modulation; low complexity lattice; multicarrier modulation; narrowband interference rejection; peak-to-average power ratio transmission; power profiling; Australia; DSL; Digital modulation; Interference; Lattices; Modulation coding; Narrowband; OFDM modulation; Peak to average power ratio; Transmitters; DSL; Digital subscriber line; MCM; PAR; lattice codes; multicarrier modulation; peak-to-average ratio;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2004.826261