Title :
Multiuser bit loading for multicarrier systems
Author :
Lee, Jungwon ; Sonalkar, Ranjan V. ; Cioffi, John M.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., CA
fDate :
7/1/2006 12:00:00 AM
Abstract :
A multiuser bit-loading problem is investigated in multicarrier communication systems. Assuming knowledge of all the channel gains, we propose a multiuser bit-loading algorithm that attempts to minimize the total power to transmit a target rate-sum of all users. It is shown that this algorithm is optimal when the interference among users is nonexistent or strong. The simulation results show that the proposed algorithm finds a near-optimal solution for very-high-speed digital subscriber line systems
Keywords :
digital subscriber lines; interference (signal); matrix algebra; VDSL; greedy algorithm; interference; multicarrier communication systems; multiuser bit loading; very-high-speed digital subscriber line systems; Background noise; Communication systems; Crosstalk; DSL; Frequency division multiplexing; Interference; Modulation coding; OFDM modulation; Radio spectrum management; Signal to noise ratio; Bit loading; discrete multitone (DMT); dynamic spectrum management; orthogonal frequency-division multiplexing (OFDM); power allocation;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2006.877955
