[1] Xu Wei, Zhao Chunming,. Improved reduced-complexity bit and power allocation algorithmsfor multicarrier systems [J]. Journal of Southeast University (English Edition), 2007, 23 (1): 12-15. [doi:10.3969/j.issn.1003-7985.2007.01.003]

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Improved reduced-complexity bit and power allocation algorithmsfor multicarrier systems()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

23

Issue:

2007 1

Page:

12-15

Research Field:

Information and Communication Engineering

Publishing date:

2007-03-30

Info

Title:

Improved reduced-complexity bit and power allocation algorithmsfor multicarrier systems

Author(s):

Xu Wei;  Zhao Chunming

National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Keywords:

multicarrier modulation;  allocation algorithm;  bit loading;  computational complexity

PACS:

TN929

DOI:

10.3969/j.issn.1003-7985.2007.01.003

Abstract:

Based on the iterative bit-filling procedure, a computationally efficient bit and power allocation algorithm is presented.The algorithm improves the conventional bit-filling algorithms by maintaining only a subset of subcarriers for computation in each iteration, which reduces the complexity without any performance degradation.Moreover, a modified algorithm with even lower complexity is developed, and equal power allocation is introduced as an initial allocation to accelerate its convergence.Simulation results show that the modified algorithm achieves a considerable complexity reduction while causing only a minor drop in performance.

References:

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[2] Chow P S, Cioffi J M, Bingham A C.A practical discrete multitone transceiver loading algorithm for data transmission over spectrally shaped channels [J].IEEE Transactions on Communications, 1995, 43(2):773-775.
[3] Leke A, Cioffi J M.A maximum rate loading algorithm for discrete multitone modulation systems [C]//IEEE Globecom Proceedings.Phoenix, AZ, 1997, 3:1514-1518.
[4] Fasano A.On the optimal discrete bit loading for multicarrier systems with constraints [C]//IEEE VTC Proceedings.Seoul, Korea, 2003, 2:915-919.
[5] Lei M, Zhang P, Harada H, et al.An adaptive power distribution algorithm for improving spectral efficiency in OFDM [J].IEEE Transactions on Broadcasting, 2004, 50(3):347-351.
[6] Krongold B S, Ramchandran K, Jones D L.Computationally efficient optimal power allocation algorithms for multicarrier communication systems [J].IEEE Transactions on Communications, 2000, 48(1):23-27.
[7] Wyglinski A M, Labeau F, Kabal P.Bit loading with BER-constraint for multicarrier systems [J].IEEE Transactions on Wireless Communications, 2005, 4(4):1383-1387.
[8] Goldsmith A J, Chua S G.Variable-rate variable-power MQAM for fading channels [J].IEEE Transactions on Communications, 1997, 45(10):1218-1230.

Memo

Memo:

Biographies: Xu Wei(1982—), male, graduate;Zhao Chunming(corresponding author), male, doctor, professor, cmzhao2@seu.edu.cn.

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