Proceedings Article10.1109/GLOCOM.2005.1578268
Efficient adaptive loading algorithm with simplified bandwidth optimization method for OFDM systems
Kaiming Liu,Feifei Yin,Wenbo Wang,Yuanan Liu +3 more
- 01 Jan 2005
- Vol. 5, pp 5
9
TL;DR: A simplified bandwidth optimization method is proposed to search for all usable subchannels for loading algorithms which aim at the minimization of power consumption with constraint of constant data rate and target bit error rate (BER).
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Abstract: A crucial aspect for adaptive bit and power loading algorithms is to determine all usable subchannels. In this paper, a simplified bandwidth optimization method is proposed to search for all usable subchannels for loading algorithms which aim at the minimization of power consumption with constraint of constant data rate and target bit error rate (BER). Based on this method, an efficient loading algorithm is developed. Simulation results show that the proposed algorithm can achieve the same bit allocation results to that of the well-known Hughes-Hartogs and Fischer et al. algorithm. This algorithm is appropriate for OFDM systems in time-varying channels due to its low complexity
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Citations
Power Loading in Parallel Diversity Channels Based on Statistical Channel Information
Justin P. Coon,Rafael Cepeda +1 more
TL;DR: It is shown that there exists an arbitrary number of power allocation schemes that achieve capacity in systems operating in parallel channels comprised of single-input multiple-output (SIMO) Nakagami-m fading subchannels when the number of degrees of freedom L tends to infinity, and it is proved that statistical waterfilling is one such scheme.
8
Optimal and efficient bit loading for OFDM in the presence of channel uncertainty
Chunhui Liu,Rudolf Mathar +1 more
- 30 Dec 2008
TL;DR: This paper considers optimal bit loading for orthogonal frequency division multiplexing (OFDM) with imperfect CSI subject to channel estimation with frame length as an important control parameter, while soft channel estimation and the Cramer-Rao bound are used to include the effect of channel estimation.
Multi-User MIMO-OFDM with Adaptive Resource Allocation over Frequency Selective Fading Channel
Yongbo Tan,Qing Chang +1 more
- 18 Nov 2008
TL;DR: The scheme proposed here attempts to make the MIMO-OFDM systems more flexible and robust to channel variations and provides a low complexity algorithm based on the greedy algorithm for the adaptive bit and power allocation over the frequency selective fading channel.
4
Adaptive power loading with BER-constraint for OFDM systems
TL;DR: Simulation results indicate the superiority of the proposed algorithm in terms of BER performance and algorithmic complexity, while guaranteeing the target overall BER.
2
A novel fast algorithm proposed based on Leke’s algorithm
Mingjuan Huang,Laibo Zheng,Xinfeng Zhao,Jintang Wang +3 more
- 13 Mar 2013
TL;DR: Simulation results show that the improved algorithm proposed based on the new method also can achieve the optimal solution to that of the well-known optimal algorithm - Greedy algorithm with lower computational complexity.
2
References
A maximum rate loading algorithm for discrete multitone modulation systems
A. Leke,J.M. Cioffi +1 more
- 03 Nov 1997
TL;DR: A novel approach to loading for discrete multitone modulation (DMT) systems is proposed, which assigns energy to different subchannels in order to maximize the data rate for a given margin while previous algorithms proposed are aimed mainly at maximizing the margin at a target data rate.
Prolog to adaptive multicarrier modulation: a convenient framework for time-frequency processing in wireless communications
T. Keller,L. Hanzo +1 more
- 01 May 2000
TL;DR: A wide-ranging throughput comparison of the schemes discussed herein under the unified constraint of a fixed target bit error rate of 10/sup -4/.
A practical discrete multitone transceiver loading algorithm for data transmission over spectrally shaped channels
TL;DR: A finite-granularity, loading algorithm for a discrete multitone (DMT) modulation system that offers significant implementational advantages over the well-known water-pouring method and the earlier Hughes-Hartogs algorithm while typically suffering only negligible performance degradation relative to the optimal solution.
On the optimal discrete bit loading for multicarrier systems with constraints
Antonio Fasano
- 22 Apr 2003
TL;DR: In this paper optimal discrete bit loading algorithms for multicarrier systems employing DMT (discrete multitone) are proposed, derived under the additional constraints on either the maximum allowable energy for each subchannel or the maximum cardinality of the QAM constellations that are used.