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
Non-iterative bit-loading algorithm for ADSL-type DMT applications
Marie Zwingelstein-Colin,M. Gazalet,Mohamed Gharbi +2 more
- 01 Dec 2003
TL;DR: The authors propose a solution to the bit-loading problem for discrete multitone (DMT) modulation on digital subscriber loops (DSL), which involves less complex calculations than the existing algorithms and is slightly more efficient than existing algorithms.
30
Performance analysis of adaptive loading OFDM under Rayleigh fading
B. Canpolat,Yalcin Tanik +1 more
TL;DR: The performance of adaptive loading orthogonal frequency-division multiplexing (OFDM) under Rayleigh fading with maximal ratio-combining (MRC) diversity at the receiver is investigated and a maximum-rate adaptive-loading strategy is derived for uncoded quadrature-amplitude-modulation modulated OFDM.
24
On optimal bit loading for multitone ADSL
D.W. Lin
- 01 Jan 2000
TL;DR: This work presents a solution based on the Lagrange multiplier approach to bit loading in digital subscriber line transmission employing discrete multitone (DMT) modulation, demonstrating that most existing algorithms are suboptimal.
7
A new loading algorithm for discrete multitone transmission
Robert F. H. Fischer,Johannes B. Huber +1 more
- 18 Nov 1996
TL;DR: A new loading algorithm for discrete multitone transmission is proposed, where rate is not distributed according to channel capacity, but rate and transmit power are assigned to maximize the signal-to-noise ratio in each carrier.
Patent
Ensemble modem structure for imperfect transmission media
迪克·胡斯·哈托格斯
- 19 May 1986
TL;DR: It’s time to get used to the idea that things are going to change.