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
•Dissertation
Sum-Rate Maximization For Two-Way Active Channel With Unequal Subchannel Noise Powers
Ashkan Kiani
- 01 Jun 2016
TL;DR: This thesis develops an analytical method with efficient computations for optimal sources and channel power allocation, by utilizing Karush-Kuhn-Tucker (KKT) conditions, to study the problem of joint power allocation and design of a parallel channel with orthogonal subchannels.
1
•Posted Content
Power Loading in Parallel Channels with Channel Distribution Information at the Transmitter
Justin P. Coon,Rafael Cepeda +1 more
- 26 Mar 2010
TL;DR: The ergodic capacity of parallel channels is investigated with a view to designing the power allocation strategies that optimise this performance measure under the assumption that perfect, instantaneous channel knowledge is available at the receiver whereas the transmitter only has knowledge of the fading distributions and/or the first and second moments of the subchannel gains.
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.
Bit and Power Allocation of Multiple Bit Error Rate OFDM Adaptive Modulation
王哲,张晓林 +1 more
TL;DR: A sub-optimal method for optimal bit-power allocation in multiple bit error rate OFDM adaptive modulation is developed, utilizing QAM in OFDM subchannels, with low complexity and close-form expression for bit allocating results.
References
Patent
Ensemble modem structure for imperfect transmission media
Dirk Hughes-Hartogs
- 05 May 1986
TL;DR: In this paper, a high speed modem that transmits and receives digital data on an ensemble of carrier frequencies spanning the usable band of a dial-up telephone line is described, which includes a system for variably allocating data and power among the carriers to compensate for equivalent noise and to maximize the data rate.
807
Computationally efficient optimal power allocation algorithms for multicarrier communication systems
TL;DR: This work presents an optimal, computationally efficient, integer-bit power allocation algorithm for discrete multitone modulation using efficient lookup table searches and a Lagrange-multiplier bisection search that can replace the use of suboptimal methods.
476
Beyond 3G: wideband wireless data access based on OFDM and dynamic packet assignment
TL;DR: In this article, the authors discuss packet data transmission rates of 2-5 Mbps in macrocellular environments and up to 10 Mbps in microcellular and indoor environments as a complementary service to evolving second-and third-generation wireless systems.
370
Transmit power and bit allocations for OFDM systems in a fading channel
Ji-Ho Jang,Kwang Bok Lee,Yong-Hwan Lee +2 more
- 01 Dec 2003
TL;DR: The proposed algorithm, based on the water-filling approach, is appropriate for OFDM systems in a time varying wireless channel for its low computational complexity and good performance.
Bandwidth optimization for high speed data transmission over channels with severe intersymbol interference
P.S. Chow,John M. Cioffi +1 more
- 06 Dec 1992
TL;DR: Algorithms are presented for finding the optimal transmission bandwidth in terms of either maximizing the overall data throughput or maximizing the system performance margin, given a fixed target data rate, for high speed data transmission over channels with severe intersymbol interference.
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