Efficient channel quality feedback schemes for adaptive modulation and coding of packet data

Döttling, M.; Raaf, Bernhard; Michel, J.

doi:10.1109/vetecf.2004.1400221

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…(1) PT obtains SNR d from PR through conventional channel quality feedback mechanism [36] and checks whether SNR d < SNR T . If yes, go to step 2.…”

Section: Protocol Descriptionmentioning

confidence: 99%

An orthogonal spectrum sharing scheme for wireless sensor networks

Ting

Han

Pandharipande

2011

J Wireless Com Network

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It is not economically viable to allocate a dedicated spectrum band to wireless sensor networks (WSNs). Moreover, sharing a spectrum band with incumbent (primary) system compromises the reliability and performance of both the systems due to interference from one system to another. In this article, we address this limitation by proposing a two-phase orthogonal spectrum sharing protocol for a WSN which exploits multiple sensor nodes to effectively cancel out the interference from a WSN to the primary system, and vice versa. As a consequence, it is possible to achieve spectrum access for the WSN without compromising on the performance of either systems. Performance of WSN as well as the primary system is quantified in terms of average received signal to noise ratio. We then validate the efficiency of the proposed scheme through analytical and simulation results.

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“…(1) PT obtains SNR d from PR through conventional channel quality feedback mechanism [36] and checks whether SNR d < SNR T . If yes, go to step 2.…”

Section: Protocol Descriptionmentioning

confidence: 99%

An orthogonal spectrum sharing scheme for wireless sensor networks

Ting

Han

Pandharipande

2011

J Wireless Com Network

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“…For example, with the exception of [16] and [23], previous works have not attempted to adjust the periodicity of the CQI reports to the specific needs of each MS. Rather, they have tried to reduce the cost of the CQI reports by: (i) not sending CQI reports if the channel condition has not significantly changed [7], [9], [10], [12], [19], [22]; (ii) sending a single CQI report to a group of MSs [15]; or (iii) sending a single CQI report for a subset of OFDM subchannels [19], [20]. All these works are orthogonal to the scheme and algorithms presented in this paper.…”

Section: Related Workmentioning

confidence: 99%

“…In [10] a similar scheme is proposed, which also takes into account the QoS requirements of each MS. In [7], a new metric for the performance of CQI schemes is proposed and studied. It takes into account the total resources consumed by each CQI scheme.…”

Section: Related Workmentioning

confidence: 99%

“…Decision-making schemes that might decide not to send certain CSI reports [7], [9], [10], [12], [19], [22], e.g., if the channel condition has not changed notably, cannot easily take advantage of the unused slots. This is because these slots are too short for regular packets and because the MS cannot rely on their availability.…”

Section: Preliminaries a Csi Channelsmentioning

confidence: 99%

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Efficient allocation of CQI channels in broadband wireless networks

Cohen

Grebla

2011

2011 Proceedings IEEE INFOCOM

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Abstract-Advanced wireless technologies such as MIMO require each mobile station (MS) to send a lot of feedback to the base station. This periodic feedback consumes much of the uplink bandwidth. This expensive bandwidth is very often viewed as a major obstacle to the deployment of MIMO and other advanced closed-loop wireless technologies. This paper is the first to propose a framework for efficient allocation of periodic feedback channels to the nodes of a wireless network. Several relevant optimization problems are defined and efficient algorithms for solving them are presented. A scheme for deciding when the BS should invoke each algorithm is also proposed and shown through simulations to perform very well.

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“…Schemes for feedback of multiple-antenna beamforming vectors. There are also some reports that do not fit into the above categories, e.g., [8], where schemes to reduce feedback rate for bursty packet data is discussed.…”

Section: Feedback Rate Reduction: Overview and State-of-the-artmentioning

confidence: 99%

Compression of Feedback for Adaptive Transmission and Scheduling

Eriksson

Ottosson

2007

Proc. IEEE

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In multiuser wireless radio systems, it may be possible to increase throughput by reducing the feedback-rate of channel quality data while meeting quality of service requirements. By Thomas Eriksson and Tony OttossonABSTRACT | For wireless systems with adaptive modulation and/or scheduling, feedback of channel quality information is often necessary. It has been questioned whether the increased system performance is worth the additional feedback rate and the increased algorithm complexity.In this paper, we study how the feedback rate can be minimized, without losing the gains due to adaptive modulation and multiuser diversity. We present an in-depth study of the literature in the area, and evaluate the performance of several state-of-the-art channel quality feedback schemes. By illustrating the compromise between system throughput and feedback channel rate for various schemes, we are able to give valuable insight in choice of method for feedback rate reduction. A major conclusion is that for multicarrier systems, a lossy compression scheme is the best choice, while for single-carrier systems, schemes limiting feedback to only high-SNR users show good performance. Another conclusion is that there are still many issues to study before the schemes can be used in practice.

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Efficient channel quality feedback schemes for adaptive modulation and coding of packet data

Cited by 9 publications

References 5 publications

An orthogonal spectrum sharing scheme for wireless sensor networks

An orthogonal spectrum sharing scheme for wireless sensor networks

Efficient allocation of CQI channels in broadband wireless networks

Compression of Feedback for Adaptive Transmission and Scheduling

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