Power control for delay constrained multi-channel communications using outdated CSI

Xiaochen Li; Fengming Cao; Xihua Dong; Dapeng Wu

doi:10.1002/wcm.928

Power control for delay constrained multi-channel communications using outdated CSI

Xiaochen Li, Fengming Cao, Xihua Dong, Dapeng Wu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

2 Citations (Scopus)

Abstract

In this paper, we study the power allocation scheme for a single user, multi-channel system, e.g., orthogonal frequency-division multiplexing (OFDM) systems, under time-variant wireless fading channels. We assume the receiver feeds back perfectly estimated channel state information (CSI) to the transmitter after a processing delay. The objective of the power allocation is to maximize throughput subject to quality-of-service (QoS) constraint. The QoS measure of our consideration is a triplet of data rate, delay, and delay bound violation probability. A two-step sub-optimal power allocation scheme is proposed to address the impact of outdated CSI. In the first step, the total transmission power that can be used within one block is determined according to the summation of the channel gains of all the channels. In the second step, the total transmission power is allocated among all the channels. The proposed power control scheme is less sensitive to the feedback delay. Compared to the optimal power allocation scheme designed for the perfect CSI scenario, it has lower computational complexity while achieving comparable capacity. Copyright © 2010 John Wiley & Sons, Ltd. This paper studies multi-channel power allocation problem under time-variant wireless fading channels. We assume the receiver feeds back perfectly estimated channel state information (CSI) to the transmitter after a processing delay. A two step power allocation scheme is proposed to address the impact of outdated CSI. Copyright © 2010 John Wiley & Sons, Ltd.

Original language	English
Pages (from-to)	1302-1311
Journal	Wireless Communications and Mobile Computing
Volume	11
Issue number	9
DOIs	https://doi.org/10.1002/wcm.928
Publication status	Published - Sept 2011
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

effective capacity
multi-channel
power allocation
QoS guarantees

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abstract = "In this paper, we study the power allocation scheme for a single user, multi-channel system, e.g., orthogonal frequency-division multiplexing (OFDM) systems, under time-variant wireless fading channels. We assume the receiver feeds back perfectly estimated channel state information (CSI) to the transmitter after a processing delay. The objective of the power allocation is to maximize throughput subject to quality-of-service (QoS) constraint. The QoS measure of our consideration is a triplet of data rate, delay, and delay bound violation probability. A two-step sub-optimal power allocation scheme is proposed to address the impact of outdated CSI. In the first step, the total transmission power that can be used within one block is determined according to the summation of the channel gains of all the channels. In the second step, the total transmission power is allocated among all the channels. The proposed power control scheme is less sensitive to the feedback delay. Compared to the optimal power allocation scheme designed for the perfect CSI scenario, it has lower computational complexity while achieving comparable capacity. Copyright {\textcopyright} 2010 John Wiley & Sons, Ltd. This paper studies multi-channel power allocation problem under time-variant wireless fading channels. We assume the receiver feeds back perfectly estimated channel state information (CSI) to the transmitter after a processing delay. A two step power allocation scheme is proposed to address the impact of outdated CSI. Copyright {\textcopyright} 2010 John Wiley & Sons, Ltd.",

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AU - Li, Xiaochen

AU - Cao, Fengming

AU - Dong, Xihua

AU - Wu, Dapeng

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N2 - In this paper, we study the power allocation scheme for a single user, multi-channel system, e.g., orthogonal frequency-division multiplexing (OFDM) systems, under time-variant wireless fading channels. We assume the receiver feeds back perfectly estimated channel state information (CSI) to the transmitter after a processing delay. The objective of the power allocation is to maximize throughput subject to quality-of-service (QoS) constraint. The QoS measure of our consideration is a triplet of data rate, delay, and delay bound violation probability. A two-step sub-optimal power allocation scheme is proposed to address the impact of outdated CSI. In the first step, the total transmission power that can be used within one block is determined according to the summation of the channel gains of all the channels. In the second step, the total transmission power is allocated among all the channels. The proposed power control scheme is less sensitive to the feedback delay. Compared to the optimal power allocation scheme designed for the perfect CSI scenario, it has lower computational complexity while achieving comparable capacity. Copyright © 2010 John Wiley & Sons, Ltd. This paper studies multi-channel power allocation problem under time-variant wireless fading channels. We assume the receiver feeds back perfectly estimated channel state information (CSI) to the transmitter after a processing delay. A two step power allocation scheme is proposed to address the impact of outdated CSI. Copyright © 2010 John Wiley & Sons, Ltd.

AB - In this paper, we study the power allocation scheme for a single user, multi-channel system, e.g., orthogonal frequency-division multiplexing (OFDM) systems, under time-variant wireless fading channels. We assume the receiver feeds back perfectly estimated channel state information (CSI) to the transmitter after a processing delay. The objective of the power allocation is to maximize throughput subject to quality-of-service (QoS) constraint. The QoS measure of our consideration is a triplet of data rate, delay, and delay bound violation probability. A two-step sub-optimal power allocation scheme is proposed to address the impact of outdated CSI. In the first step, the total transmission power that can be used within one block is determined according to the summation of the channel gains of all the channels. In the second step, the total transmission power is allocated among all the channels. The proposed power control scheme is less sensitive to the feedback delay. Compared to the optimal power allocation scheme designed for the perfect CSI scenario, it has lower computational complexity while achieving comparable capacity. Copyright © 2010 John Wiley & Sons, Ltd. This paper studies multi-channel power allocation problem under time-variant wireless fading channels. We assume the receiver feeds back perfectly estimated channel state information (CSI) to the transmitter after a processing delay. A two step power allocation scheme is proposed to address the impact of outdated CSI. Copyright © 2010 John Wiley & Sons, Ltd.

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Power control for delay constrained multi-channel communications using outdated CSI

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Research Keywords

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