Asymmetric Cooperation Among Relays with Linear Precoding

Devroye, Natasha; Mehta, Neelesh B.; Molisch, Andreas F.

doi:10.1109/glocom.2007.835

Cited by 10 publications

(6 citation statements)

References 23 publications

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“…In addition, the cooperation between RSs has been studied to enhance multiuser transmission in the downlink of a cellular system. In order to manage the mutual interference, linear joint precoding schemes across a BS and RS(s) were proposed in [9], [10]. However, these previous works were focused on the single BS transmission.…”

Section: Introductionmentioning

confidence: 99%

Cooperative joint precoding for relay enhanced cellular system: Design and performance evaluation

Kwon

Park

et al. 2011

2011 7th International Wireless Communications and Mobile Computing Conference

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In this paper, we introduce the notion of a relay enhanced cellular system, where a relay station is located in the overlap area served by two base stations, and propose a cooperative joint precoding scheme for the relay enhanced cellular system. We consider a system in which two base stations apply linear precoding to minimize the interference at the relay station and the mobile stations and formulate the optimization problem to maximize the system capacity and design the multiuser precoding vector for each base station. We quantify the ergodic rate performance of the proposed multiuser precoding scheme through statistical analysis. Numerical results show that the proposed scheme can effectively cancel the interference and improve the sum rate performance for cell edge users.

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Section: Introductionmentioning

confidence: 99%

Cooperative joint precoding for relay enhanced cellular system: Design and performance evaluation

Kwon

Park

et al. 2011

2011 7th International Wireless Communications and Mobile Computing Conference

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“…Recently, the cooperation between RSs has been studied to enhance multiuser transmission in the downlink of a cellular system. In order to manage the mutual interference, linear joint precoding schemes across a BS and RS(s) were proposed in [7], [8]. These previous works were focused on the single BS transmission.…”

Section: Introductionmentioning

confidence: 99%

Cooperative joint precoding for relay enhanced cellular system over Nakagami-m fading channels

Kwon

Park

et al. 2011

2011 IEEE 7th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)

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In this paper, we introduce the notion of a relay enhanced cellular system, where a relay station is located in the overlap area served by two base stations. We propose a cooperative joint precoding scheme in the downlink of the relay enhanced cellular system to maximize the system capacity while eliminating the interference at the mobile stations. We formulate an optimization problem to maximize the system capacity and design the multiuser precoding vectors for each base station and the relay station. We analyze the ergodic rate performance of the proposed multiuser precoding scheme over Nakagami-m fading channels. Numerical results show that the proposed scheme can effectively cancel the interference and improve the sum rate and outage performance for cell edge users.Index Terms-Communication with relay, cooperative joint precoding, ergodic rate, Nakagami-m fading

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“…The difference between these precoding schemes and those in MIMO systems is mainly due to more complex network topology of cooperative systems that are comprised of the source, relay and destination nodes [11]. In [12], [13], antennas in multiple relays can be regarded as a kind of virtual antenna array where a distributed precoder can be applied between the relays and destinations. Unlike these precoder designs, the temporal-spatial precoding operation studied in this paper is applied to the virtual antenna array formed by cooperative behaviors between the source and relay nodes, which can well exploit the potential capacity of cooperative relaying communication systems [14].…”

Section: Introductionmentioning

confidence: 99%

Design on Precoder in Cooperative Spatial Multiplexing Systems with Amplify-and-Forward Relaying

Zheng

Long

Wang

et al. 2011

IEICE Trans. Commun.

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Simple half-duplex repetition-based relaying protocols can achieve spatial diversity at the expense of additional relaying signals in the time domain. In this paper, a linear unitary precoder based on a singular vector for cooperative systems with the amplify-and-forward (AF) relaying protocol is proposed in order to improve spectral efficiency. An exact expression of the precoder design is first derived for the case of equal power allocation. Then, water-filling power allocation is used in conjunction with the precoder to further increase the system capacity, where the precoder matrix is generated with an iterative process. From the implementation point of view, the channel state information (CSI) has to be estimated and quantized in systems, the detail of which is described in the sequel. The adaptive modulation and coding (AMC) technique with the proposed precoder is also discussed to achieve high throughput performance. Finally, numerical and simulation results are presented to demonstrate the effectiveness of the proposed technique in improving capacity and throughput.

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Asymmetric Cooperation Among Relays with Linear Precoding

Cited by 10 publications

References 23 publications

Cooperative joint precoding for relay enhanced cellular system: Design and performance evaluation

Cooperative joint precoding for relay enhanced cellular system: Design and performance evaluation

Cooperative joint precoding for relay enhanced cellular system over Nakagami-m fading channels

Design on Precoder in Cooperative Spatial Multiplexing Systems with Amplify-and-Forward Relaying

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