Improving the One-Bit Feedback Algorithm for Distributed Beamforming

Song, Shuo; Thompson, John; Chung, Pei-Jung; Grant, Peter

doi:10.1109/wcnc.2010.5506562

Cited by 37 publications

(24 citation statements)

References 9 publications

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“…In order to improve the convergence rate of the algorithm, other algorithms based on one-bit feedback scheme are proposed [5][6][7][8][9][10]. The basic idea is that if a weight perturbation value makes the RSS of the received signal weaker, then the negative value of the perturbation tends to make RSS stronger.…”

Section: Related Workmentioning

confidence: 99%

“…The basic idea is that if a weight perturbation value makes the RSS of the received signal weaker, then the negative value of the perturbation tends to make RSS stronger. Based on this idea [5,9], when the receiver returns feedback 0, the sender first revokes the perturbation, and then the negative value of this perturbation is added as an additional term to the phase weight in the next time slot. Therefore, this strategy make full use of the feedback 0.…”

Section: Related Workmentioning

confidence: 99%

“…One bit feedback scheme is a useful way to obtain phase alignment gain, which avoids the problem of beamforming weight calculation and uses the stochastic optimization method to search the optimal value in the process of interaction between destination node and cooperative multi-senders [4,5]. The channel state information is not required in the entire process.…”

Section: Introductionmentioning

confidence: 99%

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Improved Directional Perturbation Algorithm for Collaborative Beamforming

Guo¹

2017

AJNC

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This paper discusses the collaborative beamforming problem using improved directional perturbation approach based on one bit feedback scheme. There are multiple transmitters and one receiver in our setup, all the transmitters send a common signal synchronously, the receiver return a one bit of feedback to the transmitters. Each transmitter uses only the one bit feedback and local information to adjust its phase in every time slot. An algorithm using directional perturbation approach based on one bit feedback is proposed to improve the convergence accuracy. The convergence properties of phase alignment are investigated by simulation, and the simulation results verify that the convergence accuracy of the proposed algorithm outperforms the original algorithm. Moreover, simulations also show that the proposed algorithm has advantages on scalability.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improved Directional Perturbation Algorithm for Collaborative Beamforming

Guo¹

2017

AJNC

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“…[3] and [4], have considered the algorithm in single carrier systems only. Because orthogonal frequency division multiplexing (OFDM) has several advantages over single-carrier modulation in wideband systems, a logical direction of research is to investigate how the algorithm performs with OFDM.…”

Section: Introductionmentioning

confidence: 99%

Distributed beamforming in OFDM-based systems over frequency-selective channels

Tissari

Hurnanen

Poikonen

2011

2011 IEEE EUROCON - International Conference on Computer as a Tool

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Earlier publications on distributed beamforming have discussed only single carrier systems. Because orthogonal frequency division multiplexing has several advantages over single-carrier modulation in wideband systems, a logical direction of research is to investigate how such algorithm performs with OFDM. In this paper, we present a modified and further optimized version of a recently proposed distributed beamforming algorithm and incorporate it to a system using OFDM. The functionality of the algorithm is verified in simulations using realistic, frequency-selective channels. Based on extensive simulation studies, we recommend specific parameter values for the beamforming algorithm with the aims of maximizing the speed of convergence and asymptotic received power, and minimizing the amount of feedback required.

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“…Later, this algorithm was developed to account for carrier frequency errors among transmitters in [9]. Also, an improved algorithm which can yield a faster convergence speed by making use of both successful and failed perturbation results was presented in [10].…”

Section: Introductionmentioning

confidence: 99%

One-bit feedback algorithm with decreasing step size for distributed beamforming

Song

Thompson

2010

2010 Second UK-India-IDRC International Workshop on Cognitive Wireless Systems (UKIWCWS)

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An iterative algorithm with a decreasing step size is proposed for distributed transmit beamforming to achieve carrier phase alignment at the receiver. The transmitters apply random perturbations on their phase offsets and adjust them based on one bit feedback from the receiver in each iteration. The perturbation step size becomes smaller when the phase angles at the receiver get closer to coherence. The step size is decreased by a specified ratio every time the number of successive failed perturbations surpasses a certain threshold. The proposed algorithm has an improvement in the convergence speed of phase alignment compared to the original iterative algorithm in the literature which has a fixed step size during the convergence process.

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Improving the One-Bit Feedback Algorithm for Distributed Beamforming

Cited by 37 publications

References 9 publications

Improved Directional Perturbation Algorithm for Collaborative Beamforming

Improved Directional Perturbation Algorithm for Collaborative Beamforming

Distributed beamforming in OFDM-based systems over frequency-selective channels

One-bit feedback algorithm with decreasing step size for distributed beamforming

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