Transmit beamformer design with a PAPR constraint to trade-off between beampattern shape and power efficiency

Date

2020-04-01

Author

Çayır, Ömer
Candan, Çağatay

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

228
views

0
downloads

This study examines the effect of peak-to-average power ratio (PAPR) constraint on the transmit beamformer design problem with the goal of establishing a trade-off between the power efficiency (maximizing the average transmitted power) and other metrics such as the power level fluctuation in mainlobe, peak-sidelobe level (PSL), etc. Typically, unimodular weights are utilized in transmit beamforming to maximize the average transmitted power. Yet, unimodular weights maximize the power efficiency at the expense of other performance metrics. It is shown that even a slight relaxation of the design problem from the unimodular condition (PAPR = 1), say setting PAPR <= 1.1, results in a significant improvement in other performance metrics at a negligible loss of power efficiency. To achieve the trade-off between the metrics, an alternating direction method of multipliers (ADMM) based solution to the transmit beamformer design is given. The suggested solution is applicable to both narrowband and wideband beamformers and also to some other related problems such as the unimodular radar waveform design (code design) problem.

Subject Keywords

Signal Processing, Electrical and Electronic Engineering

URI

https://hdl.handle.net/11511/45119

Journal

DIGITAL SIGNAL PROCESSING

DOI

https://doi.org/10.1016/j.dsp.2020.102674

Collections

Department of Electrical and Electronics Engineering, Article

Suggestions

OpenMETU
Core

Adaptive controller based on grid impedance estimation for stable operation of grid-connected inverters under weak grid conditions Temiz, Hakan; Keysan, Ozan; Demirok, Erhan (Institution of Engineering and Technology (IET), 2020-10-01) An electric grid having high impedance seen from the connection point is considered as a weak grid and it adversely affects the system stability of grid-tied voltage source inverters in renewable power devices. In this study, an adaptive controller is proposed by configuring the settling time of the phase-locked loop based on the estimated grid impedance. Pseudorandom binary sequence injection and Fourier techniques are carried out for grid impedance estimation. Impedance-based stability analysis is perform...
Tracker-aware adaptive detection: An efficient closed-form solution for the Neyman-Pearson case Aslan, Murat Samil; Saranlı, Afşar; Baykal, Buyurman (Elsevier BV, 2010-09-01) A promising line of research for radar systems attempts to optimize the detector thresholds so as to maximize the overall performance of a radar detector-tracker pair. In the present work, we attempt to move in a direction to fulfill this promise by considering a particular dynamic optimization scheme which relies on a non-simulation performance prediction (NSPP) methodology for the probabilistic data association filter (PDAF), namely, the modified Riccati equation (MRE). By using a suitable functional appr...
Continuation power flow and voltage stability in power systems Keskin, Mehmet B; Ertaş, Arif; Department of Electrical and Electronics Engineering (2007) This thesis investigates an important power system phenomenon, voltage stability, by using continuation power flow method. Voltage collapse scenario is presented which can be a serious result of voltage instability and the parameters that affect voltage collapse are discussed. In analyzing power system voltage stability, continuation power flow method is utilized which consists of successive load flows. This method is applied to a sample test system and Turkish Power System and load-voltage curves for sever...
Joint spatial and temporal channel-shortening techniques for frequency selective fading MIMO channels Toker, Canan; Chambers, JA; Baykal, Buyurman (2005-02-01) It is well understood that the maximum likelihood estimator is a powerful equalisation technique for frequency selective fading channels, and in particular for MIMO systems. The complexity of this estimator, however, grows exponentially with the number of users and multipath taps, hence limiting the use of this algorithm in MIMO systems. In the paper, the authors propose a joint spatial and temporal channel-shortening filter as a pre-processor to reduce significantly the complexity of a maximum likelihood e...
Inductor Saturation Compensation With Resistive Decoupling for Single-Phase Controlled VSC Systems ÖZKAN, ZİYA; Hava, Ahmet Masum (Institute of Electrical and Electronics Engineers (IEEE), 2020-02-01) In voltage-source converter systems, utilization of filter inductors with deep saturation characteristics is often advantageous because of the improved size, cost, and efficiency. However, with the use of conventional current regulation methods, the inductor saturation results in significant dynamic performance loss and poor steady-state current waveform quality. This paper proposes the saturation compensation with resistive decoupling (SCRD) method to overcome these performance issues. The method converts ...

Citation Formats

Ö. Çayır and Ç. Candan, “Transmit beamformer design with a PAPR constraint to trade-off between beampattern shape and power efficiency,” DIGITAL SIGNAL PROCESSING, pp. 0–0, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/45119.