2 citations · 4 across the 11 of their papers we have counts for
12 papers
Closed-Form Least-Squares Design of Fast-Convolution Based Variable-Bandwidth FIR Filters
Oksana Moryakova, Håkan Johansson
This paper introduces a closed-form least-squares (LS) design approach for fast-convolution (FC) based variable-bandwidth (VBW) finite-impulse-response (FIR) filters. The proposed…
Efficient Computation of Time-Index Powered Weighted Sums Using Cascaded Accumulators
Deijany Rodriguez Linares, Oksana Moryakova, Håkan Johansson
This letter presents a novel approach for \mbox{efficiently} computing time-index powered weighted sums of the form using cascaded accumulators. Tradi…
Reconstruction of Complex Baseband Signals via M-Periodic Nonuniform Bandpass Sampling and Least-Squares Optimal Time-Varying FIR Filters
Hakan Johansson
This paper considers the reconstruction of digital complex baseband signals from M-periodically nonuniformly sampled real bandpass signals. With such a sampling, bandpass signals w…
Modeling, Analysis, and Optimization of Cascaded Power Amplifiers
Oksana Moryakova, Thomas Eriksson, Håkan Johansson
This paper deals with modeling, analysis, and optimization of power amplifiers (PAs) placed in a cascaded structure, particularly the effect of cascaded nonlinearities is studied b…
Joint Sampling Frequency Offset Estimation and Compensation Based on the Farrow Structure
Deijany Rodriguez Linares, Oksana Moryakova, Håkan Johansson
This paper introduces a sampling frequency offset (SFO) estimation method based on the Farrow structure, which is typically utilized for the SFO compensation and thereby enables a…
Digital Linearizer Based on 1-Bit Quantizations
Deijany Rodriguez Linares, Håkan Johansson
This paper introduces a novel low-complexity memoryless linearizer for suppression of distortion in analog frontends. It is based on our recently introduced linearizer which is ins…
Low-Complexity Frequency-Dependent Linearizers Based on Parallel Bias-Modulus and Bias-ReLU Operations
Deijany Rodriguez Linares, Håkan Johansson
This paper introduces low-complexity frequency-dependent (memory) linearizers designed to suppress nonlinear distortion in analog-to-digital interfaces. Two different linearizers a…
Efficient Design and Implementation of Fast-Convolution-Based Variable-Bandwidth Filters
Oksana Moryakova, Håkan Johansson
This paper introduces an efficient design approach for a fast-convolution-based variable-bandwidth (VBW) filter. The proposed approach is based on a hybrid of frequency sampling an…
Order Estimation of Linear-Phase FIR Filters for DAC Equalization in Multiple Nyquist Bands
Deijany Rodriguez Linares, Håkan Johansson, Yinan Wang
This letter considers the design of linear-phase finite-length impulse response (FIR) filters for equalization of the frequency responses of digital-to-analog converters (DACs). Th…
A General Approach to Fully Linearize the Power Amplifiers in mMIMO with Less Complexity
Ganesh Prasad, Håkan Johansson, Rabul Hussain Laskar
A radio frequency (RF) power amplifier (PA) plays an important role to amplify the message signal at higher power to transmit it to a distant receiver. Due to a typical nonlinear b…
A Low-Complexity Post-Weighting Predistorter in a mMIMO Transmitter Under Crosstalk
Ganesh Prasad, Håkan Johansson
The beam-oriented digital predistortion (BO-DPD) is not sufficient to linearize the output from a subarray of power amplifiers (PAs) in different directions except the desired dire…
SPSA-Based Successive Beamforming for Mobile Satellite Receivers with Phased Arrays
Zheng Chen, Håkan Johansson
Efficient and low-complexity beamforming design is an important element of satellite communication systems with mobile receivers equipped with phased arrays. In this work, we apply…