An Efficient beam and channel acquisition via sparsity map and joint angle-delay power profile estimation for wideband massive MIMO systems

Download

index.pdf

Date

2019

Author

Kalaycı, Ali Osman

Metadata

Show full item record

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

Item Usage Stats

199
views

111
downloads

In this thesis, an efficient beam and instantaneous channel acquisition scheme together with joint angle-delay power profile (JADPP), scatter map, construction are proposed for single-carrier (SC) mm-wave wideband sparse massive multiple-input multiple-output (MIMO) channels when hybrid beamforming architecture is utilized. We consider two different modes of operation, namely slow-time beam acquisition and fast-time instantaneous channel estimation, in training stage of time division duplex (TDD) based systems. In the first mode, where pre-structured hybrid beams are formed to scan intended angular sectors, the joint angle-delay sparsity map together with power intensities of each user channels are obtained by using a novel two-stage constant false alarm rate (CFAR) thresholding algorithm inspired from adaptive radar detection theory. The proposed thresholding algorithm employs a spatio-temporal adaptive matched filter (AMF) type estimator, taking the strong interference due to simultaneously active multipath components (MPCs) of different user channels into account, in order to estimate JADPP of each user. After applying the proposed thresholding algorithm on the estimated power profile, the angle-delay sparsity map of the massive MIMO channel is constructed, based on which the channel covariance matrices (CCMs) are formed with significantly reduced amount of training snapshots. Then, by using the estimated CCMs, the analog beamformer is reconstructed by means of a virtual sectorization (user-grouping via second-order channel statistics) while taking the inter-group and inter-symbol interference (ISI) into account. Finally, for the second mode of the training stage, two novel reduced rank instantaneous channel estimators, operating in a proper beamspace formed by the hybrid structure, are proposed. The proposed techniques attains the channel estimation accuracy of minimum mean square error (MMSE) filter with true knowledge of CCMs while reducing the training overhead considerably (compared to the conventional least-square (LS) type estimators).

Subject Keywords

MIMO systems., Keywords: Massive MIMO, multipath channel, single-carrier, wideband channel, millimeter wave, angle-delay channel sparsity, CFAR thresholding, adaptive matched filter, user-grouping, hybrid beamforming, channel estimation, reduced rank MMSE estimator, beamspace aware estimator, least square estimator isual-Inertial Odometry, Multi-State Constraint Kalman Filter, Vision-Aided Inertial Navigation, Autonomous Navigation.

URI

http://etd.lib.metu.edu.tr/upload/12623951/index.pdf
https://hdl.handle.net/11511/44828

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

A General framework on adaptive hybrid beamformingand channel acquisition for wideband mm-wave massive MIMO systems Kurt, Anıl; Güvensen, Gökhan Muzzaffer.; Department of Electrical and Electronics Engineering (2019) In this thesis, an efficient hybrid beamforming architecture together with a novel spatio-temporal receiver processing is proposed for single-carrier (SC) mm-wave wideband massive MIMO channels in time-domain duplex (TDD) mode. The design of two-stage beamformer is realized by using a virtual sectorization via second-order channel statistics based user grouping. The novel feature of the proposed architecture is that the effect of both inter-group-interference (due to non-orthogonality of virtual angular sec...
An Efficient Hybrid Beamforming and Channel Acquisition for Wideband mm-Wave Massive MIMO Channels Kurt, Anıl; Güvensen, Gökhan Muzaffer (2019-01-01) In this paper, an efficient hybrid beamforming architecture together with a novel spatio-temporal receiver processing is proposed for single-carrier (SC) mm-wave wideband massive MIMO channels in time-domain duplex (TDD) mode. The design of two-stage beamformers is realized by using a virtual sectorization via second-order channel statistics based user grouping. The novel feature of the proposed architecture is that the effect of both inter-group-interference (due to non-orthogonality of virtual angular sec...
An efficient spatial channel covariance estimation via joint angle-delay power profile in hybrid massive MIMO systems Kalayci, Ali Osman; Güvensen, Gökhan Muzaffer (2020-06-01) © 2020 IEEE.In this paper, an efficient construction method for channel covariance matrices (CCMs) together with joint angle-delay power profile (JADPP) and sparsity map estimation is proposed for single-carrier (SC) mm-wave wideband massive multiple-input multiple-output (MIMO) channels when hybrid beamforming architecture is utilized. We consider slow-time beam acquisition mode for training stage of time division duplex (TDD) based systems where pre-structured hybrid beams are formed to scan intended angu...
A Reduced complexity hybrid precoding architecture and user grouping algorithms for downlink wideband massive MIMO channels Kilcioğlu, Emre; Güvensen, Gökhan Muzaffer; Department of Electrical and Electronics Engineering (2019) In this thesis, an efficient hybrid precoding architecture is proposed for single-carrier (SC) downlink wideband spatially correlated massive multiple-input multiple-output (MIMO) channels. The design of two-stage beamformers is realized by using a virtual sectorization via second-order channel statistics based user grouping. The novel feature of the proposed architecture is that the effect of both inter-group-interference (due to non-orthogonality of virtual angular sectors) and the inter-symbol-interferen...
On Miniaturization and Performance Improvement of Planar Wideband Bandpass Filters Without Coupled Lines Alicioglu, Bulent; Yıldırım, Nevzat (2009-10-01) Two classical approaches are compared in various respects for the design of wideband planar BPF's without parallel coupled lines, namely, BPF's designed by pole placement with contributing Unit Elements (UE) and inverter coupled resonator filters designed from LP prototypes. It is shown that the circuit obtained by direct BP synthesis is a special case of inverter coupled filter with inverters converted into single Unit Elements. It is also shown that if the inverters are converted into odd number of UE's t...

Citation Formats

A. O. Kalaycı, “An Efficient beam and channel acquisition via sparsity map and joint angle-delay power profile estimation for wideband massive MIMO systems,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Electrical and Electronics Engineering., Middle East Technical University, 2019.