Dr Alexandr Kuzminsky
Publications
Highlights
A.M.Kuzminskiy, P.Xiao, R.Tafazolli, “Spectrum Sharing with Decentralized Occupation Control in Rule
Regulated Networks,” IEEE Transactions on Cognitive Communications and Networking, vol. 6, no. 2, pp. 281-
294, June 2019.
A.Kuzminskiy, P.Xiao, R.Tafazolli, “'Good Neighbor Distributed Beam Scheduling in Coexisting Multi-RAT
Networks,” in Proc. WCNC, Barcelona, Spain, Apr. 2018.
A.Kuzminskiy, Y.Abramovich, P.Xiao, R.Tafazolli, “'Spectrum sharing efficiency analysis in rule regulated
networks with decentralized occupation control,” in Proc. PIMRC, Valencia, Spain, Sept. 2016.
A.Kuzminskiy, Y.Abramovich, P.Xiao, R.Tafazolli, “Uniform expected likelihood solution for Interference
rejection combining regularization,” in Proc. ICASSP, Shanghai, China, March 2016.
In asynchronous (intermittent) interference scenarios, the content of co-channel interference sources over the data interval may be different from the interferers content over the training interval, typically with extra interference sources presented over the data interval. Under such conditions, conventional adaptive beamformer designed over the training interval may lose its efficiency when applied to the data interval. In this paper, we address the problem by 1) formulating a family of the second order statistics adaptive beamformers regularized by the covariance matrix estimated over the data interval; 2) proposing a maximum likelihood methodology for optimization of the combined (mixed) covariance matrix based on maximization of a product of a likelihood ratio that checks the accuracy of the recovered training signals and a likelihood ratio on equality of the eigenvalues in complementary to the signal subspace defined over the data interval; 3) demonstrating efficiency and robustness of the proposed solution as a linear adaptive beamformer and as an initialization for iterative beamformer with projections to the finite alphabet in different asynchronous interference scenarios comparing with the basic training and data based interference rejection combining receivers.
Decentralized joint transmit power and beam- forming selection for multiple antenna wireless ad hoc net- works operating in a multi-user interference environment is considered. An important feature of the considered environ- ment is that altering the transmit beamforming pattern at some node generally creates more signicant changes to in- terference scenarios for neighboring nodes than variation of the transmit power. Based on this premise, a good neighbor algorithm is formulated in the way that at the sensing node, a new beamformer is selected only if it needs less than the given portion of the transmit power required for the current beamformer. Otherwise, it keeps the current beamformer and achieves the performance target only by means of power adaptation. Equilibrium performance and convergence be- havior of the proposed algorithm compared to the best re- sponse and regret matching solutions is demonstrated by means of semi-analytic Markov chain performance analysis for small scale and simulations for large scale networks.
Decentralized dynamic spectrum allocation (DSA) that exploit adaptive antenna array interference mitigation (IM) diversity at the receiver, is studied for interference-limited environments with high level of frequency reuse. The system consists of base stations (BSs) that can optimize uplink frequency allocation to their user equipments (UEs) to minimize impact of interference on the useful signal, assuming no control over band allocation of other BSs sharing the same bands. To this end, “good neighbor” (GN) rules allow effective trade off between the equilibrium and transient decentralized DSA behavior if the performance targets are adequate to the interference scenario. In this paper, we extend the GN rules by including a spectrum occupation control that allows adaptive selection of the performance targets corresponding to the potentially “interference free” DSA; define the semi-analytic absorbing Markov chain model for the GN DSA with occupation control and study the convergence properties including effects of possible breaks of the GN rules; and for higher-dimension networks, develop the simplified search GN algorithms with occupation and power control (PC) and demonstrate their efficiency by means of simulations in the scenario with unlimited requested network occupation.
Decentralized dynamic spectrum allocation (DSA) that exploits adaptive antenna array interference mitigation diversity at the receiver, is studied for interference-limited environments with high level of frequency reuse. The system consists of base stations (BSs) that can optimize uplink frequency allocation to their user equipments (UEs) to minimize impact of interference on the useful signal, assuming no control over resource allocation of other BSs sharing the same bands. To this end“, good neighbor” (GN) rules allow effective trade-off between the equilibrium and transient decentralized DSA behavior if the performance targets are adequate to the interference scenario. In this paper, we 1) extend the GN rules by including a spectrum occupation control that allows adaptive selection of the performance targets; 2) derive estimates of absorbing state statistics that allow formulation of applicability areas for different DSA algorithms; 3) define a semi-analytic absorbing Markov chain model and study convergence probabilities and rates of DSA with occupation control including networks with possible partial breaks of the GN rules. For higher-dimension networks, we develop simplified search GN algorithms with occupation and power control and demonstrate their efficiency by means of simulations.
High mobility scenarios may be typical for different applications such as low earth orbit (LEO) satellite and vehicle-to-everything (V2X) communications. A standardized approach to dealing with high mobility scenarios is using flexible sub-frame structures including a higher pilot density in the time domain, which leads to reduced spectrum efficiency. We propose a supplementary algorithm to improve multiple antenna receiver performance in high mobility scenarios for the given sub-frame structure compared to the conventional 3GPP pilot and data based interference rejection receivers. The main feature of high mobility (non-stationary) scenarios is that different symbols in the desired signal sub-frame may be received under different propagation and/or interference conditions. Recently, we have addressed a non-stationary interference rejection scenario in slowly varying propagation environment with asynchronous (intermittent) interference by means of developing an interference rejection combining algorithm, where the pilot based estimate of the interference plus noise covariance matrix is regularized by the data based estimate of the covariance matrix. In this paper, we: 1) extend the data regularized solution to the general high mobility scenarios, and 2) demonstrate its efficiency compared to the conventional pilot and data based receivers for different sub-frame formats in the uplink transmissions in the LEO satellite scenario with high residual Doppler frequency with and without hardware impairments.
Spectrum sharing and employing highly directional antennas in the mm-wave bands are considered among the key enablers for 5G networks. Conventional interference avoidance techniques like listen-before-talk (LBT) may not be efficient for such coexisting networks. In this paper, we address a coexistence mechanism by means of distributed beam scheduling with minimum cooperation between spectrum sharing subsystems without any direct data exchange between them. We extend a “Good Neighbor” (GN) principle initially developed for decentralized spectrum allocation to the distributed beam scheduling problem. To do that, we introduce relative performance targets, develop a GN beam scheduling algorithm, and demonstrate its efficiency in terms of performance/complexity trade off compared to that of the conventional selfish (SLF) and recently proposed distributed learning scheduling (DLS) solutions by means of simulations in highly directional antenna mm-wave scenarios.
Additional publications
A.M.Kuzminskiy, Y.I.Abramovich, “Decentralized dynamic spectrum allocation based on adaptive antenna array
interference mitigation diversity,” IEEE Transactions on Signal Processing, vol. 58, no.4, pp. 2246-2260, Apr.
2010.
A.M.Kuzminskiy, Y.I.Abramovich, “Nonstationary multiple-antenna interference cancellation for
unsynchronized OFDM systems with distributed training,” Signal Processing, vol. 89, no. 5, pp. 753-764, May
2009.
A.M.Kuzminskiy, H.R.Karimi, “Multiple-antenna interference cancellation for WLAN with MAC interference
avoidance in open access networks,” EURASIP Journal on Wireless Communications and Networking (JWCN),
ID 51358, 2007.
A.M.Kuzminskiy, “Downlink beamforming subject to the equivalent isotropic radiated power constraint in
WLAN OFDM systems,” Signal Processing, vol. 87, no. 5, pp. 991-1002, 2007.
A.M.Kuzminskiy, Y.I.Abramovich, “Second-Order Asynchronous Interference Cancellation: Regularized Semi-
Blind Technique and Non-Asymptotic Maximum Likelihood Benchmark,” Signal Processing, vol. 86, no. 12,
pp. 3849-3863, Dec. 2006.
A.M.Kuzminskiy, F.J.Mullany, C.B.Papadias, “Steered-STS transmit antenna architecture with semi-blind
channel estimation at the receiver in CDMA2000,” IEEE Transactions on Vehicular Technologies, vol. 55, no. 5,
pp. 1671-1677, Sept. 2006.
A.M.Kuzminskiy, H.R.Karimi, D.Morgan, C.B.Papadias, D.Avidor, J.Ling, “Downlink throughput enhancement
of IEEE 802.11a/g using SDMA with a multi-antenna access point,” Signal Processing, Special Issue on
Advances in Signal Processing-assisted Cross-layer Designs, vol. 86, no. 8, pp. 1896-1910, Aug. 2006.
Y.I.Abramovich, A.M.Kuzminskiy, “On correspondence between training based and semi-blind second-order
adaptive techniques for mitigation of synchronous CCI,” IEEE Transactions on Signal Processing, vol. 54, no. 6,
pp. 2347-2351, June 2006.
A.M.Kuzminskiy, “Finite amount of data effects in spatio-temporal filtering for equalisation and interference
rejection in short burst wireless communications”, Signal Processing, vol. 80, no. 10, pp. 1987-1997, Oct. 2000.
A.M.Kuzminskiy, D.Hatzinakos, “Semi-blind spatio-temporal processing with temporal scanning for short burst
SDMA systems”, Signal Processing, vol. 80, no. 10, pp. 2063-2073, Oct. 2000.
A.M.Kuzminskiy, D.Hatzinakos, “Semi-blind estimation of spatio-temporal filter coefficients based on a
training-like approach”, IEEE Signal Processing Letters, vol.5, n.9, pp.231-233, Sept. 1998.
A.Kuzminskiy, J.Yang, S-H.Wong, A.Rao, M.Baker, “Decentralized adaptive range expansion in heterogeneous
WCDMA networks,” in Proc. PIMRC, London, Sept. 2013.
A.Kuzminskiy, Y.Abramovich, “Decentralized “good neighbor" DSA based on adaptive antenna array
interference mitigation diversity: Finite amount of data effects,” in Proc. CrownCom, Cannes, June 2010.
A.Kuzminskiy, Y.Abramovich, “Rule-breaks effect on decentralized rule-regulated “good neighbor" DSA based
on adaptive antenna array interference mitigation diversity,” in Proc. DySpan, Singapore, April 2010.
A.Kuzminskiy, Y.Abramovich, “Randomized decentralized “good neighbor” DSA based on adaptive antenna
array interference mitigation diversity,” in Proc. ICASSP, Dallas, March 2010.
A.Kuzminskiy, Y.Abramovich, “DSA based on adaptive antenna array interference mitigation diversity:
algorithms and Markov chain analysis,” in Proc. IEEE ICASSP, Taipei, Apr. 2009.
A.Kuzminskiy, Y.Abramovich, “Adaptive antenna array interference mitigation diversity for decentralized DSA
in license-exempt spectrum,” in Proc. ICC, Dresden, June 2009.
Y.Abramovich, A.Kuzminskiy, “Performance bounds for dynamic spectrum allocation based on adaptive antenna
array interference mitigation diversity,” in Proc. IEEE Statistical Signal Processing Workshop, Cardiff, Sept.
2009.
A.M.Kuzminskiy, Y.I.Abramovich, “Nonstationary multiple-antenna interference cancellation for
unsynchronized OFDM systems,” in Proc. IEEE ICASSP, Las Vegas, April 2008.
A.M.Kuzminskiy, H.R.Karimi, “Cross-layer design of uplink multiple-antenna interference cancellation for
WLAN with CSMA/CA in open access networks,” in Proc. ICC, Glasgow, June 2007.
A.M.Kuzminskiy, Y.I.Abramovich, “Interval-based maximum likelihood benchmark for adaptive second-order
asynchronous CCI cancellation,” in Proc. ICASSP, Honolulu, Apr. 2007.
A.M.Kuzminskiy, “Downlink beamforming under EIRP constraint in WLAN OFDM systems,” in Proc.
EUSIPCO, Florence, Sept. 2006.
A.M.Kuzminskiy, “EIRP-restricted downlink beamforming in WLAN OFDM systems,” in Proc. SPAWC,
Cannes, July 2006.