Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Vehkaperä, Mikko"'
Autor:
Khabbazibasmenj, Arash, Girnyk, Maksym A., Vorobyov, Sergiy A., Vehkaperä, Mikko, Rasmussen, Lars K.
Publikováno v:
In Proc. 10th Int. Symp. Wireless Commun. Syst. (ISWCS), pp. 1-4, 2013
We consider the problem of finding secrecy rate of a multiple-input multiple-output (MIMO) wire-tap channel. A transmitter, a legitimate receiver, and an eavesdropper are all equipped with multiple antennas. The channel states from the transmitter to
Externí odkaz:
http://arxiv.org/abs/1411.0103
Publikováno v:
Lecture Notes in Computer Science 8317, pp. 90-102, 2014
With the growth of wireless networks, security has become a fundamental issue in wireless communications due to the broadcast nature of these networks. In this work, we consider MIMO wiretap channels in a fast fading environment, for which the overal
Externí odkaz:
http://arxiv.org/abs/1411.0114
The present paper studies the asymptotic performance of multi-hop amplify-and-forward relay multiple-antenna communication channels. Each multi-antenna terminal in the network amplifies the received signal, sent by a source, and retransmits it upstre
Externí odkaz:
http://arxiv.org/abs/1410.5716
Autor:
Chatterjee, Saikat, Koslicki, David, Dong, Siyuan, Innocenti, Nicolas, Cheng, Lu, Lan, Yueheng, Vehkaperä, Mikko, Skoglund, Mikael, Rasmussen, Lars K., Aurell, Erik, Corander, Jukka
Motivation: Estimation of bacterial community composition from a high-throughput sequenced sample is an important task in metagenomics applications. Since the sample sequence data typically harbors reads of variable lengths and different levels of bi
Externí odkaz:
http://arxiv.org/abs/1407.0387
Autor:
Vehkaperä, Mikko, Riihonen, Taneli, Girnyk, Maksym A., Björnson, Emil, Debbah, Mérouane, Rasmussen, Lars K., Wichman, Risto
Hardware impairments in radio-frequency components of a wireless system cause unavoidable distortions to transmission that are not captured by the conventional linear channel model. In this paper, a 'binoisy' single-user multiple-input multiple-outpu
Externí odkaz:
http://arxiv.org/abs/1406.4980
Publikováno v:
IEEE J. Sel. Topics Signal Process., vol.8, no.5, pp. 773-786, 2014
A subspace projection to improve channel estimation in massive multi-antenna systems is proposed and analyzed. Together with power-controlled hand-off, it can mitigate the pilot contamination problem without the need for coordination among cells. The
Externí odkaz:
http://arxiv.org/abs/1309.6806
Presence of multiple antennas on both sides of a communication channel promises significant improvements in system throughput and power efficiency. In effect, a new class of large multiple-input multiple-output (MIMO) communication systems has recent
Externí odkaz:
http://arxiv.org/abs/1305.4755
Suppose a linear model y = Hx + n, where inputs x, n are independent Gaussian mixtures. The problem is to design the transfer matrix H so as to minimize the mean square error (MSE) when estimating x from y. This problem has important applications, bu
Externí odkaz:
http://arxiv.org/abs/1210.4381
Minimum mean square error (MMSE) estimation of block sparse signals from noisy linear measurements is considered. Unlike in the standard compressive sensing setup where the non-zero entries of the signal are independently and uniformly distributed ac
Externí odkaz:
http://arxiv.org/abs/1204.5707
Autor:
Vehkaperä, Mikko, Kabashima, Yoshiyuki, Chatterjee, Saikat, Aurell, Erik, Skoglund, Mikael, Rasmussen, Lars
The sparse representation problem of recovering an N dimensional sparse vector x from M < N linear observations y = Dx given dictionary D is considered. The standard approach is to let the elements of the dictionary be independent and identically dis
Externí odkaz:
http://arxiv.org/abs/1204.4065