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Decoding for MIMO Systems with Imperfect Channel State Information
2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010We consider robust receiver design in uncoded multiple-input multiple-output (MIMO) wireless communication systems. In practical systems, the channel state information (CSI) available at the receiver is often imperfect due to measurement errors, quantization errors and many other sources of errors. Consequently, using the erroneous CSI for decoding the
Boon Sim Thian, Andrea J. Goldsmith
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Interference alignment with imperfect channel state information at the transmitter
2012 International Symposium on Wireless Communication Systems (ISWCS), 2012A novel interference alignment (IA) algorithm is presented. IA solutions can be obtained in closed-form for special cases only. In general, iterative algorithms need to be used. Most of these algorithms are based on a joint design of precoders at the transmitter side and receive filters at the receiver side, while the proposed method achieves IA with a
Samer Bazzi +2 more
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Optimal Wireless Communications With Imperfect Channel State Information
IEEE Transactions on Signal Processing, 2013This paper studies optimal transmission over wireless channels with imperfect channel state information available at the transmitter side in the context of point-to-point channels, multiuser orthogonal frequency division multiplexing, and random access. Terminals adapt transmitted power and coding mode to channel estimates in order to maximize expected
Yichuan Hu, Alejandro Ribeiro
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MISO Secure Transmission with Imperfect Channel State Information
2017 IEEE 86th Vehicular Technology Conference (VTC-Fall), 2017In this paper, we study artificial noise (AN) assisted beamforming secure transmission system with imperfect main channel state information (CSI) between a friendly cooperative jammer (Oscar) and an authorized receiver (Bob). We deduce out the maximum secrecy rate of secure system and the corresponding optimal power allocation ratio between information
Huanhuan Song 0001 +4 more
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Block turbo equalization for imperfect channel state information
Proceedings. International Symposium on Information Theory, 2005. ISIT 2005., 2005We propose a soft-input soft-output block equalizer based on constrained minimum variance filters. In contrast to other schemes, our receiver is designed for imperfect channel state information and incorporates the statistics of the channel estimation error.
Markus A. Dangl +2 more
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Iterative Sphere Detectors for Imperfect Channel State Information
IEEE Transactions on Communications, 2011This manuscript presents an iterative detector based on a generalized Schnorr-Euchner enumeration for the case of imperfect channel state information. The detector determines the most contributive N∈{1,2} terms in each of the two log-sum-exponents. The objective function of the tree search is modified to account for (a) the channel estimation error ...
Michael Samuel, Michael P. Fitz
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Joint Transmission with Imperfect Partial Channel State Information
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, 2009The knowledge of the impact of imperfect channel state information (CSI) on data transmission techniques is helpful to improve the performance of wireless communication systems. In this paper, based on the proposed cooperative downlink (DL) transmission scheme applying adaptive scheduling of mobile stations (MSs), significant channel selection, and ...
Xinning Wei +3 more
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Optimal Transmission over a Fading Channel with Imperfect Channel State Information
2011 IEEE Global Telecommunications Conference - GLOBECOM 2011, 2011This paper considers a wireless channel when the probability distribution of fading is unknown and the transmitter has access to imperfect channel state information (CSI). Transmitted power and coding mode are adapted to the available imperfect CSI through the use of a backoff function in order to maximize the expected transmission rate subject to an ...
Yichuan Hu, Alejandro Ribeiro
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On the secrecy capacity of the broadcast wiretap channel with imperfect channel state information
2014 IEEE Global Communications Conference, 2014In this paper, we consider secure broadcasting over fast fading channels. Assuming imperfect main channel state information (CSI) at the transmitter, we first provide an upper and a lower bounds on the ergodic secrecy capacity when a common message is broadcasted to multiple legitimate receivers in the presence of one eavesdropper.
Amal Hyadi +3 more
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Beamforming for MIMO Gaussian wiretap channels with imperfect channel state information
2013 IEEE Global Communications Conference (GLOBECOM), 2013In this paper, we propose a new beamforming scheme for multi-input multi-output (MIMO) Gaussian wiretap channels where the channel state information (CSI) from the eavesdropper is imperfectly known to the transmitter. A stochastic model is constructed to characterize the imperfect CSI of the eavesdropper, in which a factor 0 ≤ τ ≤ 1 is introduced to ...
Chenxi Liu 0002 +4 more
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