Results 231 to 240 of about 31,845,692 (279)
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Adaptive OFDM Systems With Imperfect Channel State Information
IEEE Transactions on Wireless Communications, 2006Adaptive modulation has been shown to have significant benefits for high-speed wireless data transmission when orthogonal frequency division multiplexing (OFDM) is employed. However, accurate channel state information (CSI) is required at the transmitter to achieve the benefits.
Rick Blum, Leonard J Cimini
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On the low SNR capacity of MIMO fading channels with imperfect channel state information
2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt), 2014 The capacity of multiple-input multiple-output (MIMO) Rayleigh fading channels with full knowledge of channel state information (CSI) at both the transmitter and the receiver (CSI-TR) has been shown recently to scale at low signal-to-noise ratio (SNR) essentially as SNR log(1/SNR), independently of the number of transmit and receive antennas.
Fatma Benkhelifa +3 more
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16-QAM BICM-ID in fading channels with imperfect channel state information
IEEE Transactions on Wireless Communications, 2003We analyze the impact of imperfect channel state information (CSI) on the performance of bit-interleaved coded modulation with iterative decoding (BICM-ID) over fading channels. We develop a general, accurate and efficient theoretical error-free feedback bound (EF bound) to analyze the asymptotic bit-error rate (BER) of BICM-ID with imperfect CSI, and ...
J A Ritcey, Yuheng Huang
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Capacity Analysis of Bidirectional AF Relay Selection with Imperfect Channel State Information
IEEE Wireless Communications Letters, 2013 In this letter, we analyze the ergodic capacity of bidirectional amplify-and-forward relay selection network. The imperfect channel state information (CSI) is taken into account, which includes outdated CSI and channel estimation error, caused by the ...
Bingli Jiao +2 more
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On transmit diversity with imperfect channel state information
IEEE International Conference on Acoustics Speech and Signal Processing, 2002The optimal transmission strategy of a multiple-input single-output wireless communication link is studied in which the receiver has full channel state information and the transmitter has only long-term channel state information in terms of the channel covariance matrix.
Eduard A. Jorswieck, Holger Boche
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Cooperative Relaying with Imperfect Channel State Information
IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference, 2008We consider relay cooperation with imperfect channel state information (CSI) in the downlink of wireless networks. In particular, we consider a two-phase transmission where in the first phase the base station broadcasts information to the relays; the relays decode the data fully or partially depending on the transmission rate and the quality of their ...
George K. Atia, Andreas F. Molisch
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Imperfect channel-state information in MIMO transmission
IEEE Transactions on Communications, 2006A especially favorable multiple-input multiple-output (MIMO)-based concept for future mobile radio systems consists of the application of joint detection (JD) in the uplink and joint transmission (JT) in the downlink. By this, all the computational complex signal processing is shifted to the base station (BS), resulting in low-complexity mobile ...
Tobias Weber +2 more
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Optimal wireless multiuser channels with imperfect channel state information
2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2012This paper considers algorithms for optimal transmission over wireless multiuser channels where the transmitter has access to imperfect channel state information (CSI). We focus on downlink orthogonal frequency division multiple access and multiuser uplink random access.
Yichuan Hu, Alejandro Ribeiro
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Wireless MIMO Switching with Imperfect Channel State Information
2018 IEEE Global Communications Conference (GLOBECOM), 2018This paper investigates the transceiver design in a wireless multiple-input multiple-output (MIMO) switching network in which multiple users exchange messages via a multi-antenna relay. Previous work assumed that perfect channel state information (CSI) is known at the relay, which is intractable in practice.
Dong Wang 0032 +3 more
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MIMO Detection With Imperfect Channel State Information Using Expectation Propagation
IEEE Transactions on Vehicular Technology, 2017 Expectation propagation (EP) has been recently proposed as a low-complexity algorithm for symbol detection in massive MIMO systems, where its performance is evaluated on the premise that perfect channel state information (CSI) is available at the ...
Mort Naraghi-Pour
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