Results 111 to 120 of about 238,680 (167)
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Turbo Multi-user Receiver for Asynchronous Multi-user OFDM Systems
Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005., 2006This paper proposes a low complexity turbo multi-user receiver for the coded asynchronous multi-user orthogonal frequency division multiplexing (OFDM) signal over multipath fading channels. While asynchronous multi-user multiplexing with antenna diversity accommodates high speed applications and achieves the high spectral efficiency in communication ...
Hyejung Jung, Michael D. Zoltowski
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Proceedings of the third ACM international workshop on Wireless network testbeds, experimental evaluation and characterization, 2008
This paper provides an overview of a real-time multi-user multiple-input multiple-output (MIMO) communication testbed designed for demonstration and assessment of real-world wireless communication aspects. The testbed is built on a modular hardware platform consisting of three different boards and incorporates a MIMO-OFDM-based physical (PHY) layer, an
Peter Luethi +5 more
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This paper provides an overview of a real-time multi-user multiple-input multiple-output (MIMO) communication testbed designed for demonstration and assessment of real-world wireless communication aspects. The testbed is built on a modular hardware platform consisting of three different boards and incorporates a MIMO-OFDM-based physical (PHY) layer, an
Peter Luethi +5 more
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Proceedings of the Eighth International Symposium on Signal Processing and Its Applications, 2005., 2006
Future wired and wireless communication system will employ multi-user detection techniques, however, at this moment there are only suboptimal solutions available because of the rather high complexity of optimal detectors. Quantum detection techniques promise efficient optimal solutions to this NP (non-polynomial) hard problem. In this paper, we propose
Sheng-mei Zhao, Baoyu Zheng
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Future wired and wireless communication system will employ multi-user detection techniques, however, at this moment there are only suboptimal solutions available because of the rather high complexity of optimal detectors. Quantum detection techniques promise efficient optimal solutions to this NP (non-polynomial) hard problem. In this paper, we propose
Sheng-mei Zhao, Baoyu Zheng
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Parallelism in a multi-user environment
Parallel Computing, 1991Vectorization reduces CPU time, whereas parallelization leads to a reduction of wall-clock time at the cost of more CPU cycles. Application programs will in general not be perfectly parallel. Therefore a static scheduling scheme for processor usage will lead to a waste of cycles. In contrast with this, dynamic allocation of processors will prevent CPUs
R. J. van der Pas, J. M. van Kats
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Proceedings 1998 International Conference on Image Processing. ICIP98 (Cat. No.98CB36269), 2002
Multi-screen projection systems are widely used in the field of virtual reality. Within the system bounded by screens, users can view the panoramic stereoscopic images projected onto the screens. In such an immersive environment, however, just one viewer can feel the natural depth sensation.
Takeshi Naemura +2 more
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Multi-screen projection systems are widely used in the field of virtual reality. Within the system bounded by screens, users can view the panoramic stereoscopic images projected onto the screens. In such an immersive environment, however, just one viewer can feel the natural depth sensation.
Takeshi Naemura +2 more
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Multi-User Interaction with Shadows
2013Recent mobile devices such as smart phones exhibit performance as good as desktop PCs, and can be used more intuitively than PCs by using fingers. On the other hand, the defect of such a device is its small size. Its display is just big enough for single user, but is too small for interaction of multi-users.
Tomomi Gotoh +3 more
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The Multi-user Security of Double Encryption
2017It is widely known that double encryption does not substantially increase the security of a block cipher. Indeed, the classical meet-in-the middle attack recovers the 2k-bit secret key at the cost of roughly \(2^k\) off-line enciphering operations, in addition to very few known plaintext-ciphertext pairs.
Viet Tung Hoang, Stefano Tessaro
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Blind near-MAP selection diversity with multi-user detection for multi-user OFDM
2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733), 2004In this paper, a receiver algorithm for OFDM with receiver diversity is proposed. The proposed receiver uses a new multi-user generalization of the maximum a posteriori probability (MAP) selection diversity combining followed by successive interference cancellation with least-square projection for multi-user detection.
Cheng, Yu-Yi, Lee, Yumin, Li, Hsueh-Jyh
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2017
Hitherto, we have considered only a network of two users: signer/confirmer in case of confirmer signatures, and sender/receiver in the signcryption case. This setting is too simplistic to represent reality, where it is customary to have a network of many users that want to exchange signcrypted messages.
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Hitherto, we have considered only a network of two users: signer/confirmer in case of confirmer signatures, and sender/receiver in the signcryption case. This setting is too simplistic to represent reality, where it is customary to have a network of many users that want to exchange signcrypted messages.
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A Multi-Model Approach for User Portrait
Future Internet, 2021Jingsha He, Nafei Zhu, Yanbo Chen
exaly