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whitepaper This paper studies multiuser orthogonal frequency division multiplexing (OFDM) system using adaptive subchannel and power allocation with partial channel information. Previous research on multiuser OFDM includes margin adaptive (MA) optimization...
[10 Apr 2008]
whitepaper Multiuser orthogonal frequency division multiplexing (MU-OFDM) is a promising technique for achieving high downlink capacities in future cellular and wireless LAN systems. The sum capacity of MU-OFDM is maximized when each subchannel is assigned to...
[10 Apr 2008]
whitepaper Much of the performance analysis on multiuser receivers for direct-sequence code division multiple-access (CDMA) systems is focused on worst case near-far scenarios. The user capacity of power-controlled networks with multiuser receivers are less...
[10 Apr 2008]
whitepaper Parallel interference cancellation (PIC) is a promising detection technique for code division multiple access (CDMA) systems. It has previously been shown that the weighted multi-stage PIC can be seen as an implementation of the steepest descent...
[10 Apr 2008]
whitepaper The detection strategy usually denoted optimal multiuser detection is equivalent to the solution of a (0, 1)-constrained maximum-likelihood (ML) problem, a problem which is known to be NP-hard. In contrast, the unconstrained ML problem can be...
[10 Apr 2008]
whitepaper However, if one is using Office Accounting in a multiuser environment, he or she may want to use the full version of Microsoft SQL Server that is available with Windows Small Business Server (Windows SBS) R2.
[03 Apr 2008]
whitepaper This paper proposes the cooperative resource allocation over multiuser OFDM networks, by exploring the broadcast nature of the wireless channel and the consequently possible cooperation among users to improve the system performance.
[02 Apr 2008]
whitepaper By exploring frequency, time, and multiuser diversity in OFDM and flexibility of 3D embedded wavelet video codec, the proposed algorithm can achieve fair video qualities among all users. This paper proposes a system to transmit multiple 3-D...
[23 Jan 2008]
whitepaper As with any multiuser system, the user has to create accounts for users and assign them the proper privileges. This paper lays out the first administrative tasks the user needs to do and some ongoing administrative tools he or she will want to know...
[17 Oct 2007]
whitepaper The administrative tasks one will face are largely the same tasks one would face with any multiuser system. Now that one has a cluster, one is going to want to keep it running, which will involve a number of routine system administration tasks.
[10 Oct 2007]
whitepaper The administrative tasks one will face are largely the same tasks one would face with any multiuser system. Now that one has a cluster, one is going to want to keep it running, which will involve a number of routine system administration tasks.
[10 Oct 2007]
whitepaper For a wireless multi-antenna network with a large number of users, the sum capacity scales at most linearly with the number of antennas and double logarithmically the number of users. Achieving this optimal capacity scaling potentially requires...
[31 Aug 2007]
whitepaper This paper discusses how channel, source, and application-dependent concepts such as multiuser diversity, opportunistic and collaborative communications, loss-tolerance, and differing application-dependent delay constraints can be exploited to...
[23 Aug 2007]
whitepaper Multiuser spatial multiplexing uses precoding to support multiple users in multi-antenna wireless channels. In the other solution, a multiuser antenna selection algorithm is proposed that achieves good performance with fewer RF chains and lower...
[21 Aug 2007]
whitepaper Multiuser spatial multiplexing uses precoding to support multiple users in multi-antenna wireless channels. In the other solution, a multiuser antenna selection algorithm is proposed that achieves good performance with fewer RF chains and lower...
[21 Aug 2007]
whitepaper For a wireless multi-antenna network with a large number of users, the sum capacity scales at most linearly with the number of antennas and double logarithmically the number of users. Achieving this optimal capacity scaling potentially requires...
[10 Aug 2007]
whitepaper In this paper, a fair scheme to allocate subcarrier, rate, and power for multiuser OFDMA systems is proposed. The problem is to maximize the overall system rate, under each user's maximal power and minimal rate constraints, while considering the...
[01 Aug 2007]
whitepaper This paper proposes a Medium Access Diversity (MAD) scheme that leverages the benefits of rate adaptation schemes by aggressively exploiting multiuser diversity. Recent years have seen the growing popularity of multi-rate wireless network devices...
[01 Aug 2007]
whitepaper The paper focuses on low-cost transmit-only SNs; the resulting uncoordinated multiuser-access causes packet collisions. The authors are interested in designing a low-cost, Ultra-Wide-Band (UWB) sensor network that consists of a large number of...
[31 May 2007]
whitepaper The proposed method's usefulness is demonstrated by applying it to a multiuser OFDM system. Wireless channels change due to the mobility of users, which coupled with system delays, causes outdated Channel State Information (CSI) to be used for...
[26 Apr 2007]
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