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Showing 1 to 12 of 12 for “"Cooperative diversity"”.
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Intelligent antenna sharing in cooperative diversity wireless networks
Cooperative diversity has been recently proposed as a way to form virtual antenna arrays that provide dramatic gains in slow fading wireless environments. However, most of the proposed solutions require simultaneous relay transmissions at the same frequency bands, using distributed space-time …
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Cooperative diversity in wireless networks : algorithms and architectures
… greater benefits gained by exploiting spatial diversity in the channel. By contrast, classical network architectures only employ point-to-point transmission and thus forego these benefits. After summarizing a model for the wireless channel, we present various practical cooperative diversity …
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Cooperative diversity aided direct-sequence code-division multiple-access systems
… from the relays are detected based on a range of diversity combining schemes having a relatively low-complexity. Specifically, the maximal ratio combining (MRC), the maximum signal-to-interference-plus-noise ratio (MSINR) and the minimum mean-square error (MMSE) principles are considered.<br/>We …
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Performance Analysis of Decode-and-Forward Protocols in Unidirectional and Bidirectional Cooperative Diversity Networks
Cooperative communications have the ability to induce spatial diversity, increase channel capacity, and attain broader cell coverage with single-antenna terminals. This thesis focuses on the performance study of both unidirectional and bidirectional cooperative diversity networks employing the …
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Adaptive Relay-Selection In Decode-And-Forward Cooperative Systems
In the past few years adaptive decode-and-forward cooperative diversity systems have been studied intensively in literature. Many schemes and protocols have been proposed to enhance the performance of the cooperative systems while trying to alleviate its drawbacks. One of the recent schemes that …
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Communication Strategies for Single-User and Multiuser Slow Fading Channels
… communication systems with the advent of the diversity concept. Spatial diversity exploits the availability of multiple spatial paths between the transmitter and receiver by placing antenna arrays at either end. In addition to improving the reliability of communication by creating redundant …
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Communications over fading channels with partial channel information : performance and design criteria
… are examined for amplify-and-forward cooperative relaying schemes in Rayleigh fading channels. Simple power allocation strategies are determined by using knowledge of the mean strengths of the channels. Suboptimal algorithms are proposed for cases that optimal receivers are difficult …
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Node Selection, Synchronization and Power Allocation in Cooperative Wireless Networks
… communications: bandwidth and power. In turn, cooperative communications has emerged as a new communication paradigm in which network nodes share their antennas and transmission resources for distributed data exchange and processing. Recent studies have shown that cooperative communications can …
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Cooperative communication and distributed detection in wireless sensor networks
… to receive the data reliably. It is proposed a cooperative diversity concept as an effective solution to the reachback problem. In particular, it is considered a spread spectrum (SS) transmission scheme in conjunction with a fusion center that can exploit cooperative diversity, without requiring …
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Cooperative Detection and Network Coding in Wireless Networks
In cooperative communication systems, multiple terminals in wireless networks share their antennas and resources for information exchange and processing. Recently, cooperative communications have been shown to achieve significant performance improvements in terms of transmission reliability, …
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Backpressure networks with cooperative link augmentation
Made available in DSpace on 2017-03-01T16:37:08Z (GMT). No. of bitstreams: 2 LEE-THESIS-2016.pdf: 886931 bytes, checksum: 861a01b978b7a8909d863c93388cc960 (MD5) LICENSE.txt: 4208 bytes, checksum: 751f13872c59aa3d2ae5fe4a3cade338 (MD5) Previous issue date: 2016-12-07
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Low-complexity near-optimum detection techniques for non-cooperative and cooperative MIMO systems
… and complexity in the context of uncoded non-cooperative Multiple-Input Multiple-Output (MIMO) systems using coherent detection. Particular attention is devoted to Spatial Division Multiple Accessing (SDMA) aided Orthogonal Frequency Division Multiplexing (OFDM) systems, which are considered …