Multiuser Cooperative Relay Communication Employing Hierarchical Modulation
| Autor: | Een-Kee Hong, Roderick Jaehoon Whang, Huaping Liu |
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| Rok vydání: | 2010 |
| Předmět: |
Scheme (programming language)
Computer science Reliability (computer networking) ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Hierarchical modulation Throughput Data_CODINGANDINFORMATIONTHEORY law.invention Transmission (telecommunications) Modulation Relay law Computer Science::Networking and Internet Architecture Electronic engineering Fading computer Computer Science::Information Theory computer.programming_language |
| Zdroj: | VTC Spring |
| DOI: | 10.1109/vetecs.2010.5493864 |
| Popis: | We develop a scheme to improve data throughput for multiuser cooperative relay communications operating in half-duplex mode. Cooperative relay, while effective in mitigating fading effects, might reduce the overall throughput of the network since it requires additionally resources for relay. In order to overcome this limitation, we develop a multiuser cooperative communication scheme that employs hierarchical modulation. This scheme exploits the different fading conditions for each user and allows the system to transmit two independent data streams simultaneously. Since the bit-error rate of the proposed system is a function of the distance parameters of hierarchical modulation, transmission reliability can be controlled flexibly by varying the distance parameter. We derive the error-rate expressions of the proposed scheme and compare its symbol-error rate performance for specific distance parameters with that of conventional relay schemes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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