Interference Mitigation With Selective Retransmissions In Wireless Sensor Networks

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Interference Mitigation With Selective Retransmissions In Wireless Sensor Networks

Interference Mitigation With Selective Retransmissions In Wireless Sensor Networks written by Selig, Marc and has been published by kassel university press GmbH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

A wireless sensor network with single-antenna sensors on the transmitter side and an access point (AP) equipped with multiple antennas on the receiver side is considered. In order to reduce the number of outages resulting from the noise amplification by the linear reconstruction within the successive interference cancellation (SIC) procedure, the AP is given the possibility to request retransmissions of signals from selected sensors in a subsequent time slot (TS). In case retransmissions are needed also in the subsequent time slot, the AP postpones the signal detection until all requested signals have been retransmitted making the signal detection a recursive procedure. The number of sensors required to retransmit depends on the order of the processed sensor signals within the SIC procedure. We propose an optimal algorithm based on a QR-decomposition and a depth-first search through all possible decoding orders, which finds the decoding order necessitating a minimum number of retransmissions suitable for zero-forcing (ZF) and minimum mean square error (MMSE) linear reconstruction approaches. Since the computational complexity of the optimal algorithm is high, different suboptimal algorithms with lower computational complexity are proposed for the case of ZFSIC and MMSE-SIC, respectively. The recursive nature of the retransmission procedure may lead to an unlimited detection delay, because the linear reconstruction followed by SIC starts only when no sensor needs a retransmission from the previous TS. By reducing the number of transmitting sensors for a fixed number of receiving antennas the receive diversity of the AP can be exploited, which leads to less retransmissions. Therefore, we propose an optimal transmit policy, which selects the best set of sensors to maximize the system throughput. This optimal transmit policy is found by means of a Markov decision process in combination with dynamic programming.

Algorithms And Protocols For Wireless And Mobile Ad Hoc Networks

Algorithms And Protocols For Wireless And Mobile Ad Hoc Networks written by Azzedine Boukerche and has been published by Wiley-IEEE Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Computers categories.

Focuses on several aspects of wireless ad hoc networks, particularly algorithmic methods and distributed computing with mobility and computation capability. This book provides the crucial building foundation for the design and construction of the future generation of ad hoc networks.

Master S Theses And Doctoral Dissertations In The Pure And Applied Sciences

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Dissertation Abstracts International

Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Dissertations, Academic categories.

Science Abstracts

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Masters Theses And Doctoral Dissertations In The Pure And Applied Sciences Accepted By Colleges And Universities Of The United States

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Cognitive Interference Mitigation In Wireless Sensor Networks

Cognitive Interference Mitigation In Wireless Sensor Networks written by Ashish Mehta and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Wireless sensor networks categories.

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International Aerospace Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Aeronautics categories.

Canadian Aeronautics And Space Journal

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Dynamic Interference Mitigation In Wireless Sensor Networks

Dynamic Interference Mitigation In Wireless Sensor Networks written by Devyani Sharma and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Sensor networks categories.