Joint Linear Receiver Design and Power Allocation Using Alternating Optimization Algorithms for Wireless Sensor Networks

In this paper, we consider a two-hop wireless sensor network (WSN) with multiple relay nodes where the amplify-and-forward (AF) scheme is employed. We present strategies to design jointly linear receivers and the power-allocation parameters via an alternating optimization approach subject to global,...

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Vydáno v:	IEEE transactions on vehicular technology Ročník 61; číslo 9; s. 4129 - 4141
Hlavní autoři:	Wang, T., de Lamare, R. C., Schmeink, A.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York, NY IEEE 01.11.2012 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:	Access methods and protocols, osi model Allocations Amplification Applied sciences Connection and protection apparatus Constraints Criteria Electrical engineering. Electrical power engineering Exact sciences and technology Information systems Linear receivers Maximum sum-rate (MSR) criterion minimum mean square error (MMSE) criterion Neodymium Networks Optimization power allocation Radiocommunications Receivers Relays Resource management Sensors Services and terminals of telecommunications Studies Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Telemetry. Remote supervision. Telewarning. Remote control Teleprocessing networks. Isdn Transmitters. Receivers Vectors Wireless sensor networks wireless sensor networks (WSNs) Performance evaluation Maximum sum-rate (MSR) criterion Relay Bit error rate Wireless telecommunication Feedback regulation Power allocation Flexibility Optimization Remote sensing Mean square error Feedback Routing protocols Multistage circuit Signal detection Multistage method Computer simulation minimum mean square error (MMSE) criterion wireless sensor networks (WSNs) Transmission protocol Durability Receiver Algorithm Computational complexity Wireless network Reliability Sensor array Comparative study
ISSN:	0018-9545, 1939-9359
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Shrnutí:	In this paper, we consider a two-hop wireless sensor network (WSN) with multiple relay nodes where the amplify-and-forward (AF) scheme is employed. We present strategies to design jointly linear receivers and the power-allocation parameters via an alternating optimization approach subject to global, individual, and neighbor-based power constraints. Two design criteria are considered: The first criterion minimizes the mean-square error (MSE), and the second criterion maximizes the sum-rate (SR) of the WSN. We derive constrained minimum mean-square error (MMSE) and constrained maximum sum-rate (MSR) expressions for the linear receivers and the power-allocation parameters that contain the optimal complex amplification coefficients for each relay node. Computer simulations show good performance of our proposed methods in terms of bit error rate (BER) or SR compared with the method with equal power allocation and to a two-stage power-allocation technique. Furthermore, the methods with neighbor-based constraints bring flexibility to balance the performance against the computational complexity and the need for feedback information, which is desirable for WSNs to extend their lifetime.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 ObjectType-Article-2 ObjectType-Feature-1 content type line 23
ISSN:	0018-9545 1939-9359
DOI:	10.1109/TVT.2012.2212217