Integrated Energy Analysis of Error Correcting Codes and Modulation for Energy Efficient Wireless Sensor Nodes

被引：34

作者：

Chouhan, Sonali ^{[1
]}

Bose, Ranjan ^{[1
]}

Balakrishnan, M. ^{[2
]}

机构：

[1] Indian Inst Technol, Dept Elect Engn, New Delhi 110016, India

[2] Indian Inst Technol, Dept Comp Sci & Engn, New Delhi 110016, India

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2009年 / 8卷 / 10期

关键词：

Reed-Solomon codes; block codes; modulation; communication systems; energy management;

D O I：

10.1109/TWC.2009.090279

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Optimizing energy consumption is a key objective in designing wireless sensor nodes. It has been shown earlier [1] that the node energy is strongly influenced by the modulation and the error correcting code (ECC) used. The utility of using ECC from an energy perspective is determined by the energy saving due to the ECC coding gain vis-A-vis the energy overhead of "redundant" bits and of encoding/decoding computation. Furthermore, the node energy varies with the change in error-correcting capability and code word length of a particular ECC as well as the modulation constellation size. The ECC coding gain is influenced by the constellation size. In this paper, the node energy variations with ECC and modulation parameters are analyzed for an energy optimal node design for the nodes operating in the additive white Gaussian noise channel. Based on this analysis, we compute the per information bit node energy and this is used to select an "optimal" ECC and modulation scheme pair. Our results show that the energy optimal ECC-modulation pair selected for some specific operating conditions could save as much as 50% energy. In nutshell, our work is targeted towards reducing the search space and finding an energy optimal ECC-modulation pair for the given environment and application.

引用

页码：5348 / 5355

页数：8

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