One-Bit Quantizer Design for Multisensor GLRT Fusion

Author

Jun Fang ; Yumeng Liu ; Hongbin Li ; Shaoqian Li

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

20

Issue

3

fYear

2013

fDate

Mar-13

Firstpage

257

Lastpage

260

Abstract

In this letter, we consider a decentralized detection problem in which a number of sensor nodes collaborate to detect the presence of an unknown deterministic signal. Due to stringent power/bandwidth constraints, each sensor quantizes its local observation into one bit of information. The binary data are then sent to the fusion center (FC), where a generalized likelihood ratio test (GLRT) detector is employed to make a global decision. In this context, we study one-bit quantizer design and analyze the asymptotic performance of the one-bit GLRT detector for cases where the quantized data are sent to the FC via perfect or imperfect channels. Simulation results are carried out to corroborate our theoretical analysis and to illustrate the performance of the proposed scheme.

Keywords

quantisation (signal); sensor fusion; signal detection; wireless sensor networks; binary data; fusion center; generalized likelihood ratio test detector; imperfect channel; multisensor GLRT fusion; quantizer design; Bandwidth; Detectors; Educational institutions; Maximum likelihood estimation; Probability density function; Quantization; Wireless sensor networks; Decentralized detection; one-bit quantization; wireless sensor networks (WSNs);

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2013.2243144

Filename

6422327