A Minimum Value Based Threshold Setting Strategy for Frequency Domain Interference Excision

Author

Wang, Shuai ; An, Jian-ping ; Wang, Ai-hua ; Bu, Xiang-yuan

Author_Institution

Sch. of Inf. Sci.&Electron., Beijing Inst. of Technol., Beijing, China

Volume

17

Issue

5

fYear

2010

fDate

5/1/2010 12:00:00 AM

Firstpage

501

Lastpage

504

Abstract

We present a robust threshold setting strategy with modest computational complexity for frequency domain interference excision in direct sequence spread-spectrum (DSSS) communication systems. The proposed strategy calculates the threshold by multiplying the minimum value of the averaged squared magnitude with a predefined scaling factor. An analytical framework for choosing the scaling factor is developed based on the principle of constant false-alarm rate (CFAR). Numerical results indicate that the new strategy outperforms existing ones in a wide range of partial-band jamming scenarios.

Keywords

computational complexity; interference (signal); jamming; spread spectrum communication; averaged squared magnitude; computational complexity; constant false-alarm rate; direct sequence spread-spectrum communication systems; frequency domain interference excision; partial-band jamming; predefined scaling factor; threshold setting strategy; DSSS; FFT; interference excision; threshold;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2009.2035414

Filename

5299226