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

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4 Author(s)
Shuai Wang ; Sch. of Inf. Sci.&Electron., Beijing Inst. of Technol., Beijing, China ; Jian-ping An ; Ai-hua Wang ; Xiang-yuan Bu

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.

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Signal Processing Letters, IEEE  (Volume:17 ,  Issue: 5 )