An improved variable step-size affine projection algorithm for narrowband interference suppression in DSSS systems

Author

Lai Ping ; Ruimin Lu

Author_Institution

Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China

fYear

2013

fDate

15-18 July 2013

Firstpage

2043

Lastpage

2046

Abstract

In this paper, an improved Variable Step-Size Affine Projection Algorithm (VS-APA) is used in adaptive filters for narrowband interference suppression of direct sequence spectrum spreading (DSSS). Compared with traditional VS-APA and NLMS, this algorithm uses exponential function to vary the step-size, which can estimate NBI more accurately and a better tradeoff between performance and complexity. Computer simulations are shown to verify the analyses and compare the performance of the proposed Narrow-band Interference (NBI) suppression scheme with traditional VS-APA and NLMS adaptive algorithm.

Keywords

adaptive filters; interference suppression; spread spectrum communication; DSSS systems; NLMS; NLMS adaptive algorithm; VS-APA; VS-APA adaptive algorithm; computer simulations; direct sequence spectrum spreading; improved variable step-size affine projection algorithm; narrowband interference suppression; Adaptive filters; Convergence; Finite impulse response filters; Projection algorithms; Smoothing methods; Spread spectrum communication; Vectors; DSSS; NLMS; VS-APA; adaptive filter; interference suppression;

fLanguage

English

Publisher

ieee

Conference_Titel

Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE), 2013 International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4799-1014-4

Type

conf

DOI

10.1109/QR2MSE.2013.6625984

Filename

6625984