Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)

An Improved Algorithm of Narrow-Band Interference Rejection Based on Time-Domain Adaptive Filtering in DSSS System

Authors
Rui-Jun WANG, Shi-Guang HAO, Shu-Yun LI, Sheng KE, Shuai WANG
Corresponding Author
Rui-Jun WANG
Available Online December 2016.
DOI
https://doi.org/10.2991/cnct-16.2017.55How to use a DOI?
Keywords
Direct sequence spread spectrum, Narrow-Band interference, Time- domain adaptive filter, Least-mean-square algorithm
Abstract

In Direct sequence spread spectrum (DSSS) communication system, the auto-correlation of Pseudo-Noise Code is weak while the auto-correlation of Narrow-Band Interference (NBI) is strong, so that the NBI is more predictable than the DSSS signal. The principle of time-domain anti-interference is the auto-correlation difference between DSSS signal and NBI. However, due to the existence of oversampling in the transmitter, the auto-correlation of DSSS signal increases significantly, and the difference of auto-correlation between DSSS signal and NBI will diminish. And then the traditional time-domain adaptive filter will introduce distortion to the DSSS signal in rejection of the NBI. In this paper, an improved time-domain adaptive filtering algorithm is proposed. This algorithm is based on the interpolating transversal filter and the Least-mean-square (LMS) algorithm for updating the weights adaptively. Its anti-interference ability gains about 10dB than the traditional adaptive filter under the situation of SNR/chip is greater than 50dB. Both theoretical analysis and simulations illustrate that the new algorithm has a stronger anti-interference ability and introduces less distortion to the signal under high SNR conditions. Meanwhile, it has similar performance with the traditional adaptive filter under low SNR conditions.

Copyright
© 2017, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

Volume Title
Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)
Series
Advances in Computer Science Research
Publication Date
December 2016
ISBN
978-94-6252-301-2
ISSN
2352-538X
DOI
https://doi.org/10.2991/cnct-16.2017.55How to use a DOI?
Copyright
© 2017, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Rui-Jun WANG
AU  - Shi-Guang HAO
AU  - Shu-Yun LI
AU  - Sheng KE
AU  - Shuai WANG
PY  - 2016/12
DA  - 2016/12
TI  - An Improved Algorithm of Narrow-Band Interference Rejection Based on Time-Domain Adaptive Filtering in DSSS System
BT  - Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)
PB  - Atlantis Press
SP  - 399
EP  - 407
SN  - 2352-538X
UR  - https://doi.org/10.2991/cnct-16.2017.55
DO  - https://doi.org/10.2991/cnct-16.2017.55
ID  - WANG2016/12
ER  -