Adaptive Subband Transforms in Time-Frequency Excisers for DSSS Communications Systems

Mehmet V. Tazebay; Ali N. Akansu

doi:10.1109/78.482125

Adaptive Subband Transforms in Time-Frequency Excisers for DSSS Communications Systems

Mehmet V. Tazebay, Ali N. Akansu

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

A smart time-frequency exciser for DSSS communications is proposed in this correspondence. This technique utilizes the concept of uncertainty in time-frequency analysis of signals. It brings the novel concept of domain switchable signal processing. Hence, the adaptive time-frequency (ATF) exciser has the capability of deciding the domain of the interference cancellation. Additionally, adaptive subband transforms are utilized for frequency domain excision. For time-domain excision, the ATF excision algorithm utilizes a sliding time window to reject the nonstationary, pulsed (time-localized) interference. It is shown that the proposed adaptive time-frequency exciser-based DSSS communications receiver drastically outperforms the existing systems. Its performance is nearly optimal and very robust to the inter and intradomain variations of the undesired signal.

Original language	English (US)
Pages (from-to)	2776-2782
Number of pages	7
Journal	IEEE Transactions on Signal Processing
Volume	43
Issue number	11
DOIs	https://doi.org/10.1109/78.482125
State	Published - Nov 1995

All Science Journal Classification (ASJC) codes

Signal Processing
Electrical and Electronic Engineering

Access to Document

10.1109/78.482125

Cite this

@article{ac9dcef02b514bad8069eead0f1ea4a6,

title = "Adaptive Subband Transforms in Time-Frequency Excisers for DSSS Communications Systems",

abstract = "A smart time-frequency exciser for DSSS communications is proposed in this correspondence. This technique utilizes the concept of uncertainty in time-frequency analysis of signals. It brings the novel concept of domain switchable signal processing. Hence, the adaptive time-frequency (ATF) exciser has the capability of deciding the domain of the interference cancellation. Additionally, adaptive subband transforms are utilized for frequency domain excision. For time-domain excision, the ATF excision algorithm utilizes a sliding time window to reject the nonstationary, pulsed (time-localized) interference. It is shown that the proposed adaptive time-frequency exciser-based DSSS communications receiver drastically outperforms the existing systems. Its performance is nearly optimal and very robust to the inter and intradomain variations of the undesired signal.",

author = "Tazebay, {Mehmet V.} and Akansu, {Ali N.}",

note = "Funding Information: The data bit stream dl has a bit-to-bit duration of T d s. The PN spreading code has a chipping rate of T, s, where T d >> T,. Hence, the length of the PN code is obtained as K = 2. Without any interfering signal &, the transmitted DSSS signal has a flat spectrum. The receiver correlates the signal with a properly synchronized version of the spreading sequence c. The length-K PN spreading code has the energy cc' ~ ' ( 6 )= K. The decision variable is therefore obtained as Manuscript received August 4, 1994; revised March 28, 1995. This work was supported by GEC-Marconi. The associate editor coordinatingt he review of this paper and approving it for publication was Dr. Truong Q. Nguyen. The authors are with the Department of Electrical and Computer Engineering, Center for Communications and Signal Processing Research, New Jersey Institute of Technology, Newark, NJ 07102 USA. IEEE Log Number 9415089.",

year = "1995",

month = nov,

doi = "10.1109/78.482125",

language = "English (US)",

volume = "43",

pages = "2776--2782",

journal = "IEEE Transactions on Signal Processing",

issn = "1053-587X",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "11",

}

TY - JOUR

T1 - Adaptive Subband Transforms in Time-Frequency Excisers for DSSS Communications Systems

AU - Tazebay, Mehmet V.

AU - Akansu, Ali N.

N1 - Funding Information: The data bit stream dl has a bit-to-bit duration of T d s. The PN spreading code has a chipping rate of T, s, where T d >> T,. Hence, the length of the PN code is obtained as K = 2. Without any interfering signal &, the transmitted DSSS signal has a flat spectrum. The receiver correlates the signal with a properly synchronized version of the spreading sequence c. The length-K PN spreading code has the energy cc' ~ ' ( 6 )= K. The decision variable is therefore obtained as Manuscript received August 4, 1994; revised March 28, 1995. This work was supported by GEC-Marconi. The associate editor coordinatingt he review of this paper and approving it for publication was Dr. Truong Q. Nguyen. The authors are with the Department of Electrical and Computer Engineering, Center for Communications and Signal Processing Research, New Jersey Institute of Technology, Newark, NJ 07102 USA. IEEE Log Number 9415089.

PY - 1995/11

Y1 - 1995/11

N2 - A smart time-frequency exciser for DSSS communications is proposed in this correspondence. This technique utilizes the concept of uncertainty in time-frequency analysis of signals. It brings the novel concept of domain switchable signal processing. Hence, the adaptive time-frequency (ATF) exciser has the capability of deciding the domain of the interference cancellation. Additionally, adaptive subband transforms are utilized for frequency domain excision. For time-domain excision, the ATF excision algorithm utilizes a sliding time window to reject the nonstationary, pulsed (time-localized) interference. It is shown that the proposed adaptive time-frequency exciser-based DSSS communications receiver drastically outperforms the existing systems. Its performance is nearly optimal and very robust to the inter and intradomain variations of the undesired signal.

AB - A smart time-frequency exciser for DSSS communications is proposed in this correspondence. This technique utilizes the concept of uncertainty in time-frequency analysis of signals. It brings the novel concept of domain switchable signal processing. Hence, the adaptive time-frequency (ATF) exciser has the capability of deciding the domain of the interference cancellation. Additionally, adaptive subband transforms are utilized for frequency domain excision. For time-domain excision, the ATF excision algorithm utilizes a sliding time window to reject the nonstationary, pulsed (time-localized) interference. It is shown that the proposed adaptive time-frequency exciser-based DSSS communications receiver drastically outperforms the existing systems. Its performance is nearly optimal and very robust to the inter and intradomain variations of the undesired signal.

UR - http://www.scopus.com/inward/record.url?scp=0029403350&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029403350&partnerID=8YFLogxK

U2 - 10.1109/78.482125

DO - 10.1109/78.482125

M3 - Article

AN - SCOPUS:0029403350

SN - 1053-587X

VL - 43

SP - 2776

EP - 2782

JO - IEEE Transactions on Signal Processing

JF - IEEE Transactions on Signal Processing

IS - 11

ER -

Adaptive Subband Transforms in Time-Frequency Excisers for DSSS Communications Systems

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this