ADAPTIVE SUBBAND TRANSFORMS IN TIME-FREQUENCY EXCISERS FOR DSSS COMMUNICATIONS-SYSTEMS

被引：52
|
作者：
TAZEBAY, MV
AKANSU, AN
机构：
[1] Department of Electrical and Computer Engineering, Center for Communications and Signal Processing Research, New Jersey Institute of Technology, Newark
来源：
IEEE TRANSACTIONS ON SIGNAL PROCESSING | 1995年 / 43卷 / 11期
关键词：
D O I：
10.1109/78.482125
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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.
引用
收藏
页码：2776 / 2782
页数：7
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