Filter Bank Based Notch Filter for Interference Cancellation in UWB Systems

Saurabh Srivastava; O. P. Sahu

doi:https://doi.org/10.51976/ijari.221413

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Filter Bank Based Notch Filter for Interference Cancellation in UWB Systems

Saurabh Srivastava, O. P. Sahu

Vol 2 , Issue 2 , April - June 2014 | Pages: 85-95 | Research Paper

https://doi.org/10.51976/ijari.221413

Received: March 05, 2014 | Revised: April 20, 2014 | Accepted: May 28, 2014 | Published Online: June 15, 2014

Author Details ( * ) denotes Corresponding author

1. * Saurabh Srivastava, Department of Electronics & Communication Engineering, Teerthanker Mahaveer University, Moradabad, Uttar Pradesh, India (saurabh_nitk@yahoo.com)

2. O. P. Sahu, Department of Electronics & Communication Engineering, NIT Kurukshetra, Kurukshetra, Haryana, India

The primary concern of any communication engineer is the bandwidth of the transmitted or received signal and the noise encountered during the transmission reception process. We analyze the effects of narrowband interference in Multicarrier UWB systems such as short distance IEEE 802.11a system. It is known that the process of narrowband interference cancellation is quite complex especially for ultra-wideband systems due to their power spectral density as low as -41dBm/MHz recommendations by the FCC. We review the model for narrow band interference and use the statistical property of correlation to determine the interference power spectral density. We review the sub band processing of UWB signals and apply notch filtering after measuring the threshold to eliminate the interference. We propose a novel mechanism for generation of the required notch filter using the sub band signals generated after the sub band decomposition of the UWB signal using filter banks. The proposed mechanism may be applied in conjunction with the other filter bank based multicarrier systems that have the advantage of better side-band attenuation of signals than commonly used OFDM system.

Keywords

Multicarrier; Filter Bank; Orthogonal Frequency Division Multiplexing (OFDM); Wireless-Local Area Network (WLAN); Sub-Band Decomposition; Narrowband Interference; Modeling; Cancellation; Adaptation.

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