Implementation of Knowba Filtering Method for Intereference Rejection in NBDSSS

Abstract

Spread spectrum communication is a communication method that deliberately makes the bandwidth of the transmitted waveform larger than would be required to transmit the data over the channel.One of the most encouraging multiplexing techniques for present and forthcoming telecommunications services, such as private communications, ad-hoc wireless communications, third-generation cellular telephony and sensor networks, is the CDMA(code division multiple access) implemented with direct-sequence (DS) signaling. DS-CDMA's benefits include superior operation in multi-path settings, flexibility in channel allocation, enhanced capacity in fading settings, and the capability to share bandwidth with narrowband communication technologies without deteriorating the efficiency of either system. In our work,we are proposing a new know-ba strategy to dismissing interference where originally monitoring signal environment with high precision is called from the library and subsequently based on data that is appropriate for dismissing interference. Various interference scenarios are simulated using computer simulations to show the efficiency of the method.