Digital filter bank implementation using Multirate Techniques for Spreading codes and Rate Transition techniques in Spread Spectrum

Rajiv, Mohan David and Kumara, Shama and Nayak, Prabhakar K (2012) Digital filter bank implementation using Multirate Techniques for Spreading codes and Rate Transition techniques in Spread Spectrum. International Research Journal of Signal Processing, 3 (1). ISSN 2249 – 6505

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Abstract

Multirate signal processing plays a vital role in the area of digital communication for improving the data rate. This paper covers a broad area of topics in Multirate signal processing and their significant contribution in the area of digital communication. Through this paper we have simulated filter banks with varied sampling rates for different spreading sequences such as PN sequence, Gold sequence, Kasami sequence and Barker sequence. The filter bank for these spreading sequences consists of an Analysis and Synthesis section. A comparative study is made for multiple factors of sampling rates and their time domain and frequency domain characteristics are implemented. Here the sampling rate conversion is performed entirely in the digital domain. Sampling rate conversion done in digital domain helps in avoiding signal distortion and quantization effects in the process of analog to digital conversion. This application of sampling rate conversion in multirate signal processing is being included in the implementation of digital filter banks and quadrature mirror filters. We have also reviewed the autocorrelation and cross correlation properties of spreading codes and also rate transition techniques have been adopted which helps in increasing the overall system performance of the spread spectrum due to the increase in its processing gain.

Item Type: Article
Uncontrolled Keywords: Multirate, PN sequence, Gold sequence, Kasami sequence, Barker sequence, Filter banks and Rate Transition.
Subjects: Engineering > MIT Manipal > Electronics and Communication
Depositing User: MIT Library
Date Deposited: 01 Apr 2014 11:33
Last Modified: 01 Apr 2014 11:33
URI: http://eprints.manipal.edu/id/eprint/139174

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