Comparatative Performance Evaluation of Modified Prototype Filter Bank Multicarrier Cognitive Radio Under Constraints ofLp,K,NandD
Ankur Singh Kang, Renu Vig · The Computer Journal · 2016
With increase in the use of wireless enabled devices and the rapid proliferation of cell phones with demand for voice and data services have necessitated the identification of additional frequency spectrum or judicious use of the currently persisting spectrum. The term cognitive radio (CR) is apt for spectrum access. Deployment of a CR network involves spectrum sensing, spectrum exploitation, performance evaluation and optimization at different levels in the network. The importance of ubiquitous wireless access to the Internet has been constantly growing in the last years, a wireless application becomes more and more sophisticated and widely used, the demand for more bandwidth will increase substantially, in order to compete the growing demand, one has to consider new concepts of better way of utilizing the spectral resources. This paper deals with the Comparatative Performance Analysis of Filter Bank Multicarrier Prototype Filter under the effect of Tero, Bellanger and Phydas Filter Coefficients. In this paper, simulation analysis of multirate filter structures is done which reflects the modifications in Prototype Filter design. Multicarrier modulation is the apt choice for good data rate wireless communication. In multicarrier communication, the perfect reconstruction is the prime requirement for all structures with alias cancellation at Different | $K$ | (Overlapping factor) values when | $L_{{\rm p}}=K\times M-1-D$ |, | $M=N$ |, | $N$ | being number of subcarriers and | $L_{{\rm p}}$ | being prototype filter length, | $D$ | being delay. The Performance Analysis of a Cascade Integrator Comb prototype Filter bank in the context of Filter Bank-based Multicarrier Transmission for CR has also been done here. A benefit of the chosen technique is that, a CIC filter can be designed with a slight adjustment in parameters of interest. The entire performance of the filters designed is analysed and evaluated by analysing Normalized Amplitude versus Normalized Frequency plots at typical | $K$ | and | $N$ | values. The roll off factor plays a significant role in performance analysis of CIC filter. Whatsoever results are obtainable are presented for useful analysis to the radio frequency design engineers working in the domain of multirate signal processing for wireless communication.