Effect of Cyclic Prefix on Data Rates

ABSTRACT: 4G – network systems require higher reliability and high spectral efficiency. To achieve this Orthogonal Frequency Division Multiplexing (OFDM) is considered to be the best modulation technique for 4G- networks. OFDM can provide large data rates with sufficient robustness to radio channel impairments. OFDM is designed such a way that it sends data over hundreds of parallel streams which increases the amount of information that can be sent at a time. It can offer high quality performance in terms of bandwidth efficiency, robustness against multipath fading and cost-effective implementation. A guard time, in the form of cyclic prefix (CP), is inserted between OFDM symbols to eliminate both the inter-symbol interference (ISI) and the inter-channel interference (ICI). In this paper we have studied the effect of cyclic prefix on data rate using OFDM modulation techniques. Simulation is performed using MATLAB simulator by taking case of 802.16 networks