Author:Â Suri V S Lalitha Madhuri
Abstract:Â With the rapid growth of digital communication in recent years, the need for high speed data transmission is increased. Moreover, future wireless systems are expected to support a wide range of services which includes video, data and voice. OFDM is a promising candidate for achieving high data rates in mobile environment because of its multicarrier modulation technique and ability to convert a frequency selective fading channel into several nearly flat fading channels. Now OFDM is being widely used in wireless communications standards, such as IEEE 802.11a, the multimedia mobile access communication (MMAC), and the HIPERLAN/2. However, one of the main disadvantages of OFDM is its sensitivity against carrier frequency offset and high PAPR which causes intercarrier interference (ICI). This paper deals with design of an OFDM mechanism in a wireless technology and implementation of double frequency hopping in CDMA to overcome inter channel interferences.
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