Orthogonal frequency-division multiplexing Essays

correlation between the user for high performance of system of optical network, is suffer from the long length of code in optical code division multiple access system. The cost of the is also very high for designing of code. Security of spectral amplitude code is also very low due the availability of information at every spectrum of code in optical code division multiple access system. There is need of code that should have smaller length of code with low complexity of design of system .such type

communicating system with a common receiver (e.g., uplink of a cellular system), are between signals from a single transmitter to multiple receivers process (e.g., downlink of a cellular system), 1.2 Multicarrier Modulation Technique Orthogonal Frequency division multiplexing (OFDM) is a type of multicarrier modulation scheme. OFDM systems have lot of advantages of system in providing high data rates with sufficient robust against radio channel impairments. OFDM has been adopted in several wireless network

As wireless technologies continued to evolve, however, several standards, which govern wireless technology, were developed by the Institute of Electrical and Electronics Engineers (IEEE). The IEEE 802.11 Working Group (WG), for example, is responsible for specifying the family of standards for wireless LAN technology. The IEEE 802.11 WG’s main goals are to produce standards that encourage interoperability of products made by different vendors and to ensure that wireless LANs provide equivalent