Wireless Information And Power Transfer In Multiuser OFDM System: A Review

In wireless communication information and power transfer is very challenging task. To perform this task it is important to harvest energy and information decoding. This paper gives an overview of wireless information and power transfer in various techniques along with its advantages and disadvantages. In practical still harvesting energy from radio signals are not able to decode information directly therefore to make theoretical progress in each technique power splitting is essential which helps to split received signal with adjustable power ratio to co-ordinate for energy harvesting and information decoding directly. The orthogonal frequency division multiplexing (OFDM) is a multi-carrier modulation technique which is very much famous in new wireless networks of IEEE standard, digital television, long term evolution (LTE) and audio broadcasting. The main benefit of OFDM over single-carrier schemes is its capacity to survive with severe channel conditions without complex equalization filters. It has upgraded the quality of long-distance communication by eliminating inter symbol interference (ISI) and enhancing signal-to-noise ratio (SNR). The main drawbacks of OFDM are its high peak to average power ratio and its sensitivity to phase noise and frequency offset.