Iterative Receiver Based on Flip-OFDM in Optical Wireless Communication
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 6
Abstract
To assure nonnegative signals in optical wireless communication (OWC) system, flipped orthogonal frequency division multiplexing (Flip-OFDM) transmits the positive and the negative parts of the signal over two consecutive OFDM sub-frames (positive sub frame and negative sub-frame, individually). As in the conventional receiver for Flip-OFDM recovers the data by subtracting the negative part of the signal from the positive one. As the signal analysis shows that the information will be transmitted by both the OFDM sub-frames. But in the conventional receiver there is a loss of data. To overcome this problem an iterative receiver is then proposed to improve the performance of Flip-OFDM by exploiting the signals in both the OFDM subframes. Simulation results demonstrate that the proposed iterative receiver provides significant signal to noise ratio (SNR) gain over the conventional receiver.
Authors and Affiliations
Dr. N. K. Choudhari, Jyotsna S. Sawarkar
Keywords
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