Asymmetrical clipping optical filter bank multi-carrier modulation scheme

Abstract

Filter bank multi-carrier (FBMC) is considered a promising alternative to the Orthogonal Frequency Division Multiplexing (OFDM) scheme. It improves spectral efficiency by eliminating the need for cyclic prefix while attenuating interference due to the robustness of the out-of-band emission. In this work, we present a framework, and the performance evaluation of FBMC is a multi-carrier modulation scheme for the direct detection of optical communications. As the proposed model has higher spectral efficiency than the classical ACO-OFDM, as removing the guard interval enhances the spectral efficiency. Furthermore, the perfect rectangular pulse shaping and eliminating the out of band emission of the filter bank enhances the ACO-FBMC the BER performance of the ACO-OFDM. We propose a transceiver model for Asymmetrical Clipped Optical FBMC (ACO-FBMC) based on Fast Fourier Transform (FFT) operations, analyze inter-frame interference, and offer an iterative receptive method to eliminate it. Finally, we compared the bit error rate (BER) performance of the ACO-FBMC using different overlapping factors with the ACO-OFDM.

Optimization of 5-Locations LDs for VLC Systems Illumination

“…The proposed lighting units are also installed in the ceiling, as the dimensions of the LD unit are shown in Figure 1, while the indoor area space is divided into five networks to cover the indoor room. The previous configurations with four illumination units, it was noticed in this model that the distribution of lighting units on the corners of the room with equal dimensions and provides good lighting, but the middle of the room was vanished, which generated a small semi-dark lighting area called the cold zone [1][2][3][4][5][6][7][8][9], as well as 16 illumination units, are insufficient to provide large cellular coverage. The lighting units were distributed along the edges of the room without paying attention to the distribution of lighting in the middle of the room [14], as it is noticed that the power distribution drops in the center of the room, the receiver power is high, and the SNR is low.…”

“…Therefore, the most efficient modulation techniques are used, such as OFDM modulation technology, which gives acceptable spectral efficiency. But this technique has disadvantages due to the presence of CP [5,6], which reduces the bandwidth. Besides the large side lobes, which lead to leakage in spectral efficiency, FBMC modulation technology was used, which is characterized by large bandwidth and high spectral efficiency.…”

A Novel 4 × 1 MISO-VLC System with FBMC-OQAM Downlink Signals

“…One of the most common methods is using the multicarrier modulation technique, which divides high-speed data streams into multiple low-speed sub-streams. This method effectively improves spectral efficiency [5][6][7][8]. It has been widely applied in many optical access systems, such as multi-carrier modulation passive optical network systems, optical wireless communication systems, and indoor visible-light communication systems [9][10][11].…”