Wireless Light Fidelity Channel Capacity Improvement Using Sparse Sampled Non-Orthogonal Frequency Shift Keying

Abstract

A new technique, which can increase the wireless light fidelity channel capacity based on the white light emitting diode, is proposed. It is implemented by using the non-orthogonal frequency shift keying and the sparse carrier sampling at the same time. The proposed method is verified by using the 1meter wireless visible light communication link with the 30-MHz frequency response. The maximum power penalty due to the sparse carrier sampling is 6 dB at the compression ratio of 62.5 %. The bit error rate of 9.5 × 10 −4 is measured at the frequency spacing of 0.1 MHz (1% of 10-MHz RF carrier). The wireless channel capacity of 130 Mb/s, which corresponds to 13 times of on-off keying-non-return to zero signal (10Mb/s), is obtained at the compression ratio of 70 % using the proposed technique. We also confirm that the 16-NoFSK signal with the 26-dB input signal to noise ratio can be recovered even at the compression ratio of 75 % when the received optical power is more than −6 dBm. INDEX TERMS Light emitting diodes, light fidelity, luminescent devices, microwave photonics, nonorthogonal frequency shift keying, phosphorescence, photodiodes, sparse carrier sampling, visible light communication, wireless channel capacity.

A Multicriteria Decision-Making Framework for Access Point Selection in Hybrid LiFi/WiFi Networks Using Integrated AHP–VIKOR Technique

“…The same procedure allows the methods to be applied separately on user-end devices. The experimental findings also show that the suggested approach in [ 87 ] may significantly increase the LiFi channel capacity of a wireless LiFi transmission link based on a white LED.…”