A low complexity NOMA scheme in VLC systems using pulse modulations (invited paper)

The Performance of Visible Light Communication Bit Error Rate with Power Allocation Strategy

“…Equation 3 is an equation that is used to determine the value of the VLC channel which will be one of the variables used to find the value of the received power. Meanwhile, to find out the acceptability value of each user in the system, it is written in (4).…”

“…The nature of the noise interferes with the information signal, so that the received information signal is not the same as the original signal. For total noise, which is the sum of shot noise and thermal noise [4], it is as follows in equation ( 5):…”

“…where 𝒒 is the electron charge, 𝑩 is the bandwidth, 𝑹 is the Photodetector Responsiveness, 𝒉 𝒌 is the channel gain, 𝑷 𝒌 is the transmit power, 𝑰 𝒃𝒈 is the photocurrent generated from background radiation and 𝑰 𝟐 is the noise bandwidth factor. While the thermal noise equation with 𝑲 𝒃 is a Boltzmann constant, 𝑻 is temperature, 𝜼 is fixed capacitance photodetector, 𝑨 𝒅𝒆𝒕 is area detector, 𝑮 is open loop voltage gain, 𝒈𝒎 is FET transconductance [4].…”

“…VLC has several attractive features compared to radio frequency use, such as having a high bandwidth light source [3], high capacity, no electromagnetic interference, license-free spectrum, secure transmission, low cost with existing infrastructure and low energy consumption [4]. Then in section [5] it is stated that other advantages of VLC are also seen in the long service life, high efficiency of use, and relatively low power consumption.…”

“…Visible light communication (VLC) is considered as a complement to radio frequency communication (RF) technology in providing high-speed wireless communication into the user's room or also known as Indoor Visible Light Communication [6]. Based on studies [4] non-orthogonal multiple access (NOMA) is one of the schema files dual access, which was originally proposed for RF wireless communication and also investigated on VLC systems to increase capacity. NOMA Skema Scheme allows each user to share frequency, time and resources space, which can support massive connectivity, improve spectral efficiency and can increase system capacity.…”