Channel capacity and non-uniform signalling for free-space optical intensity channels

Fundamental Limits of Parallel Optical Wireless Channels: Capacity Results and Outage Formulation

“…Capacity upper bounds and achievable rates (capacity lower bounds) for the IM-DD P2P channel have been derived in [11], [32]- [34]. In this paper, we are interested in achievable rates of the form…”

“…For instance, [5], [6] studied constellation design and [7]- [9] studied OFDM for IM-DD systems. Informationtheoretic achievable rates in IM-DD channels have been studied in [10] which focused on on-off keying, and in [11] which considered higher order modulation. Outage performance of IM-DD systems [12]- [14] as well as multi-hop systems [15]- [17] have also been considered in the literature.…”

On the Capacity of the Intensity-Modulation Direct-Detection Optical Broadcast Channel

“…While this inner bound is simple and fairly tight at high SNR, it is not at moderate/low SNR. Next, we provide another inner bound using a discrete input distribution in the spirit of [22].…”

“…We derive the rate region achievable by SC with a TG distribution. We also use a discrete input distributions with finitely many uniformly spaced points [22] to develop an achievable rate region, where we use a successive optimization approach to optimize the distribution of the users. Then, we focus on three SNR regimes: high, low, and moderate.…”

Asymptotic Performance Analysis of Free-Space Optical Links with Transmit Diversity

“…However, the peak optical power should be limited, according to eye-safety standards [31]. Considering the restrictions and communication performance, we introduce the Dual-TLS FSO system, in which the transmitter selects two of the best diversity links to transmit data, and the peak power of each laser source is half that of an SISO system.…”