Enhanced performance analysis of a hybrid spectrum sliced‐wavelength division multiplexing‐mode division multiplexing‐orthogonal frequency division multiplexing based radio‐over‐free space optics

Abstract

In this work, we report the use of self-phase modulation in a high nonlinearity fiber for super continuum frequency generation which is spectrum-sliced using a demultiplexer. Four channels (193-193.225 THz) are sliced with 75 GHz channel spacing. Each wavelength channel transports two distinct sub-channels with 20 Gbit/s-40 GHz data rate over different Laguerre Gaussian spatial modes (LG02 and LG03) using the proposed hybrid spectrum sliced-wavelength division multiplexing-mode division multiplexing based orthogonal frequency division multiplexing-radio-over-free space optics link. The performance of the proposed link is investigated using numerical simulations. 160 Gbit/s-320 GHz data is transmitted at 20 km for clear conditions with reliable performance. We have also analyzed the link performance under different level of fog weather. Further to maximize the link reach, we have proposed an enhanced detection at the receiver terminal. The results of numerical investigation of the link show an improvement of 40 dB in signal-to-noise ratio and received power under different weather conditions using the proposed detection technique.

Effective Beamforming Technique Amid Optimal Value for Wireless Communication

“…In a reverse link transmission, M user is transferring signals to BS. Consider a case SM where E|SM| 2 = 1 is the transmitted signal from the Mth user and Mth user share the precisely the identical sources of time and frequency and in an overall way the M × 1 received signal vector at the BS is the combination of all signals transferred from all users as in Equations ( 4) and (5). The subsequent portion represents uplink transmission.…”

“…The power optimization issue as defined in [5] and moreover for the centralized control system and distributive control system in the listed literature is providing the building block for power transmission [6,19]. Via transmit beam-forming, the optimization of metric for performance utility can be attained, however it is a generic l function in SINR [14,16].…”

“…Via transmit beam-forming, the optimization of metric for performance utility can be attained, however it is a generic l function in SINR [14,16]. Assessment in the simple power minimization issue as mentioned below is not a complex task to practice to develop optimal beam-forming structure [5,6]…”

“…User terminals (UTs) which are mobile may obtain wireless facilities from a base station located exclusive in every cell, in a range of the coverage region. There should be the establishment of a networking connection among all base stations (BSs) with a central or critical network wired [5]. This increases the likelihood of a few problems, like inter-cell interference (ICI) and path loss.…”

Performance analysis of long‐reach 40/40 Gbps mode division multiplexing‐based hybrid time and wavelength division multiplexing passive optical network/free‐space optics using Gamma‐Gamma fading model with pointing error under different weather conditions

“…But the performance of the hybrid PON-FSO system is degraded due to severe, random and unpredictable atmospheric turbulence channels of the FSO system. [21][22][23] Yeh et al, designed and demonstrated a hybrid PON-FSO system under clear weather condition. The experimental results show the successful transmission of 10 Gbps information up to an FSO and fiber link range of 300 m and 25 km, respectively.…”