Performance investigation of spectral-efficient high-speed inter-satellite optical wireless communication link incorporating polarization division multiplexing

Abstract

Space information transmission links are crucial for covering the entire globe for communication purposes. The traditional microwave frequency-based satellite communication links have high latency and low information transmission rates. In the last few years, intersatellite optical wireless communication (IsOWC) technology has evolved significantly as a result of its numerous benefits like wide channel bandwidth, high-speed links, and low mass and power requirements. Different research groups have proposed IsOWC links based on conventional on-off modulation schemes for transmitting 10 Gbps data between satellites separated in space. But the future generation transmission links require higher spectral efficiency and data rates with longer transmission reach. In this research, a novel singlechannel spectrum-efficient 160 Gbps polarization division multiplexing-based IsOWC link is investigated for long communication range transmission. In this design, coherent detection technique is employed to mitigate the effects of system errors and space turbulence (i.e. pointing errors). A digital signal processing module has been proposed for minimizing the information signal degradation due to space turbulences and to estimate the carrier phase of the signal received. The results show that 160 Gbps information is successfully transmitted over 20,000 km range with an acceptable bit error rate (BER). Also, the influence of different system parameters including pointing error angle, receiver aperture diameter, and additional losses on the signal BER is numerically investigated.

Ultra-High Capacity Optical Satellite Communication System Using PDM-256-QAM and Optical Angular Momentum Beams

“…It is suggested to use higher TADs for the higher-order OAM beams. We considered LG mode profiles with larger differences such as LG00, LG140, and LG400 to realize OAM multiplexing, and it was observed that mode coupling becomes insignificant in these distant mode profiles as compared to the reported research where LG/HG modes with lesser gaps are considered [ 1 , 43 , 44 , 58 ]. We performed an extensive literature survey and found that the highest capacity that has been reported so far in OSC is 4 [ 44 ], 3.84 [ 61 ], 1.6 Tbps [ 62 ], and 320 Gbps [ 63 ].…”

“…For OSC systems, single polarization QAM [ 57 ] and dual polarization QAM with different variants such as 4-QAM [ 37 ], 16-QAM [ 58 ], 64-QAM [ 59 ], and 128-QAM [ 60 ] have been reported several times and revealed that bandwidth efficiency of higher QAMs is better than conventional QPSK, DPSK, etc. modulations.…”

“…It is observed that the highest capacity is accomplished in the proposed work as compared to [ 41 , 42 , 44 , 61 , 62 , 63 ]. Moreover, the use of DQPSK [ 41 ], 4-QAM/PSK-OFDM [ 43 ], PDM-QPSK [ 44 ], SP-QAM [ 59 ], PDM-4-QAM [ 37 ], PDM-16-QAM [ 58 ], PDM-64-QAM [ 59 ], and PDM-128-QAM [ 62 ] have been reported in these researches. However, the proposed system has employed high spectral efficiency (eight bits per symbol) based PDM-256-QAM in OSC-OAM system.…”

Performance of orthogonal frequency division multiplexing based M‐ary quadrature amplitude modulation in asymmetrical dual‐hop mixed RF‐FSO transmission system

“…Yang et al 31 have analyzed the performance of fixed and variable gain relays in dual‐hop RF‐FSO systems and considered a subcarrier intensity modulated system. Mode division multiplexing and polarization division multiplexing‐based FSO systems for inter‐satellite communication were proposed in previous studies 32,33 . The practical implementation of m‐QAM and m‐PSK‐based FSO systems was studied with 650 and 850 nm wavelengths 34 .…”

“…Mode division multiplexing and polarization division multiplexing-based FSO systems for inter-satellite communication were proposed in previous studies. 32,33 The practical…”