Mazher, Wamidh JalilIbrahim, Hadeel TariqMathboob, Yaareb M.Uçan, Osman Nuri2021-05-152021-05-1520190091-32861560-2303https://doi.org/10.1117/1.OE.58.2.027106https://hdl.handle.net/20.500.12939/770mazher, wamidh jalil/0000-0003-2092-3745; Al-Rayes, Hadeel/0000-0001-9749-4024The optical decoding and forward (ODF) performance with long systematic Hamming distance-4 (LSD_4) codes is suggested. Hereby, the LSD_4 codes are produced via generating 224 codewords of 15 bits length. The LSD_4 codes length is extremely long (equal to 4096 bits); accordingly, the encoding/decoding by the LSD_4 codes becomes more compatible with optical speed and consistency. Apparently, increasing the length of coding is concurrent with the ODF speed. Our model is grounded on hiring the LSD_4 codes in the encoding/decoding process of the onboard ODF for optical routing serial. The net gain of plugging the planned LSD_4 codes in optical routing is obtained within 5- to 15-dB range for diverse optical routing forms at code length 4096 bits with Q-ary pulse-position modulation. The numeric and simulated results confirmed the significant improvements of the planned LSD_4 codes performance with ODF over the non-LSD_4 codes ODF counterparts. (C) 2019 Society of Photo-Optical Instrumentation Engineers (SPIE)eninfo:eu-repo/semantics/closedAccessFree-Space OpticalOptical RoutingPulse-Position ModulationSystematic Distance-4 CodingChannel CodingAtmospheric TurbulenceArticle10.1117/1.OE.58.2.0271065822-s2.0-85062601173Q2WOS:000463894400050Q4