Pre-compensation combined with TS-aided and ISFA-enhanced scheme for UWB system

OCT-Precoding Combined with LDPC-Coding Scheme for 128 QAM MB-OFDM UWBoF System

“…ree TSs were added to the three subbands, respectively 2 Advances in Condensed Matter Physics [12]. e TSs on the first subbands were used for symbol synchronization and for estimating the channel of the first subband.…”

“…For MB-OFDM UWB signals, in the process of optical fiber transmission, it is easy to be affected by the nonlinearity of optical devices and optical fibers, especially the noise of modulators and amplifiers, chromaticity dispersion, and insertion loss of optical fibers. In order to overcome the signal deterioration caused by the above problems, dispersion precompensation scheme, intrasymbol frequency-domain averaging (ISFA) adaptive selection of the best window scheme, and LDPC-coding forward error correction technology have been applied to MB-OFDM UWB systems [12][13][14], which are committed to improving the transmission performance in optical fiber systems.…”

Improved Training Sequence Channel Estimation Scheme in 16QAM MB-OFDM UWBoF System

“…However, the former does not consider the influence of noise, and the latter is very complex [13]. As for the MB-OFDM UWBoF system, whose channel estimation algorithm is used, it will depend on the specific situation [14,15]. is paper proposed joint symbol synchronization and channel estimation scheme based on the same training sequence and improved the channel estimation scheme for ISMI.…”