Future wireless communication system is expected to have a high data rate transmission. OFDM is a promising candidate for achieving high data rates in mobile environment because of its multicarrier modulation technique. A well-known problem of OFDM is its sensitivity to frequency offset between the transmitted and received carrier frequencies. This carrier frequency offset (FO) causes loss of o...

in this paper, we propose an optical millimetre wave radio-over-fibre (mm-wave rof) system that uses a dual drive mach zehnder modulator (dd-mzm), which is biased at the maximum transmission biasing point, to generate an optical double sideband-suppressed carrier. the input to the dd-mzm are binary phase shift keying (bpsk), quadrature phase shift keying (qpsk), 8-phase shift keying (8-psk) and...

group b streptococcus (gbs) is one of the most important bacteria in the majority of maternal and neonatal infections, such as chorioamnionitis, endometritis, bacteremia, sepsis and meningitis. during pregnancy, gbs screening is one of the recommended strategies that are recommended by center of disease control (cdc). this study was aimed to determine the rectovaginal colonization prevalence am...

Spectrophotometric assays of pyruvate oxidation catalyzed by extracts of the Reiter strain of Treponema phagedenis indicated that viologen dyes, flavin nucleotides, and a ferric iron chelate, but not pyridine nucleotides, were utilized as electron acceptors. Benzyl viologen-linked activity partially sedimented during ultracentrifugation and appeared similar to clostridial pyruvate:ferredoxin ox...

The current work investigates the performance of a single-stage, bench-scale system using a spray dryer to treat produced water. The produced water is generated in three large reservoirs of Ahvaz, Maroon, and Mansouri fields, which have different compositions but the same high total dissolved solids (TDS) and total organic carbon (TOC). The results of this study indicate that the newly develope...

-In this paper, we propose iterative soft-input soft-output (SISO) multi-carrier detection (inter-carrier interference cancellation) and LDPC decoding of the OFDM system in the mobile channel. The proposed SISO multi-carrier detection and sum-product decoding of the LDPC-coded OFDM system can achieve better error rate performance than previous SISO multi-carrier detection and BCJR decoding of c...

Inter Carrier Efficient Method for falling ICI in OFDM Systems Interference (ICI) attributable to the Carrier Frequency Offset (CFO) and Doppler shifts; highly disgrace the performance of OFDM system. For OFDM communication system which is a capable technique for high data rate transmission, the theoretical BER and CIR are complicated to obtain in presence of ICI. The BER of the expected signal...

The flow of energy from the laser to the lattice during pulsed laser annealing of Si is examined, with particular attention paid to the influence of the dense'plasma of hot, photoexcited carriers on-the manner in which this energy transfer occurs. Consideration of carrier thermalization and recombination at high carrier densities suggests that under certain conditions carrier diffusion may incr...