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An analytical approach is presented for an optical IM/DD system with STBC coded OFDM RF subcarrier modulation over a free space optical turbulent channel. The analysis is developed to find the expressions for the output photodetector current and carrier to noise power ratio at the output of the STBC–OFDM demodulator. The average bit error rate is evaluated numerically considering log-normal distribution...
An analytical approach is developed to evaluate the carrier to noise ratio and bit error rate of a free space optical link with RF subcarrier modulation taking into account the effect of weak atmospheric turbulence which is modeled as log-normal distribution. A close form expression for the carrier to noise ratio conditioned on a given turbulence at the output of a direct detection is developed. Average...
An analytical approach is presented to evaluate the bit error rate performance of a wavelength division multiplexing (WDM) fiber-optic transmission link with distributed Raman amplifier taking into account the combined effect of Amplified Spontaneous Emission (ASE) and Raman scattering induced crosstalk for direct detection receiver. The analysis is developed to find the photodetector output due to...
An analytical approach is represented to evaluate the bit error rate (BER) performance results of an optical CDMA (OCDMA) free space optical (FSO) communication system with receive diversity using multiple photodiode dual-detect Sequence Inverse Keying (SIK) receiver. The analysis is presented to find the expression for the signal current and multi access interference (MAI) current at the output of...
Analysis is carried out for a satellite to ground link to evaluate the bit error rate performance limitation imposed by atmospheric turbulence. Considering log-normal distribution for the turbulence indeed fading, the SNR and BER are determined. The average BER Performance results shows that the satellite to ground link at 30 GHz channel suffers significantly due to atmospheric turbulence. Power penalty...
Analysis is presented for an optical link by using a multicore fiber (MCF) considering the effect of mutual coupling among the fiber cores which results in optical crosstalk. Analysis is carried out to find the optical crosstalk power at the output of the multicore fiber (MCF) and the photocurrents due to optical signal and crosstalk at the output of the receiver low pass filter. The signal to crosstalk...
Analysis is carried out for a Multiband Orthogonal FDM Multicarrier CDMA Ultra Wideband system for RFID communications from reader to tag. Analysis is presented for indoor industrial ultra wideband communications over a Nakagami-m fading environment. Results are presented for several code length, number of users and number of subcarrier for a given transmitter power. It is found that multicarrier...
An Analytical approach is presented to evaluate the effect of impulsive noise on the bit error rate performance of a OFDM power line communication system in the presence of background non-white Gaussian noise. The symmetric alpha-stable (SαS) model of impulsive noise is considered to evaluate the BER. The results are evaluated numerically for several power line noise bandwidth and background Gaussian...
An analysis is carried out to evaluate the conditional bit error rate conditioned on a given value of pointing error for a Free Space Optical (FSO) link with multiple PIN photodetector receivers using Equal Gain Combining (EGC). The probability density function (pdf) of output signal to noise ratio (SNR) with receive diversity is also derived in presence of pointing error using EGC. The average BER...
Analysis is presented for a wavelength division multiplexing (WDM) transmission system with optical on-off-keying (OOK) modulation and heterodyne detection taking into account the effect of Raman amplifier induced crosstalk and beat noise components arising out of beating of pump power, signal power and crosstalk during the photodetection process. The results are numerically evaluated at a bit rate...
An analytical approach is presented to evaluate the bit error rate performance of a MIMO power line communication system taking into account the power line noise which is non-white and impulsive in nature. Transfer function of the 2×2 MIMO power line is considered and BER results for a binary PSK link is evaluated numerically for different power line parameters. The result show that there are significant...
Analysis is presented for a UWB RFID communication system using the technique of multi-band OFDM without and with reader receiver diversity. The analysis is provided to find the expression of the bit error rate (BER) of MB-OFDM UWB RFID link with number of receiving antenna at the reader with M-array PAM. BER results are evaluated for indoor industrial UWB environment using several values of MB-OFDM...
A comprehensive study is presented to assess the performance limitations of an optical multicore fiber (MCF) communication system due to crosstalk with on-off Keying (OOK) modulation scheme. The expressions of the signal power at the output of the different cores of the MCF with excitation to any one of the cores is found out along with the crosstalk due to coupling among the cores. Finally, the expression...
An analytical approach is presented to evaluate the effect of cross-polarization in a polarization diversity MIMO satellite to ground link. Analysis is developed to found the interference due to cross-polarization in a 2 ∗ 2 MIMO satellite link. The expression of signal to interference plus noise ration (SINR) is developed. The Bit-Error-Rates(BER) performance results are evaluated for different environments...
Analytical approach is presented to evaluate the effect of weak atmospheric turbulence on the bit error rate (BER) performance of an optical code division multiple access (OCDMA) free space optical (FSO) link using optical domain encoder and Sequence Inverse Keying (SIK) balanced photodetector receiver. The analysis is carried out to find the expression of the signal current and multi access interference...
An Analytical approach is presented to evaluate the bit error rate (BER) of a 3×3 MIMO OFDM power line communication system taking into account the combined effect of impulsive noise, background noise and crosstalk due to mutual coupling among the conductors of a 3-phase line. The BER performance results are evaluated numerically. It is noticed that a 3×3 MIMO PLC system is affected by crosstalk....
In this paper, we derive the expressions for Signal-to-Noise plus Multi Access Interference Ratio (SINR) without and with receive diversity considering Nakagami-m fading channel. The analysis is also extended to Rake receiver with Maximal Ratio Combining (MRC) technique with multiple receiving antenna. The results are presented in terms of BER and improvement of receiver sensitivity due to diversity...
An analytical approach is presented to evaluate the impact of timing jitter on the Bit Error Rate (BER) performance of optical M-ary Pulse Position Modulation (M-PPM) Free Space Optical (FSO) link under the influence of atmospheric turbulence modelled by Log-normal distribution. The expression of the conditional BER for a given timing jitter is developed and the unconditional BER is found over the...
Free Space Optical (FSO) links are very much promising for future terrestrial optical wireless applications due to high bandwidth and easy deployment compared to fiber optic links. However the FSO links are severely degraded by the presence of smoke, fog, snow, cloud etc. which attenuates the optical signal and causes dispersion of the optical pulses. In this paper an analytical approach is presented...
Nonlinear nature of powerline transfer function due to multipath propagation results in fading which can be modeled with a Rician probability density function. Analysis is presented for a power line communication system considering the stochastic gain coefficient with Rician distribution. Orthogonal frequency division multiplexing (OFDM) with binary PSK modulation is considered in carrying out the...
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