en A Comprehensive Performance Analysis of Direct Detection Receivers inWDMASystems مخابرات Communication پژوهشي Research <p dir="ltr" style="text-align: justify;"><span style="text-align: justify;">In this work the performance of a wavelength division multiple access (WDMA) system with direct detection receiver&nbsp;</span><span style="text-align: justify;">is investigated. For this purpose, the probability of error in a WDMA network with OOK modulation considering&nbsp;</span><span style="text-align: justify;">crosstalk, ISI, photo detector noise and thermal noise is calculated and the effect of each on system performance is&nbsp;</span><span style="text-align: justify;">investigated. The system performance in presence of PIN and APD Photo detectors are compared. Besides the accurate&nbsp;</span><span style="text-align: justify;">calculations of bit error rate, these calculations have also been performed using Gaussian, Chernoff bound and modified&nbsp;</span><span style="text-align: justify;">Chernoff bound approximations for the decision variable. Results of our calculations of the photo detector noise penalty&nbsp;</span><span style="text-align: justify;">in presence PIN and APD photo detectors are presented and compared for different number of channels. Also, from the&nbsp;</span><span style="text-align: justify;">calculations of the receiver sensitivity, an optimum value for the avalanche gain of APD is obtained. The superiority of&nbsp;</span><span style="text-align: justify;">APD over PIN photo detection is also demonstrated.</span></p> <p style="text-align: justify;">In this work the performance of a wavelength division multiple access (WDMA) system with direct detection receiver is investigated. For this purpose, the probability of error in a WDMA network with OOK modulation considering crosstalk, ISI, photo detector noise and thermal noise is calculated and the effect of each on system performance is investigated. The system performance in presence of PIN and APD Photo detectors are compared. Besides the accurate calculations of bit error rate, these calculations have also been performed using Gaussian, Chernoff bound and modified Chernoff bound approximations for the decision variable. Results of our calculations of the photo detector noise penalty in presence PIN and APD photo detectors are presented and compared for different number of channels. Also, from the calculations of the receiver sensitivity, an optimum value for the avalanche gain of APD is obtained. The superiority of APD over PIN photo detection is also demonstrated.</p> Wavelength division multiple access (WDMA), Photo detectors, Direct detection receivers Wavelength division multiple access (WDMA), Photo detectors, Direct detection receivers 8 20 http://jiaeee.com/browse.php?a_code=A-10-1-174&slc_lang=en&sid=1 M. Moulavi-Kakhki M. Moulavi-Kakhki 1003194753284600633 1003194753284600633 Yes D. Rejaly Rejaly 1003194753284600634 1003194753284600634 No