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...

Time reversal (TR) has been proposed as a competitive precoding strategy for low-complexity devices relying on ultra-wideband waveforms, it shifts the signal processing complexity to transmitter side. This transmit paradigm can address need low-power, receivers, which is particularly important Internet of Things. Due its spatio-temporal focusing property, TR also used design multiple access sch...

An alternative code-division multiple-access (CDMA) scheme to spread spectrum (SS), called spread time (ST) is proposed for badlimited multiple-access channels. ST-CDMA can be considered the be-frequency dual of SS-CDMA. In ST-GDMA pslendsraodan (PN) sequences are assigned to each user, and the Fourier tcrursf@rm of the transmitted pulse for a given user is d&mined by modulating the phase of th...

With the advent of cheap, miniaturized electronics, ubiquitous networking has reached an unprecedented level complexity, scale and heterogeneity, becoming core several modern applications such as smart industry, buildings cities. A crucial element for network performance is protocol stack, namely sets rules data formats that determine how nodes in exchange information. great effort been put to ...