[PDF] Top 20 Digital pulse interval modulation for optical communication systems

... PPM pulse detection [Mecherle86], [Boerner] and ...a pulse by detecting and comparing the maximum number of photons within a time ...original pulse stream with ...the pulse stream during ... See full document

... time modulation such as pulse position modulation (L-PPM) and digital pulse interval modulation (L-DPIM) can achieve higher power efficiency but at the expense of ... See full document

... In optical systems operating in the positive region only, the bit ‘1’ of the spreading sequence is modulated with a positive square pulse, whereas the bit ‘0’ is modulated with an empty chip, both ... See full document

... The duobinary modulation is a scheme for transmitting R bits/sec signal data rates using less than R/2 Hz bandwidth. Due to the Nyguist theorem, the minimum bandwidth required to transmit R bits/sec is R/2 Hz to ... See full document

... Nyquist-spaced optical transmission system using EDC, partial-bandwidth DBP and full-field DBP has been implemented based on the modulation format dependent noise model, where different modulation ... See full document

... employing Pulse Time Modulation (PTM) schemes which will be discussed ...a pulse carrier can be used to convey ...n-PAM modulation format, n distinct intensity levels are used, each of these ... See full document

... PIM is part of anisochronous PTM techniques. The main characteristic of anisochronous schemes is that they do not have a fixed symbol structure, which means that the symbol length varies and is determined by the ... See full document

... Abstract: Optical communication systems often arise as the most efficient solution to transmit at high data rates and also over long ...in optical communication are focusing on ... See full document

... high-speed digital PPM: the laser transmitter must be fast, the receiver must have a wide bandwidth and the digital coder/decoder must operate at the digital PPM clock rate, resulting in bandwidth ... See full document

... in optical fibre ...dispersive optical carrier, which imposes a significant bandwidth limitation in the optical ...speed optical sources such as light emitting diodes (LEDs) can be used, while ... See full document

... cooperative communication has been considered as an effective solution, either as mixed RF/FSO systems or as serial FSO systems [3]–[11] using either amplify-and-forward (AF) or decode- and-forward ... See full document

... Similar modulation combinations had been proposed in the literature, such as the differential amplitude pulse position modulation (DAPPM) [64], which combined the differential pulse position ... See full document

... average optical power requirement and having DC and low frequency ...the pulse position modulation (PPM) offering the best performance but is susceptible to the multipath induced ISI in NLOS links as ... See full document

... indoor optical wireless communication ...efficient modulation technique compared with PPM, since DPIM symbols contain, on average, fewer slots than PPM symbols, for any given ...average ... See full document

... Unless the channel is non-dispersive, for an Si sequence o f m slots, c* will contain m taps: a single precursor tap, a zero tap co, which has the largest magnitude, and (m-2) post-cursor taps. Thus, only the penultimate ... See full document

... of systems require alignment of the transmitter, the receiver, or both, making them less convenient to use for certain ...link systems improve power efficiency because the transmitted power is concentrated ... See full document

... in communication applications such as AM radio receivers, frequency demodu- lators, multipliers, dividers, frequency synthesizers, ...analog systems, the signal needs to be sampled continu- ously which is a ... See full document

... Nyquist-spaced optical communication systems, where the effect of signal spectral broadening is taken into ...of modulation formats including dual-polarisation QPSK (DP-QPSK), DP-16QAM, and ... See full document

... header pulse interval modulation M ...P.P.M modulation scheme and thus providing higher bit ...starting pulse The time slot incorporated each symbol is as well ... See full document

... high-speed optical fiber communication systems can be significantly degraded by the impairments in the transmission channels and laser sources, such as chromatic dispersion (CD), polarization mode ... See full document