[PDF] Top 20 An Investigation of an Optical Multiple Pulse Position Modulation Link over a Dispersive Optical Channel

... In this thesis, a detailed analysis of the MPPM format is presented when operating in a highly dispersive optical channel. Chapter 1 presents the background and motivation of this work. Chapter 2 ... See full document

... correcting pulse is inserted as for an Erasure error ...R pulse would cause a voltage to appear in the following empty time slot which could contribute to a false S  ... See full document

... Digital PPM coding can operate with very low average power and offer a high sensitivity, thus it is the preferred choice for optical inter-satellite links. However, it does suffer from a very large bandwidth ... See full document

... Indoor optical wireless communication is also called wireless infrared communication, whereas outdoor optical wireless communication is commonly known as free space optical (FSO) communication ... See full document

... chip position corresponding to the patterns of the desired signature sequence, as indicated by the blue arrows in figure ...interfering channel, see figure ... See full document

... analogue optical link, work has been carried out on linearisation of optical sources, reduction of laser intensity noise, optimisation of optical receivers ...stage modulation systems ... See full document

... diffuse link is more susceptible to corruption by ambient light noise, high signal attenuation, and intersymbol interference caused by multipath disper- ...use link needs more transmitted power than an LOS ... See full document

... Directed-LOS link systems improve power efficiency because the transmitted power is concentrated into a narrow optical beam, making possible the use of narrower field-of-view (FOV) receivers, and an ... See full document

... use optical code division multiple-access (OCDMA) technique ...experimental investigation, which uses 405nm wavelength, was carried out to indicate wireless transmission at 968Mbit/s rate ...uses ... See full document

... binary pulse position modulation, and direct detection, where optical links are characterized by Log-normal distributed irradiance and path ...input multiple output) based FSO system ... See full document

... transmitted over the optical link on a bit-by-bit basis (binary encoding) or on a data word basis (block ...source. Channel coding is used to improve the reliability of the system performance ... See full document

... spatial pulse position modulation (SPPM) is used as a case study to investigate the performance of the optical spatial modulation (SM) technique in outdoor atmospheric turbulence ...the ... See full document

... space optical channel models are not suitable for underwater ...reliable channel model and relevant technologies must be proposed and ...derive channel models for UWOC system, we should ... See full document

... Binary modulation formats (BASK, BFSK, BPSK) are rather inapplicable and incompetent for future high speed networks because of lower spectral ...multilevel modulation is the key to increase capacity within ... See full document

... new, optical-princi- ple-based measurement apparatus, further on a defi­ nition o f and the requirements for the optical quan­ tity measured, on the structured selection o f surface param eters measured, ... See full document

... Reference [80], using also an extra rate equation for the carriers crossing the barrier region of GRIN-SCH lasers, shows both theoretically and experimentally th a t carrier transport across the barriers degrades the K ... See full document

... semiconductor optical amplifier (SOA)-based optical single sideband (SSB) modulation technique is proposed and ...generate optical SSB signal. Over an- 80 km single-mode fiber (SMF) ... See full document

... and Wavelength Assignment”. The former can be further broken down as segment-links and link only schemes. The latter harnesses heuristic algorithms to underpin power consumption minimization taking into account ... See full document

... allows optical concentrators to be employed along with thin film optical filters, since the angular dependence of the filter response does not pose a ...known link topology, and has been used for ... See full document

... different modulation formats such as PSK (Phase Shift Keying) and QAM (Quadrature Amplitude ...OFDM Modulation. Quadrature Amplitude Modulation (QAM) is both analog and digital ...This ... See full document