ELEC 486 Lecture Notes - Wavelength-Division Multiplexing, Pulse Shaping, Sinc Filter
22 Apr 2013
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A report submitted to the department of electrical and computer engineering in conformity with the requirements of elec 486. Bandwidth (bw) is one of the most crucial resources in the communication industry. Fiber optic communication is band limited and typically occurs over the c-band. As modulation rates for optical signals increase each channel occupies more bw in the optical band, meaning less channels will be available at higher modulation rates. In order to squeeze more channels together over a band, pulse shaping can be done. Pulse shaping is a process by which an optical signal is shaped such that its bw is reduced in the frequency domain. Various techniques for pulse shaping are used, with the objective of limiting the bandwidth of each channel while eliminating. The rectangular pulse is the most basic information unit in a digital transmission scheme. A sequence of such pulses constitutes the transmission of information. The information is encoded in the amplitude of the pulse.
