Linear Direct-Detection Fiber-Optic Receiver Optimization in the Presence of Intersymbol Interference

Simple Moment Generating Function Optimisation Technique to Design Optimum Electronic Filter for Underwater Wireless Optical Communication Receiver

“…There is a large volume of work [9][10][11][12][13][14][15][16][17] based on complex CB and MCB to handle receiver design optimization for optical fiber communication. However, the main elements of receiver optimization methodology are the filter impulse response h f (t), the photodetector internal gain (g), and the threshold for the decision unit F D (Figure 1).…”

“…In [9], the author discussed the receiver design based on directly minimizing the BER. In [10][11][12][13][14][15][16], the authors developed clever approaches to formulate a functional filter (E filter ) by applying upper CB or MCB on the BER for binary optical fiber systems. Typically, the derived E filter encompasses the receiver filter function h f (t), its derivative h ′ f (t), and F D .…”

“…Based on these mathematical foundations, the authors in [10][11][12][13][14][15][16] considered E filter as an input for an Euler-Lagrange operator (J) = ( ∂ ∂h − d dt ∂ ∂h ′ ) [18] to obtain an extremal (minimum or maximum) value of E filter by setting J(E filter ) = 0. The extremal conditions are: for all t ∈ (t 1 , t 2 ), if ∂ 2 ∂h ′ 2 E filter > 0, then the optimum h f (t) minimizes E filter , if ∂ 2 ∂h ′ 2 E f ilter < 0 then h(t) maximizes E filter , and if ∂ 2 ∂h ′ 2 E filter = 0, then E filter degenerates [18].…”

Semi-analytical evaluation of soliton systems in presence of inter-pulse interaction

“…The Chernoff Bound (CB) and the Modified Chernoff Bound (MCB) are commonly used in optical communication systems, due to the great savings obtained in computational resources. It can be shown that the CB is given by [4]:…”

“…The MGF of y(t) conditioned by the symbol, including the inter-symbol interference (ISI), the jitter of the received signal and the equalization process is given by: where 2n is the number of interfering impulses, TB is the bit length, a k is the jitter of the pulse occurring in the time slot k, 4 variable a and tr)hj (z -kT, )dz…”