The Richardson-Lucy Algorithm Based Demodulation Algorithms for ...

Introduction
Two-dimensional ISI Channel Model
Wiener Based Demodulation Algorithms
Richardson-Lucy Based Demodulation Algorithms
Comparison of Wiener and Richardson-Lucy Based Algorithms
Conclusions
Blind and Nonblind Richardson-Lucy Algorithms
Richardson-Lucy Algorithm for AWGN Channel
Richardson-Lucy Based Demodulation Algorithms
Blind Demodulation with Progressive Thresholding
BER Performance
Blind Richardson-Lucy Algorithm – Blind Deconvolution of
Nonnegative Images
Initialize s(x, y) and h(x, y)
Blind Richardson-Lucy iteration
Estimate h(x, y)
[
]
h (r+1) (x, y) = h(r) (x, y) v(x, y)
∑
(x,y) s(x, y) h (r) (x, y) ∗ ∗s(x, y) ∗ ∗s(−x, −y) (12)
Estimate s(x, y)
[
]
s (r+1) (x, y) = s (r) v(x, y)
(x, y)
s (r) (x, y) ∗ ∗h(x, y) ∗ ∗h(−x, −y)
Nonnegative everything.
(13)
Zhijun Zhao and Richard E. Blahut
The Richardson-Lucy Algorithm Based Demodulation Algorithm