Fig. 3From: Overlapping PPM for band-limited visible light communication and dimmingOPPM dimming example. As the codeword weight, w, decreases, the Pavg decreases, which results in a reduction of light intensity as perceived by the human eye. The number of valid codewords, Q, for a fixed w is Q = n-w + 1, where n is the number of chips per symbol (n = 8 in this example)Back to article page