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By M. Khatib

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5 GHz = 875 MHz and 4 2 * 239 F = F . 1 2 * (239 + 16) + 8 2 F = 2 (3) The frame format is realized as follows: the input source byte stream is written into the dual port FIFO memory at a slow frequency f1. When the FIFO memory is half-full, the encoding control reads out data stored in the register at a higher frequency f2. The encoding control generates an 8 bytes preamble at the beginning of each frame, which is bypassed by the RS encoder and the scrambler. The RS encoder reads one byte every clock period.

14b. Miss detection probability with 64 bits preamble 10 -2 -1 10 36 Advanced Trends in Wireless Communications Fig. 15a and Fig. 15b show the false alarm probability versus threshold S, with 32 and 64 bits preamble, respectively. P for 32 bits preamble, p = 10-2 f 0 10 P f1 P False alarm probabilities Pf f2 -5 10 -10 10 -15 10 -20 10 0 5 10 15 20 Threshold S 25 30 35 Fig. 15a. False alarm probability with 32 bits preamble P for 64 bits preamble, p = 10-2 f 0 10 P f1 P False alarm probabilities Pf f2 -10 10 -20 10 -30 10 -40 10 0 10 20 30 40 Threshold S Fig.

2010). Average symbol error probability of general-order rectangular quadrature amplitude modulation of optical wireless communication systems over atmospheric turbulence channels, IEEE/OSA Journal of Optical Communications and Networking 2(1-3): 102–110. Popoola, W. , Ghassemlooy, Z. & Ahmadi, V. (2008). Performance of sub-carrier modulated free space optical communication link in negative exponential turbulence environment, International Journal of Autonomous and Adaptive Communication Systems 1(3): 342–355.

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