Performance evaluation of optically-preamplified hybrid QPSK M-ary PPM systems with finite extinction ratios
Performance of optically-preamplified hybrid QPSK M-ary PPM systems with finite extinction ratios. Theoretical and numerical bit error rates for different symbol sizes and extinction ratios. Power penalties due to finite extinction ratio for both coded and uncoded systems. Decreased probability of slot correct location increases BER in both PPM and QPSK subsystems. Systems with higher values of M may lose their advantage.
extinction ratio homodyne detection probability of bit error pulse position modulation