In addition, the widely used correlation detection method is applied to PDSM and VPPM for comparison purposes.
and the BER of the VPPM signal can be calculated using the correlation detection relation above as
and, using the correlation detection relation, the BER of the PDSM signal becomes
For the PDSM signals, the correlation detection method performs better than the dual sampling detection method over the entire light intensity range as well as when no idle pulse transmission occurs; these results confirm the advantage of using a matched filter for various pulse shapes.
i] > 0; therefore, we used a Monte Carlo simulation to determine the BER of correlation detection for PDSM and VPPM signals that include the idle state, and we used (12) to determine the BER of PDSM using dual sampling.
Fourteen contributions describe audio watermarking methods based on spread spectrum, parametric synthesis, correlation detection
, chaotic signal, echo hiding, peak point extraction, and time frequency approaches.