Performance analysis of multibits/sequence-period optical CDMA receiver with double optical hardlimiters

We analyze performance of multibits/sequence-period optical code division multiple access (MS-OCDMA) systems with double optical hardlimiters (DHL) in the presence of PD noise, thermal noise, and channel interference. We apply Reed-Solomon (RS) codes to MS-OCDMA to further improve the error rate performance. We show that the MS-OCDMA receiver with DHL improves the bit error probability of MS-OCDMA systems when the received laser power is large. We also show that the RS coded MS-OCDMA systems have the higher bit rate and the lower chip rate than the on-off keying OCDMA (OOK-OCDMA) systems for approximately the same bit error probabilities, respectively.