OPERATION OF A FREQUENCY-SHIFT KEYED SUBCARRIER MULTIPLE-ACCESS SYSTEM FOR A PASSIVE OPTICAL NETWORK IN THE PRESENCE OF STRONG ADJACENT CHANNEL INTERFERENCE

We use low-pass filtering of baseband data to limit the transmitted RF bandwidth and permit operation of a subcarrier channel in the presenc e of two adjacent channels, each with 17 dB higher optical power than the measured channel. Each channel carries 3 Mb/s, and the channel spa cing is 6 MHz. Preliminary measurements indicate that an increase in c hannel spacing to approximately 7.5 MHz will increase the dynamic rang e beyond 20 dB.