This paper presents results of a theoretical investigation to evaluate the performance of code division multiple access communications over multimode optical fiber channels in an asynchronous, multiuser communication network environment. The system is evaluated using Gold sequences for spectral spreading of the baseband signal from each user employing direct-sequence biphase shift keying and intensity modulation techniques. The transmission channel model employed is a lossless linear system approximation of the field transfer function for the /spl alpha/-profile multimode optical fiber. Due to channel model complexity, a correlation receiver model employing a suboptimal receive filter was used in calculating the peak output signal at the ith receiver. The performance measures for the system, i.e., signal-to-noise ratio and bit error probability for the ith receiver, are derived as functions of channel characteristics, spectral spreading, number of active users, and the hit energy to noise (white) spectral density ratio.>

In this paper, we conduct a system performance evaluation of code division multiple access communications over multimode optical fiber channels. More specifically, we complete the task started in Part I of this paper. In our system evaluation, we consider a collection of independent users sharing a common multimode optical fiber channel, which obey a binomial channel access and utilization model. Under this model, the bit error probability at the ith receiver is calculated as a function of the peak receive signal-to-noise ratio; where the signal-to-noise ratio is a function of the number of active users, the bit energy over "white" noise spectral density, and the percentage time users are active. We also make a comparison of the performance of this system with that obtained for an ideal channel.>