Abstract
We present a bandwidth-elastic OFDM-PON scheme for upstream transmission with traffic aggregation by orthogonal band multiplexing. The provision of each ONU's frequency band can be set only by software reconfiguration without any hardware changes. Elastic bandwidth adjustment should meet the bandwidth requirement and transmission quality. With non-uniform subcarriers distribution and adaptive modulation, OFDM-PON can achieve a flexible bit rate and spectrum density to realize the elasticity in bandwidth. Non-uniform subcarriers distribution may bring power variation, which will degrade the transmission performance for the ONU with lower received power. This can be mitigated by adaptive power control according to the filling ratio of each ONU. Adaptive modulation format is used to balance the bandwidth requirement and transmission performance. In simulation, aggregated 20Gb/s OFDM signal with both non-uniform subcarriers distribution and adaptive modulation format have been collectively received to verify the bandwidth elastic scheme.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
