Community Forums - Reply To: OFDM IMPLEMENTATION ON OPTISYSTEM

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Free Evaluation

May 6, 2016 at 1:19 pm #38968

Spectator

I also want to add that a generic CO-OFDM system includes five basic functional blocks: OFDM transmitter, RF to optical (RTO) up-converter, optical link, optical to RF (OTR) down-converter, and OFDM receiver. A 10 Gbps coherent 512-subcarrier 4-QAM OFDM system schematic is shown, however the input data for the OFDM modulator can have different modulation formats such as BPSK, QPSK, QAM, etc. At the transmission block, both modulation and multiplexing are achieved digitally using an inverse fast Fourier transform (IFFT). The subcarrier frequencies are mathematically orthogonal over one OFDM symbol period. A CW laser and two Mach-Zehnder modulators are used to up-convert the RF data to the optical domain. The signal is then propagated through the optical link and becomes degraded due to fiber impairments. A coherent receiver with a local oscillator is used to down-convert the data to the RF domain, and finally data is demodulated and sent to the detector and decoder for BER measurements.
Refer to the link. This will be definitely of some help.

Coherent Optical OFDM

Regards

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