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A novel delay-line demodulation method is proposed that can directly convert an AMI-CPFSK signal into a NRZ baseband signal. A pattern-independent 622 Mbit/s CPFSK heterodyne transmission experiment for a fibre span of 121 km is demonstrated by using AMI line coding and the proposed demodulation method.
Inspec keywords: optical communication; encoding; demodulation; frequency shift keying
Other keywords:
Subjects: Optical communication; Modulation and coding methods