Multinary Signaling based Coded Modulation for Ultra-High-Speed Optical Transport
AssigneeNEC Laboratories America, Inc.
InventorsTing Wang, Ivan Djordjevic
Life of this patent
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Abstract
Systems and methods for communication using an optical transmission system having optical transmitters and receivers includes performing a low-density parity-check (LDPC) encoding; performing nonbinary pm-ary signaling, where p is a prime larger than 2; taking m p-ary symbols at a time and selecting a point from pm-ary signal constellation; after up-sampling and driving amplification, using coordinates of the pm-ary constellation as input of I/Q modulator x (y); combining two independent pm-ary streams corresponding to x and y-polarization states by a polarization beam combiner (PBS) and transmitting data over the optical transmission system.
Claims21
A method for communication using an optical transmission system having optical transmitters and receivers, comprising:
- performing a low-density parity-check (LDPC) encoding;
- performing nonbinary pm-ary signaling, where p is a prime larger than 2. taking m p-ary symbols at a time and selecting a point from pm-ary signal constellation;
- after up-sampling and driving amplification, using coordinates of the pm-ary constellation as input of I/Q modulator x (y);
- combining two independent pm-ary streams corresponding to x and y-polarization states by a polarization beam combiner (PBS) and
- transmitting data over the optical transmission system
Dependencies are inferred from the claim text.