Phase-diversity hybrid optimization in case of a two-detector receiver

Phase-diversity hybrid optimization in case of a two-detector receiver

The performance of two-detector phase-diversity circuits is investigated in the case of restricted local oscillator power. A 120 degrees hybrid with 33.3% throughput is found to be optimum for CPFSK, while a 90 degrees hybrid with 29.3% throughput is optimum for ASK and DPSK. The sensitivities of th...

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Veröffentlicht in:IEEE photonics technology letters 1992-09, Vol.4 (9), p.1060-1062, Article 1060
1. Verfasser: van Deventer, M.O.
Format: Artikel
Sprache:eng
Schlagworte:
Computer aided software engineering
Detectors
Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Local oscillators
Optical noise
Optical polarization
Optical receivers
Optical scattering
Phase detection
Phase noise
Physics
Throughput
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Zusammenfassung:The performance of two-detector phase-diversity circuits is investigated in the case of restricted local oscillator power. A 120 degrees hybrid with 33.3% throughput is found to be optimum for CPFSK, while a 90 degrees hybrid with 29.3% throughput is optimum for ASK and DPSK. The sensitivities of these hybrids are 1.87 and 1.37 dB, respectively-better than that of the conventional 90 degrees /25% hybrid. The novel 90 degrees /29.3% hybrid can be implemented as a partially symmetric 3*3 coupler or as a polarization-type phase-diversity hybrid.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.157149