Optical transmission system and characteristic estimation method
AssigneeNippon Telegraph and Telephone Corporation
InventorsTakeo Sasai, Masanori Nakamura, Asuka Matsushita, Yoshiaki Kisaka
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Abstract
An optical transmission system, in which an optical transmission apparatus and an optical reception apparatus are provided, includes a coefficient determination unit configured to optimize, based on a reception signal received by the optical reception apparatus, a coefficient to be used to compensate for deterioration according to characteristics of each device configuring a transmission path between the optical transmission apparatus and the optical reception apparatus, and a device characteristic estimation unit configured to estimate the characteristics of each device by using the optimized coefficient.
Claims15
An optical transmission system that includes an optical transmission apparatus and an optical reception apparatus, the optical transmission system comprising:
- a coefficient determination unit configured to optimize, based on a reception signal received by the optical reception apparatus, a coefficient to be used to compensate for deterioration according to characteristics of each device and thereby configuring a transmission path between the optical transmission apparatus and the optical reception apparatus;
- and
- a device characteristic estimation unit configured to estimate the characteristics of each device by using the optimized coefficient, wherein when the coefficient determination unit is provided in the optical reception apparatus, the coefficient determination unit estimates, for each device configuring the transmission path, an inverse characteristic response model of linear response and nonlinear response based on the reception signal, and optimizes the coefficient so that an evaluation function relating to an output signal obtained by using the inverse characteristic response model and the reception signal becomes equal to or greater than a predetermined threshold.
A characteristic estimation method for an optical transmission system including an optical transmission apparatus and an optical reception apparatus, the characteristic estimation method comprising:
- a coefficient updating step of optimizing, based on a reception signal received by the optical reception apparatus, a coefficient to be used to compensate for deterioration according to characteristics of each device configuring a transmission path between the optical transmission apparatus and the optical reception apparatus, and
- a device characteristic estimation step of estimating the characteristics of each device by using the optimized coefficient,
- wherein when the coefficient updating step is provided in the optical reception apparatus, the coefficient updating step estimates, for each device configuring the transmission path, an inverse characteristic response model of linear response and nonlinear response based on the reception signal, and optimizes the coefficient so that an evaluation function relating to an output signal obtained by using the inverse characteristic response model and the reception signal becomes equal to or greater than a predetermined threshold.
An optical transmission system that includes an optical transmission apparatus and an optical reception apparatus, the optical transmission system comprising:
- a coefficient determination unit configured to optimize, based on a reception signal received by the optical reception apparatus, a coefficient to be used to compensate for deterioration according to characteristics of each device and thereby configuring a transmission path between the optical transmission apparatus and the optical reception apparatus;
- and
- a device characteristic estimation unit configured to estimate the characteristics of each device by using the optimized coefficient, wherein when the coefficient determination unit is provided in the optical reception apparatus, the coefficient determination unit estimates, for each device configuring the transmission path, a characteristic response model of linear response and nonlinear response based on the reception signal, and optimizes the coefficient so that an evaluation function relating to an output signal obtained by using an inverse characteristic response model and the reception signal becomes equal to or greater than a predetermined threshold.
Dependencies are inferred from the claim text.