18276985. OPTICAL RECEIVING APPARATUS AND FREQUENCY OFFSET COMPENSATION METHOD simplified abstract (NIPPON TELEGRAPH AND TELEPHONE CORPORATION)
Contents
- 1 OPTICAL RECEIVING APPARATUS AND FREQUENCY OFFSET COMPENSATION METHOD
- 1.1 Organization Name
- 1.2 Inventor(s)
- 1.3 OPTICAL RECEIVING APPARATUS AND FREQUENCY OFFSET COMPENSATION METHOD - A simplified explanation of the abstract
- 1.4 Simplified Explanation
- 1.5 Potential Applications
- 1.6 Problems Solved
- 1.7 Benefits
- 1.8 Potential Commercial Applications
- 1.9 Possible Prior Art
- 1.10 Unanswered Questions
- 1.11 Original Abstract Submitted
OPTICAL RECEIVING APPARATUS AND FREQUENCY OFFSET COMPENSATION METHOD
Organization Name
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor(s)
Ryo Koma of Musashino-shi (JP)
Junichi Kani of Musashino-shi (JP)
OPTICAL RECEIVING APPARATUS AND FREQUENCY OFFSET COMPENSATION METHOD - A simplified explanation of the abstract
This abstract first appeared for US patent application 18276985 titled 'OPTICAL RECEIVING APPARATUS AND FREQUENCY OFFSET COMPENSATION METHOD
Simplified Explanation
The patent application describes a reception unit that receives signal light generated by optically modulating transmission data, performs digital coherent reception, converts the signal light into an electric digital signal, and compensates for frequency offset in the digital signal.
- The reception unit operates within a specific frequency range and performs digital coherent reception by interfering the received signal light with local oscillation light.
- A frequency offset compensation unit estimates and compensates for frequency offset in the digital signal based on the frequency difference between the signal light and the local oscillation light.
Potential Applications
This technology can be applied in:
- Optical communication systems
- Digital signal processing units
Problems Solved
This technology solves the problem of frequency offset in digital signals, ensuring accurate reception and processing of data.
Benefits
- Improved signal reception and processing accuracy
- Enhanced performance of optical communication systems
Potential Commercial Applications
- Telecommunications industry
- Data transmission and reception systems
Possible Prior Art
There may be prior art related to frequency offset compensation in digital signal processing units, but specific examples are not provided in the abstract.
Unanswered Questions
How does the frequency offset compensation unit estimate the frequency offset amount?
The abstract does not detail the specific method or algorithm used by the frequency offset compensation unit to estimate the frequency offset amount.
What is the impact of the frequency offset compensation on overall system performance?
The abstract does not discuss the potential effects of the frequency offset compensation on the performance of the reception unit or the digital signal processing unit.
Original Abstract Submitted
A reception unit, in which a range of an electric band is in a range from −Be to +Be and Be >B/2 is satisfied, receives signal light of a symbol rate B generated by optically modulating transmission data, performs digital coherent reception by interfering the received signal light with the local oscillation light generated by the local oscillation light source, converts the signal light into an electric digital signal, and output the digital signal, and a frequency offset compensation unit provided in a digital signal processing unit estimates a frequency offset amount generated in the digital signal in a range of −B/2 or more and +B/2 or less in accordance with a frequency difference between the signal light and the local oscillation light, and perform frequency offset compensation for the digital signal on the basis of the estimated frequency offset amount to compensate the frequency offset amount in a range of −B/2 or more and +B/2 or less and compensate so as to remain the frequency offset amount of an integral multiple of the symbol rate B when the frequency offset amount is in a range of less than −B/2 and a range of more than +B/2.
