Advantage and Core Benefit
- High-resolution, high-speed optical pulse signals can be detected and AD-converted with a few low-resolution AD converters by means of non-linear spectral transformation and sparse principal component analysis.
- This technology can also be applied to digital coherent reception technology.
Background and Technology
AD conversion is a bottleneck in the use of high-resolution and high-speed optical signals in 5G and beyond 5G, as it is close to the limits of electrical processing.
With this technology, high-resolution (ex. 8-bit (2^8=256 gradations)) and high-speed (tens of GHz) optical pulse signals were converted into high-dimensional and diverse frequency components of the non-linear spectrum and analyzed by sparse principal component analysis, which was detected and AD-converted by several low-resolution AD converters (ex. three 4-bit AD converters ((2^4=16 (2^4 = 16 harmonic) x 3 dimensional).
Conventional interleaving, etc., is not required, which relaxes the processing performance required for the AD conversion process and enables high-resolution, high-speed, and inexpensive AD conversion.
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This technique can also be applied to digital coherent receiver technology by learning various pulses with known phase and amplitude by non-linear spectral transformation and sparse principal component analysis.
Patent
WO2021/261476
Researcher
Tsuyoshi KONISHI (Osaka University Graduate School of Engineering, Associate Professor)
Expectations
Licensing or joint research
Project No: HK-03461