Methods and apparatuses to improve reception of direct detection optical signals
US9621391B2 · kind B2 · utility
2Cited by
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21Claims
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Key dates
| Filing date | Apr 14, 2014 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Apr 14, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2626
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
System and method embodiments are provided for improving reception of direct detection optical signals. In an embodiment, a method for optical transmission includes bit loading and power loading, with a digital signal processor (DSP), transmission bits of an orthogonal frequency-division multiplexing (OFDM) signal; calculating, with the DSP, a signal-signal beat interference (SSBI) component of the bit and power loaded OFDM signal by modulating each subcarrier with a symbol; and subtracting, with the DSP, the calculated SSBI component from the bit and power loaded OFDM signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.