公开(公告)号：US10236994B2

公开(公告)日：2019-03-19

申请号：US15836603

申请日：2017-12-08

Applicant: INPHI CORPORATION

Inventor： Benjamin P. Smith ,  Jamal Riani ,  Sudeep Bhoja ,  Arash Farhoodfar ,  Vipul Bhatt

IPC: H04B10/69 ,  H04B10/58 ,  H04B10/2507 ,  H04B10/516 ,  H04B10/00

Abstract: A circuit and method for mitigating multi-path interference in direct detection optical systems is provided. Samples of an optical signal having a pulse amplitude modulated (PAM) E-field are processed by generating a PAM level for each sample. For each sample, the sample is subtracted from the respective PAM level to generate a corresponding error sample. The error samples are lowpass filtered to produce estimates of multi-path interference (MPI). For each sample, one of the estimates of MPI is combined with the sample to produce an interference-mitigated sample.

公开(公告)号：US09876581B2

公开(公告)日：2018-01-23

申请号：US15040812

申请日：2016-02-10

Applicant: INPHI CORPORATION

Inventor： Benjamin P. Smith ,  Jamal Riani ,  Sudeep Bhoja ,  Arash Farhoodfar ,  Vipul Bhatt

IPC: H04B10/69 ,  H04B10/58 ,  H04B10/2507 ,  H04B10/516

CPC classification number: H04B10/58 ,  H04B10/00 ,  H04B10/2507 ,  H04B10/5161 ,  H04B10/6971

Abstract: A circuit and method for mitigating multi-path interference in direct detection optical systems is provided. Samples of an optical signal having a pulse amplitude modulated (PAM) E-field are processed by generating a PAM level for each sample. For each sample, the sample is subtracted from the respective PAM level to generate a corresponding error sample. The error samples are lowpass filtered to produce estimates of multi-path interference (MPI). For each sample, one of the estimates of MPI is combined with the sample to produce an interference-mitigated sample.

公开(公告)号：US10601518B2

公开(公告)日：2020-03-24

申请号：US16259760

申请日：2019-01-28

Applicant: INPHI CORPORATION

Inventor： Benjamin P. Smith ,  Jamal Riani ,  Sudeep Bhoja ,  Arash Farhoodfar ,  Vipul Bhatt

IPC: H04B10/69 ,  H04B10/58 ,  H04B10/2507 ,  H04B10/54 ,  H04B10/516 ,  H04B10/00

Abstract: A circuit and method for mitigating multi-path interference in direct detection optical systems is provided. Samples of an optical signal having a pulse amplitude modulated (PAM) E-field are processed by generating a PAM level for each sample. For each sample, the sample is subtracted from the respective PAM level to generate a corresponding error sample. The error samples are lowpass filtered to produce estimates of multi-path interference (MPI). For each sample, one of the estimates of MPI is combined with the sample to produce an interference-mitigated sample.

公开(公告)号：US20170230119A1

公开(公告)日：2017-08-10

申请号：US15040812

申请日：2016-02-10

Applicant: INPHI CORPORATION

Inventor： Benjamin P. Smith ,  Jamal Riani ,  Sudeep Bhoja ,  Arash Farhoodfar ,  Vipul Bhatt

IPC: H04B10/58 ,  H04B10/516

CPC classification number: H04B10/58 ,  H04B10/00 ,  H04B10/2507 ,  H04B10/5161 ,  H04B10/6971

Abstract: A circuit and method for mitigating multi-path interference in direct detection optical systems is provided. Samples of an optical signal having a pulse amplitude modulated (PAM) E-field are processed by generating a PAM level for each sample. For each sample, the sample is subtracted from the respective PAM level to generate a corresponding error sample. The error samples are lowpass filtered to produce estimates of multi-path interference (MPI). For each sample, one of the estimates of MPI is combined with the sample to produce an interference-mitigated sample.