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公开(公告)号：US20210075516A1
公开(公告)日：2021-03-11
申请号：US16951653
申请日：2020-11-18
Applicant: INPHI CORPORATION
Inventor： Benjamin P. SMITH , Jamal RIANI , Sudeep BHOJA , Arash FARHOODFAR , Vipul BHATT
IPC: H04B10/58 , H04B10/2507 , H04B10/69 , 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.
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公开(公告)号：US20200343999A1
公开(公告)日：2020-10-29
申请号：US16928821
申请日：2020-07-14
Applicant: INPHI CORPORATION
Inventor： Jamal RIANI , Benjamin SMITH , Volodymyr SHVYDUN , Sudeep BHOJA , Arash FARHOODFAR
Abstract: The present invention is directed to data communication systems and techniques thereof. More specifically, embodiments of the present invention provide an FEC encoder that generates parity symbols that are embedded into FEC blocks. An FEC decoder determines whether to perform error correction based on the parity symbols. When performing error correction, the decoder selects a worst symbol from a segment of symbols, and the worst symbol is corrected. There are other embodiments as well.
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公开(公告)号：US20190132185A1
公开(公告)日：2019-05-02
申请号：US16232821
申请日：2018-12-26
Applicant: INPHI CORPORATION
Inventor： Arash FARHOODFAR , Jitendra SWARNKAR , Michael DUCKERING , Andre SCZAPANEK , Scott FELLER , Shaun LYTOLLIS
Abstract: The present invention is directed to data communication. In certain embodiments, the present invention provides switching mechanism for choosing between redundant communication links. Data received from a first set of communication links are processed to have alignment markers removed, and first figure of merit value is determined based on the data without alignment markers. Similarly, a second figure of merit value is determined for the data received from the second set of communication links. A switch selects between the first set of communication links and the second set of communication links based on their respective figure of merit values. Alignment markers are inserted into the data transmitted through the selected set of data links. There are other embodiments as well.
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公开(公告)号：US20200244394A1
公开(公告)日：2020-07-30
申请号：US16853514
申请日：2020-04-20
Applicant: INPHI CORPORATION
Inventor： Benjamin P. SMITH , Arash FARHOODFAR
IPC: H04L1/00 , H04B10/50 , H04B10/516 , H04B10/54 , H03M13/29 , H04B10/532 , H04B10/69
Abstract: An optical module processes first FEC (Forward Error Correction) encoded data produced by a first FEC encoder. The optical module has a second FEC encoder for further coding a subset of the first FEC encoded data to produce second FEC encoded data. The optical module also has an optical modulator for modulating, based on a combination of the second FEC encoded data and a remaining portion of the first FEC encoded data that is not further coded, an optical signal for transmission over an optical channel. The second FEC encoder is an encoder for an FEC code that has a bit-level trellis representation with a number of states in any section of the bit-level trellis representation being less than or equal to 64 states. In this manner, the second FEC encoder has relatively low complexity (e.g. relatively low transistor count) that can reduce power consumption for the optical module.
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公开(公告)号：US20200228139A1
公开(公告)日：2020-07-16
申请号：US16828559
申请日：2020-03-24
Applicant: INPHI CORPORATION
Inventor： Andre SZCZEPANEK , Arash FARHOODFAR , Sudeep BHOJA , Sean BATTY , Shaun LYTOLLIS
Abstract: Embodiments relate to the emulation of the effect of Forward Error Correction (FEC) codes, e.g., GF10 Reed Solomon (RS) FEC codes, on the bit error ratio (BER) of received Pseudo-Random Binary Sequences (PRBS) patterns. In particular, embodiments group errors into RS-FEC symbols and codewords in order to determine if the errors are correctable. By emulating the error correction capabilities of FEC codes in order to determine which errors are correctable by the code, embodiments afford a more accurate representation of the post-FEC BER of RS FEC codes from links carrying PRBS patterns. This FEC code emulation provides error correction statistics, for stand-alone use or for error correction in connection with Bit Error Rate Testers (BERTs).
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Patent Agency Ranking
公开(公告)号：US20200169448A1
公开(公告)日：2020-05-28
申请号：US16775130
申请日：2020-01-28
Applicant: INPHI CORPORATION
Inventor： Arash FARHOODFAR , Jitendra SWARNKAR , Michael DUCKERING , Andre SCZAPANEK , Scott FELLER , Shaun LYTOLLIS
IPC: H04L29/08 , G06F11/20 , H04L12/427 , H04L1/22 , H04L12/24 , H04L12/40 , H04W28/06 , H04W28/04 , H04L12/26
Abstract: The present invention is directed to data communication. In certain embodiments, the present invention provides switching mechanism for choosing between redundant communication links. Data received from a first set of communication links are processed to have alignment markers removed, and first figure of merit value is determined based on the data without alignment markers. Similarly, a second figure of merit value is determined for the data received from the second set of communication links. A switch selects between the first set of communication links and the second set of communication links based on their respective figure of merit values. Alignment markers are inserted into the data transmitted through the selected set of data links. There are other embodiments as well.
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公开(公告)号：US20200076720A1
公开(公告)日：2020-03-05
申请号：US16115291
申请日：2018-08-28
Applicant: INPHI CORPORATION
Inventor： Jamal RIANI , Arash FARHOODFAR , Sudeep BHOJA , Tarun SETYA
Abstract: The present invention is directed to data communication systems and techniques thereof. More specifically, embodiments of the present invention provide a retimer module that includes plurality of communication lanes for interfacing with a host system and a line system. The retimer module includes a link monitor and cross point sections. The retimer also includes a management interface module. There are other embodiments as well.
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公开(公告)号：US20190305884A1
公开(公告)日：2019-10-03
申请号：US16444421
申请日：2019-06-18
Applicant: INPHI CORPORATION
Inventor： Benjamin P. SMITH , Jamal RIANI , Arash FARHOODFAR , Sudeep BHOJA
Abstract: The present invention relates to data communication systems and methods thereof. More specifically, embodiments of the present invention provide a data transmission method. Data are encoded with staircase encoder, and staircase coded blocks are first interleaved then combined into outer code frames. Code frames additionally include sync words and padding bits. A second interleaving is applied to the bits of the code frames, and Hamming encoding is performed on the output of the second interleaver. Hamming codewords are Gray-mapped to dual-polarized quadrature-amplitude-modulation (DP-QAM) symbols, and a third interleaving of the symbols from a set of successive Hamming codewords is performed. Pilot symbols are inserted periodically into the stream of DP-QAM symbols. There are other embodiments as well.
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公开(公告)号：US20190068322A1
公开(公告)日：2019-02-28
申请号：US15693294
申请日：2017-08-31
Applicant: Inphi Corporation
Inventor： Benjamin SMITH , Jamal RIANI , Arash FARHOODFAR , Sudeep BHOJA
CPC classification number: H04L1/0057 , H03M13/19 , H03M13/251 , H03M13/2906 , H04L1/0041 , H04L1/0058 , H04L1/0059 , H04L1/0064 , H04L1/0071 , H04L1/0643 , H04L27/2627
Abstract: The present invention relates to data communication systems and methods thereof. More specifically, embodiments of the present invention provide a data transmission method. Data are encoded with staircase encoder, and staircase coded blocks are first interleaved then combined into outer code frames. Code frames additionally include sync words and padding bits. A second interleaving is applied to the bits of the code frames, and Hamming encoding is performed on the output of the second interleaver. Hamming codewords are Gray-mapped to dual-polarized quadrature-amplitude-modulation (DP-QAM) symbols, and a third interleaving of the symbols from a set of successive Hamming codewords is performed. Pilot symbols are inserted periodically into the stream of DP-QAM symbols. There are other embodiments as well.
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公开(公告)号：US20180262209A1
公开(公告)日：2018-09-13
申请号：US15981844
申请日：2018-05-16
Applicant: INPHI CORPORATION
Inventor： Andre SZCZEPANEK , Arash FARHOODFAR , Sudeep BHOJA , Sean BATTY , Shaun LYTOLLIS
CPC classification number: H03M13/015 , H03M13/1515 , H03M13/158
Abstract: Embodiments relate to the emulation of the effect of Forward Error Correction (FEC) codes, e.g., GF10 Reed Solomon (RS) FEC codes, on the bit error ratio (BER) of received Pseudo-Random Binary Sequences (PRBS) patterns. In particular, embodiments group errors into RS-FEC symbols and codewords in order to determine if the errors are correctable. By emulating the error correction capabilities of FEC codes in order to determine which errors are correctable by the code, embodiments afford a more accurate representation of the post-FEC BER of RS FEC codes from links carrying PRBS patterns. This FEC code emulation provides error correction statistics, for stand-alone use or for error correction in connection with Bit Error Rate Testers (BERTs).
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