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公开(公告)号：US09654253B1
公开(公告)日：2017-05-16
申请号：US14976100
申请日：2015-12-21
Applicant: INPHI CORPORATION
Inventor： Benjamin P. Smith , Arash Farhoodfar
IPC: H04B10/50 , H04L1/00 , H04B10/516 , H04B10/54
CPC classification number: H04L1/0044 , H03M13/2906 , H04B10/50 , H04B10/516 , H04B10/5161 , H04B10/532 , H04B10/541 , H04B10/697 , H04L1/0041 , H04L1/0045 , H04L1/0058 , H04L1/006 , H04L1/0065
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 256 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：US10944620B2
公开(公告)日：2021-03-09
申请号：US16930114
申请日：2020-07-15
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：US20200220659A1
公开(公告)日：2020-07-09
申请号：US16824261
申请日：2020-03-19
Applicant: INPHI CORPORATION
Inventor： Jamal RIANI , Benjamin SMITH , Volodymyr SHVYDUN , Srinivas SWAMINATHAN , Arash Farhoodfar
IPC: H04L1/00
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 processes an interleaved data stream and 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：US10374752B2
公开(公告)日：2019-08-06
申请号：US15693294
申请日：2017-08-31
Applicant: INPHI CORPORATION
Inventor： Benjamin 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：US10205625B1
公开(公告)日：2019-02-12
申请号：US15987808
申请日：2018-05-23
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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Patent Agency Ranking
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.
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公开(公告)号：US10903937B2
公开(公告)日：2021-01-26
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：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.
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公开(公告)号：US10567005B2
公开(公告)日：2020-02-18
申请号：US16134311
申请日：2018-09-18
Applicant: INPHI CORPORATION
Inventor： Arash Farhoodfar , Frank R. Kschischang , Benjamin P. Smith , Andrew Hunt
Abstract: Multiple data permutation operations in respective different dimensions are used to provide an overall effective data permutation using smaller blocks of data in each permutation than would be used in directly implementing the overall permutation in a single permutation operation. Data that has been permuted in one permutation operation is block interleaved, and the interleaved data is then permuted in a subsequent permutation operation. A matrix transpose is one example of block interleaving that could be applied between permutation operations.
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公开(公告)号：US10461781B2
公开(公告)日：2019-10-29
申请号：US16011483
申请日：2018-06-18
Applicant: INPHI CORPORATION
Inventor： Benjamin Smith , Arash Farhoodfar , Stewart Crozier , Frank R. Kschischang , Andrew Hunt
Abstract: For some applications such as high-speed communication over short-reach links, the complexity and associated high latency provided by existing modulators may be unsuitable. According to an aspect, the present disclosure provides a modulator that can reduce latency for applications such as 40 G/100 G communication over copper cables or SMF. The modulator has a symbol mapper for mapping a bit stream into symbols, and a multi-level encoder including an inner encoder and an outer encoder for encoding only a portion of the bit stream. In some implementations, the multi-level encoder is configured such that an information block size of the inner encoder is small and matches a field size of the outer encoder. Therefore, components that would be used to accommodate larger block sizes can be omitted. The effect is that complexity and latency can be reduced. According to another aspect, the present disclosure provides a demodulator that is complementary to the modulator.
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