公开(公告)号：US10128980B2

公开(公告)日：2018-11-13

申请号：US15494366

申请日：2017-04-21

Applicant: Inphi Corporation

Inventor： Benjamin P. Smith ,  Arash Farhoodfar

IPC: H04L1/00 ,  H03M13/29 ,  H04B10/69 ,  H04B10/532 ,  H04B10/516 ,  H04B10/54

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.

公开(公告)号：US10110252B2

公开(公告)日：2018-10-23

申请号：US15378904

申请日：2016-12-14

Applicant: INPHI CORPORATION

Inventor： Arash Farhoodfar ,  Frank R. Kschischang ,  Benjamin P. Smith ,  Andrew Hunt

IPC: H03M13/00 ,  H03M13/27 ,  H04L1/00

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.

公开(公告)号：US09998146B2

公开(公告)日：2018-06-12

申请号：US15337136

申请日：2016-10-28

Applicant: INPHI CORPORATION

Inventor： Andre Szczepanek ,  Arash Farhoodfar ,  Sudeep Bhoja ,  Sean Batty ,  Shaun Lytollis

IPC: H03M13/01 ,  H03M13/15

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).

公开(公告)号：US11272270B1

公开(公告)日：2022-03-08

申请号：US17011941

申请日：2020-09-03

Applicant: INPHI CORPORATION

Inventor： Whay Sing Lee ,  Arash Farhoodfar ,  Volodymyr Shvydun ,  Michael Duckering

IPC: H04B10/516 ,  H04J14/02 ,  H04L1/00 ,  H04Q11/00

Abstract: The present invention is direct to data communication. In a specific embodiment, multiple independent data streams, which are at a first data rate, are transcoded by separate communication pipelines into data blocks. The data blocks, associated with these separate and independent data streams, are multiplexed with alignment markers to generate an output data stream. The output data stream is transmitted at a second data rate, which is higher than the first data rate.

公开(公告)号：US10944430B2

公开(公告)日：2021-03-09

申请号：US16733815

申请日：2020-01-03

Applicant: INPHI CORPORATION

Inventor： Arash Farhoodfar ,  Frank R. Kschischang ,  Benjamin P. Smith ,  Andrew Hunt

IPC: H03M13/00 ,  H03M13/27 ,  H04L1/00

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.

公开(公告)号：US10887049B2

公开(公告)日：2021-01-05

申请号：US16444421

申请日：2019-06-18

Applicant: INPHI CORPORATION

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

IPC: H04L1/00 ,  H03M13/19 ,  H03M13/25 ,  H03M13/29 ,  H04L1/06 ,  H04L27/26

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.

公开(公告)号：US10749629B2

公开(公告)日：2020-08-18

申请号：US16403408

申请日：2019-05-03

Applicant: INPHI CORPORATION

Inventor： Jamal Riani ,  Benjamin P. Smith ,  Volodymyr Shvydun ,  Sudeep Bhoja ,  Arash Farhoodfar

IPC: H04L1/00 ,  H04B14/02 ,  H03M13/29

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.

公开(公告)号：US10659192B2

公开(公告)日：2020-05-19

申请号：US16451986

申请日：2019-06-25

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.

公开(公告)号：US10587452B2

公开(公告)日：2020-03-10

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

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.

公开(公告)号：US09787431B2

公开(公告)日：2017-10-10

申请号：US15230319

申请日：2016-08-05

Applicant: INPHI CORPORATION

Inventor： Juan-Carlos Calderon ,  Jean-Michel Caia ,  Arash Farhoodfar ,  Arun Zarabi

IPC: H04B10/00 ,  H04B10/08 ,  H04L1/00 ,  H04B10/516 ,  H03M13/15 ,  H03M13/27 ,  H04B10/27 ,  H04J14/02 ,  H04B10/07

CPC classification number: H04L1/0042 ,  H03M13/1515 ,  H03M13/27 ,  H04B10/07 ,  H04B10/27 ,  H04B10/516 ,  H04J3/1652 ,  H04J14/02 ,  H04J2203/0089 ,  H04L1/0057 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/0086

Abstract: There are various drawbacks by using existing OTN (Optical Transport Network) frames for communication between OTN cards. Such drawbacks might for example include high latency, low robustness, and/or high coding rate. According to embodiments of the present disclosure, systems and methods are provided for modifying an OTN frame (or creating a new frame with data from the OTN frame) prior to transmission by an OTL (Optical channel Transport Lane) in order to address some or all of the foregoing drawbacks. Note that this embodiment can make use of existing hardware (e.g. hardware used for generating the OTN frame, and the OTL used for transmission).