公开(公告)号：US20170324510A1

公开(公告)日：2017-11-09

申请号：US15659176

申请日：2017-07-25

Applicant: SONY CORPORATION

Inventor： Junge QI ,  Joerg ROBERT ,  Jan ZOELLNER ,  Lothar STADELMEIER ,  Nabil LOGHIN

IPC: H04L1/00 ,  H04L1/18 ,  H03M13/00 ,  H04L12/18

CPC classification number: H04L1/0033 ,  H03M13/6306 ,  H03M13/6519 ,  H03M13/6522 ,  H03M13/6541 ,  H03M13/6552 ,  H04L1/0042 ,  H04L1/0047 ,  H04L1/007 ,  H04L1/0086 ,  H04L1/1819 ,  H04L1/1893 ,  H04L12/189

Abstract: A control device for use in a broadcast system includes a broadcast controller that controls a broadcast transmitter of the broadcast system that broadcasts signals in a coverage area for reception by terminals including a broadcast receiver and a broadband receiver, and a broadband controller that controls a broadband server of a broadband system that provides redundancy data to terminals within the coverage area. The broadband controller is configured to control the provision of redundancy data by the broadband server for use by one or more terminals which use the redundancy data together with broadcast signals received via said broadcast system for recovering content received within the broadcast signals and/or provided via the broadband system.

公开(公告)号：US20170310343A1

公开(公告)日：2017-10-26

申请号：US15645924

申请日：2017-07-10

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung-Ik PARK ,  Sun-Hyoung KWON ,  Jae-Young LEE ,  Heung-Mook KIM ,  Nam-Ho HUR

IPC: H03M13/27 ,  H04L1/00 ,  H03M13/11 ,  H03M13/00 ,  H03M13/25 ,  H04L27/34

CPC classification number: H03M13/1165 ,  H03M13/255 ,  H03M13/2792 ,  H03M13/616 ,  H03M13/6552 ,  H04L1/0041 ,  H04L1/0042 ,  H04L1/0057 ,  H04L1/0071 ,  H04L27/3422

Abstract: A modulator and a modulation method using a non-uniform 16-symbol signal constellation are disclosed. The modulator includes a memory and a processor. The memory receives a codeword corresponding to a low-density parity check (LDPC) code having a code rate of 4/15. The processor maps the codeword to 16 symbols of the non-uniform 16-symbol signal constellation on a 4-bit basis.

公开(公告)号：US20170302398A1

公开(公告)日：2017-10-19

申请号：US15637577

申请日：2017-06-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jinrong Yin ,  Weiyang Wang

IPC: H04J14/04 ,  H04L27/02 ,  H04L25/03 ,  H04L1/00 ,  H04B10/2581 ,  H04L27/36 ,  G02B6/38

CPC classification number: H04J14/04 ,  G02B6/38 ,  H04B10/2581 ,  H04L1/0042 ,  H04L25/03343 ,  H04L27/02 ,  H04L27/367

Abstract: The present disclosure provides a data transmission method including: receiving a first-mode optical signal from a first port corresponding to a first port number; converting, according to a correspondence between the first port number and a first mode group number, the received first-mode optical signal into a second-mode optical signal carried in a first mode group identified by the first mode group number, where the second-mode optical signal carried in the first mode group identified by the first mode group number includes an optical signal in one or more modes; and outputting the second-mode optical signal obtained by means of conversion.

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).

公开(公告)号：US20170290007A1

公开(公告)日：2017-10-05

申请号：US15478057

申请日：2017-04-03

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung-Ik PARK ,  Sun-Hyoung KWON ,  Jae-Young LEE ,  Bo-Mi LIM ,  Heung-Mook KIM ,  Nam-Ho HUR

IPC: H04W72/04 ,  H04J3/16 ,  H04L1/00 ,  H04L12/18

CPC classification number: H04L1/0042 ,  H04L1/0043 ,  H04L1/0052 ,  H04L1/0057 ,  H04L1/0071 ,  H04L1/0075 ,  H04L12/1877 ,  H04L12/189 ,  H04L2001/0093

Abstract: An apparatus and method for generating a broadcast signal frame for signaling a time interleaving mode are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal; a power normalizer configured to perform power-normalizing for reducing the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing time interleaving after performing the power-normalizing; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling a time interleaving mode corresponding to the time interleaver for each of physical layer pipes (PLPs).

公开(公告)号：US20170288902A1

公开(公告)日：2017-10-05

申请号：US15629181

申请日：2017-06-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fredrik Rusek ,  Sha Hu

IPC: H04L25/03 ,  H04L27/34 ,  H04B17/336 ,  H04L1/00 ,  H04M1/725 ,  H04W76/04

CPC classification number: H04L25/03203 ,  H04B17/336 ,  H04L1/0042 ,  H04L25/03968 ,  H04L27/3461 ,  H04M1/72519 ,  H04W76/25

Abstract: An apparatus including a processor configured to receive a digital communication signal having a plurality of transmitted layers. The processor is configured to determine an estimated channel matrix based on the digital communication signal, determine a first estimated transmitted symbol vector and a mean square error matrix based on a linear analysis of the received digital communication signal. A first set of bit LLR are determined based on a LMMSE type detector and a second set of bit LLR are determined based on a novel simplified tree search process. The two sets of bit LLR are then combined and used to detect the data in the received communication signal. The simplified tree search process uses a specially formed channel shortening process to determine a set of shortened channel correlation matrices that allow the second set of bit LLR to be determined using an alternative marginalized tree search process.

公开(公告)号：US09775157B2

公开(公告)日：2017-09-26

申请号：US14964506

申请日：2015-12-09

Applicant: Link Labs, Inc.

Inventor： Ricardo Luna, Jr. ,  Adrian Sapio ,  Richard Kevin Sawyer, Jr.

IPC: H04W72/04 ,  H04W52/26 ,  H04W52/20 ,  H04L1/00 ,  H04W52/02 ,  H04W52/24 ,  H04W52/14 ,  H04W24/08

CPC classification number: H04W72/0473 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0042 ,  H04W24/08 ,  H04W52/0245 ,  H04W52/0261 ,  H04W52/0277 ,  H04W52/146 ,  H04W52/20 ,  H04W52/242 ,  H04W52/265 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/166

Abstract: A method, of operating an end node to wirelessly communicate with a central node, includes: receiving wirelessly a current instance of a beacon signal periodically-transmitted from the central node; measuring a received power, PB-RX, of the beacon signal; reading locally-stored values of PB-TX and G representing a presumed transmitted power of the beacon signal and a performance goal of the end node, respectively; determining, for a given channel, a path loss, PL, based on the PB-RX and the PB-TX; and adaptively setting an energy level, EN-TX, of a forthcoming message to be transmitted from the end node by adaptively determining, based on PL and G, at least two of: a level of power, PN-TX; a forward error correction coding rate, c; and a spreading factor, SF; and a modulation format, M.

公开(公告)号：US20170257187A1

公开(公告)日：2017-09-07

申请号：US15599873

申请日：2017-05-19

Applicant: LG ELECTRONICS INC.

Inventor： Yonghak SUH ,  Sangchul MOON ,  Jongwoong SHIN ,  Woosuk KO ,  Sungryong HONG

IPC: H04L1/00

CPC classification number: H04L27/2649 ,  H03M13/1102 ,  H03M13/2792 ,  H04L1/0009 ,  H04L1/0023 ,  H04L1/0042 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0058 ,  H04L1/0065 ,  H04L1/0071 ,  H04L5/0007 ,  H04L27/12

Abstract: A method for transmitting broadcast signals, the method includes encoding service data; parity interleaving parity bits of the encoded service data; group-wise interleaving bit groups included in the parity interleaved service data according to a permutation order; block interleaving the group-wise interleaved bit groups with a set including a number of bit groups, wherein the number of bit groups included in the set corresponds to a modulation order, wherein the block interleaving includes row-wise writing bits of the group-wise interleaved bit groups in the set; and column-wise reading 1 bit from each row of the set; building at least one signal frame including the block interleaved service data; modulating data in the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme; and transmitting the broadcast signals having the modulated data.

公开(公告)号：US20170250780A1

公开(公告)日：2017-08-31

申请号：US15420807

申请日：2017-01-31

Applicant: FUJITSU LIMITED

Inventor： Yi Ge ,  Hisao Nakashima ,  Takeshi Hoshida

IPC: H04L1/00 ,  H04L5/00

CPC classification number: H04L1/007 ,  H04B10/07953 ,  H04B10/2507 ,  H04L1/0042 ,  H04L5/0005 ,  H04L5/006 ,  H04L27/2697 ,  H04L27/3405 ,  H04L27/362 ,  H04L27/367

Abstract: An error correction circuit includes a first error correction circuit, a second error correction circuit and a controller. The first error correction circuit performs an error correction in a first correction scheme. The second error correction circuit performs an error correction in a second correction scheme. A correction performance of the second correction scheme is lower than a correction performance of the first correction scheme. The controller makes the first error correction circuit perform error correction of a received signal when a capacity of the received signal is smaller than or equal to a processing capacity of the first error correction circuit, and makes the first error correction circuit and the second error correction circuit perform error correction of the received signal when the capacity of the received signal is larger than the processing capacity of the first error correction circuit.

公开(公告)号：US09749089B2

公开(公告)日：2017-08-29

申请号：US14931959

申请日：2015-11-04

Applicant: Mitsubishi Electric Research Laboratories, Inc.

Inventor： David Millar ,  Toshiaki Koike-Akino ,  Keisuke Kojima ,  Kieran Parsons

IPC: H03M13/00 ,  H04L1/00

CPC classification number: H04L1/0045 ,  H04L1/0042 ,  H04L1/0057 ,  H04L1/0061 ,  H04L25/067 ,  H04L27/38

Abstract: A method receives the symbol transmitted over a channel, selects, from a constellation of codewords, a first codeword neighboring the received symbol and a set of second codewords neighboring the first codeword, and determines a relative likelihood of each second codeword being the transmitted symbol with respect to a likelihood of the first codeword being the transmitted symbol. Next, the method determines an approximation of a log-likelihood ratio (LLR) of each data bit in the received symbol as a log of a ratio of a sum of the relative likelihoods of at least some of the second codewords having the same value of the data bit to a sum of the relative likelihoods of at least some of the second codewords having different value of the data bit and decodes the received symbol using the LLR of each data bit.