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    METHOD FOR COMPUTING LIKELIHOODS IN PROCESS FOR RECONSTRUCTING DECODED INFORMATION WORDS
    22.
    发明申请
    METHOD FOR COMPUTING LIKELIHOODS IN PROCESS FOR RECONSTRUCTING DECODED INFORMATION WORDS 审中-公开

    公开(公告)号：US20180139010A1

    公开(公告)日：2018-05-17

    申请号：US15577612

    申请日：2016-06-15

    Applicant: MITSUBISHI ELECTRIC CORPORATION

    Inventor： Nicolas GRESSET

    IPC: H04L1/00 ,  H04L1/06 ,  H04L27/34

    CPC classification number: H04L1/0054 ,  H04L1/005 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/0606 ,  H04L1/0618 ,  H04L1/0631 ,  H04L1/0643 ,  H04L1/0668 ,  H04L25/067 ,  H04L27/34

    Abstract: Method for computing likelihoods in a process for reconstructing decoded information words from vectors of observations received from a wireless channel and generated from vectors of transmission symbols using a plurality of Alamouti matrix based Differential Space Time Block Codes coder. The method comprises applying an iterative reconstruction process, comprising, in a current iteration: receiving a vector of observations; determining, at least one vector of approximated scaling factors to be applied to the vector of observations; determining for each vector of approximated scaling factors a vector of approximated scaled equivalent channel models; and, computing likelihoods in the form of values representative of joint probabilities of obtaining the vector of observations knowing a vector of modulated symbols and a model of the wireless channel using each determined vector of approximated scaling factors and each determined vector of approximated scaled equivalent channel models.

    PRE-CODING METHOD AND PRE-CODING DEVICE
    23.
    发明申请
    PRE-CODING METHOD AND PRE-CODING DEVICE 审中-公开

    公开(公告)号：US20180123662A1

    公开(公告)日：2018-05-03

    申请号：US15854952

    申请日：2017-12-27

    Applicant: Sun Patent Trust

    Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

    IPC: H04B7/04 ,  H04B1/713

    CPC classification number: H04B7/0465 ,  H04B1/713 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0615 ,  H04L1/0009 ,  H04L1/005 ,  H04L1/0643 ,  H04L1/20

    Abstract: Disclosed is a precoding method comprising the steps of: generating a first coded block and a second coded block with use of a predetermined error correction block coding scheme; generating a first precoded signal z1 and a second precoded signal z2 by performing a precoding process, which corresponds to a matrix selected from among the N matrices F[i], on a first baseband signal s1 generated from the first coded block and a second baseband signal s2 generated from the second coded block, respectively; the first precoded signal z1 and the second precoded signal z2 satisfying (z1, z2)T=F[i] (s1, s2)T; and changing both of or one of a power of the first precoded signal z1 and a power of the second precoded signal z2, such that an average power of the first precoded signal z1 is less than an average power of the second precoded signal z2.

    TIERED CONTROL OF ITERATIVE MIMO RECEIVERS
    24.
    发明申请
    TIERED CONTROL OF ITERATIVE MIMO RECEIVERS 审中-公开

    公开(公告)号：US20180062709A1

    公开(公告)日：2018-03-01

    申请号：US15684685

    申请日：2017-08-23

    Applicant: QUALCOMM Incorporated

    Inventor： Chinmay VAZE ,  Prashant Udupa SRIPATHI ,  Supratik BHATTACHARJEE ,  Michael MCCLOUD

    IPC: H04B7/0413 ,  H04B7/08 ,  H04B17/29

    CPC classification number: H04B7/0413 ,  H04B7/08 ,  H04B17/29 ,  H04L1/005 ,  H04L25/03006 ,  H04L2025/03732 ,  H04L2025/03764

    Abstract: In order to balance the power requirements of a MIMO receiver with the gains that may be achieved through its use, an apparatus determines whether a current configuration of the UE supports iterative MIMO reception. When it is determined that the current configuration of the UE supports iterative MIMO reception, the apparatus determines whether at least one parameter of the received signal is within a corresponding target condition, respectively, for each of the at least one parameters, e.g., including determining whether a scheduling percentage meets a scheduling threshold and whether an error rate is within an error rate range. When both the configuration supports iterative MIMO reception and the signal parameter(s) meet the corresponding target condition(s), the apparatus uses the iterative MIMO receiver. If not, the apparatus uses a serial receiver.

    BASE STATION DEVICE AND TERMINAL DEVICE
    29.
    发明申请
    BASE STATION DEVICE AND TERMINAL DEVICE 审中-公开

    公开(公告)号：US20170279561A1

    公开(公告)日：2017-09-28

    申请号：US15506866

    申请日：2015-08-28

    Applicant: Sharp Kabushiki Kaisha

    Inventor： Osamu NAKAMURA ,  Jungo GOTO ,  Yasuhiro HAMAGUCHI

    IPC: H04L1/06 ,  H04B7/06 ,  H04B7/208 ,  H04L5/00

    CPC classification number: H04L1/0668 ,  H04B7/06 ,  H04B7/066 ,  H04B7/208 ,  H04J11/004 ,  H04L1/0003 ,  H04L1/005 ,  H04L5/0021 ,  H04L5/0023 ,  H04L5/0046 ,  H04L27/0008

    Abstract: Symbol replica precision is improved when symbol-level cancellation is performed in a receiver in downlink non-orthogonal access. Transmission is performed by multiplexing a transmission scheme by which excellent performance is obtained during demodulation and a transmission scheme by which excellent performance is obtained during decoding. Provided is a base station device including an addition unit that adds a number of signals the number exceeding a number of transmit antenna ports at the same time and the same frequency, and performing transmission from one or more transmit antenna ports. The addition unit adds signals generated by mutually different transmission schemes. Provided is a terminal device that receives a signal in which a number of signals generated by mutually different transmission schemes are added, the number exceeding a number of transmit antenna ports, at the same time and the same frequency. The terminal device includes a demodulation unit that performs demodulation processing for at least one of the mutually different transmission schemes, a replica generation unit that generates a symbol replica by using an output from the demodulation unit, and a cancellation unit that subtracts the symbol replica from the received signal.

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