公开(公告)号：EP2854318A4

公开(公告)日：2015-05-27

申请号：EP13794325

申请日：2013-05-21

Applicant: PANASONIC IP CORP AMERICA

Inventor： OUCHI MIKIHIRO ,  KIMURA TOMOHIRO ,  MURAKAMI YUTAKA

IPC: H04J99/00 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/10 ,  H04J11/00

CPC classification number: H04L5/0032 ,  H04B7/022 ,  H04B7/024 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0615 ,  H04B7/0619 ,  H04B7/0848 ,  H04B7/086 ,  H04B7/0891 ,  H04B7/10 ,  H04J11/00 ,  H04L5/005 ,  H04L12/1868 ,  H04W72/005 ,  H04W72/08

Abstract: When transmitting signals from a plurality of base stations (broadcasting stations), the base stations include at least a first base station having a first antenna with a first polarization and a second base station having a second antenna with a second polarization that is different from the first polarization. Then, when the first base station transmits a signal from the first antenna having the first polarization, the second base station transmits the same signal as the first antenna of the first base station from a second antenna having the second polarization, at the same time.

公开(公告)号：EP2755339A4

公开(公告)日：2015-04-15

申请号：EP12830859

申请日：2012-09-06

Applicant: PANASONIC IP CORP AMERICA

Inventor： MURAKAMI YUTAKA ,  KIMURA TOMOHIRO ,  OUCHI MIKIHIRO

IPC: H04J99/00 ,  H04B7/04

CPC classification number: H04B7/0469 ,  H04B1/0057 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/0456 ,  H04B7/0465 ,  H04L5/00 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/0048 ,  H04L25/0222 ,  H04L27/20 ,  H04L27/34 ,  H04L27/36

Abstract: A transmission method for simultaneously transmitting a first modulated signal and a second modulated signal at the same frequency includes performing precoding on both signals using a fixed precoding matrix and regularly changing the phase of at least one of the signals. In this method, the power ratio between a plurality of signals transmitted from a plurality of antennas at the same frequency and at the same time differs from the power ratio between a plurality of pilot signals transmitted from the plurality of antennas at the same frequency and at the same time, whereby the accuracy of channel estimation by a reception device is improved.

公开(公告)号：EP2701327A4

公开(公告)日：2015-03-11

申请号：EP12774704

申请日：2012-04-18

Applicant: PANASONIC IP CORP AMERICA

Inventor： MURAKAMI YUTAKA ,  KIMURA YUTAKA ,  OUCHI MIKIHIRO

IPC: H04J99/00 ,  H04B7/04

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.

公开(公告)号：EP2615757A4

公开(公告)日：2015-01-14

申请号：EP11823260

申请日：2011-09-08

Applicant: PANASONIC IP CORP AMERICA

Inventor： MURAKAMI YUTAKA ,  KIMURA TOMOHIRO ,  OUCHI MIKIHIRO

IPC: H04B7/04 ,  H04L1/06 ,  H04L5/26 ,  H04L25/03 ,  H04L27/34

CPC classification number: H04L27/265 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/046 ,  H04B7/0473 ,  H04B7/0617 ,  H04B7/0697 ,  H04B7/08 ,  H04B7/086 ,  H04B7/12 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0045 ,  H04L1/0047 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/06 ,  H04L1/0643 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0226 ,  H04L25/0248 ,  H04L25/03942 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/3405 ,  H04L2001/0093

Abstract: Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

公开(公告)号：EP2701326A4

公开(公告)日：2014-08-27

申请号：EP12774322

申请日：2012-04-18

Applicant: PANASONIC IP CORP AMERICA

Inventor： MURAKAMI YUTAKA ,  KIMURA TOMOHIRO ,  OUCHI MIKIHIRO

IPC: H04B7/04 ,  H04B7/06 ,  H04J11/00

CPC classification number: H04B7/0697 ,  H04B7/0413 ,  H04B7/0426 ,  H04B7/0456 ,  H04B7/046 ,  H04B7/0465 ,  H04B7/0617 ,  H04B7/0682 ,  H04B7/0862 ,  H04J11/0033 ,  H04L25/0391 ,  H04W52/42

Abstract: A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation sheme. The transmission method applies precoding on both signals using a fixed precoding matrix, applies different power change to each signal, and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.