Sun Patent Trust

Panasonic Intellectual Property Corporation of America

Panasonic Corporation

Sharp Kabushiki Kaisha Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Apple Inc.

Semiconductor Energy Laboratory Co., Ltd.

Panasonic Holdings Corporation

Other

Sun Patent Trust Tego

Tomohiro Kimura

Mikihiro Ouchi

Yutaka Murakami

Hiroyuki Motozuka

Yoshinobu Matsumura

Yoshio Urabe

Mihail Petrov

Yasuo Harada

Noritaka Iguchi

Naganori Shirakata

Yasuhiro Sugita

Koichiro Tanaka

Kenichi Mori

Kenichiro Hayashi

Frank Herrmann

Takayuki Sotoyama

Hiroshi Hayashino

Jean Mugiraneza

Naoki Adachi

Peter Klenner

Kohji Fujiwara

Hideki Nakahara

Shuya Hosokawa

Yukihiro Omoto

Yasuhiro Uno

Hiroyuki Ogawa

Hisashi Watanabe

Hidekazu Miyairi

Shutai Okamura

Yoshitaka Yamamoto

Hisao Koga

Kazuaki Takahashi

Takenori Sakamoto

Kohhei Tanaka

Hitoshi Takai

Masafumi Ueno

Akio Kurobe

Seiichi Uchida

Koji Takinami

Yuji Igata

Takayuki Nishiyama

Sadashi Kageyama

Akihiro Tatsuta

Shigeto Yoshida

Hiroki Furukawa

Masahiro Maki

Akira Kisoda

Mutsuhiko Oishi

Toshiyuki Wakisaka

Shigeo Yoshida

Naoya Shibaike

Yuji Nakai

Hiroshi Oue

Yasuo Nagaishi

Yasuhiro Jinbo

Koji Dairiki

Toshihiro Yanagi

Kazuya Ueda

Toshiyuki Isa

Yuji Tanaka

Atsushi Hirose

Hiroshi Fukushima

Youhei Nakanishi

Kazutoshi Kida

Shinji Yamagishi

Makoto Nakazawa

Ryuzo Yuki

Masayuki Kanehiro

Keiichi Yamamoto

Kenji Miyanaga

Ippei Kanno

Hiroshi Matsukizono

Miho Yamada

Ryo Yonebayashi

Kazuhide Tomiyasu

Naru Usukura

Osamu Yamada

Tadashi Endo

Masahiro Mitani

Yuhji Yashiro

Toshiki Matsuoka

Akiko Miyazaki

Yoshikazu Hayashi

Kazuhiro Ohta

Tokuaki Kuniyoshi

Takaaki Yokoi

Tetsuya Yagi

Ryosuke Mori

Shohroh Mochida

Mahbub Rashid

Takuto Yasumatsu

Masahiro Hamada

Tomonori Shiomi

Toshiaki Sakurai

Toshiharu Kusumoto

Tetsuo Murata

Makoto Sekitoh

Yuji Ono

Hiroshi Ogata

Keiichi Fukuyama

A transmission device that improves data reception quality includes: a first pilot inserter that inserts a pilot signal into a first precoded signal; a phase changer that applies a phase change of i×Δλ to the second precoded signal, where i is a symbol number and an integer that is greater than or equal to 0; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. Δλ satisfies π/2 radians<Δλ<π radians or π radians<Δλ<3π/2 radians. When the communications scheme is an OFDM scheme, the phase changer and the phase changer apply a phase change, and when the communications scheme is a single-carrier scheme, do not apply a phase change.

Transmission device and transmission method

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.

Method of signal generation and signal generating device

A transmitting method includes: configuring a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating a plurality of transmission data to a plurality of areas; and transmitting the frame. The plurality of areas are each identified by at least one time resource among resources and at least one frequency resource among frequency resources. The frame includes a first period in which a preamble is transmitted, and a second period in which the plurality of transmission data are transmitted by at least one of time division and frequency division. The second period includes a first area, and the first area includes a data symbol generated from first transmission data, a data symbol generated from second transmission data and subsequent to the data symbol generated from the first transmission data, and a dummy symbol subsequent to the data symbol generated from the second transmission data.

Transmitting apparatus for transmitting an OFDM signal generated by performing IFFT processing on a preamble and one or more subframes into which pilot signals are inserted

Provided is a transmitting device which can expand a communication range when performing multicast/broadcast communication. The transmitting device includes a plurality of transmission antennas, and includes: a signal processor which generates a first baseband signal by modulating data of a first stream, and a second baseband signal by modulating data of a second stream; and a transmitter which generates, from the first baseband signal, first transmission signals having different directivities, generates, from the second baseband signal, second transmission signals having different directivities, and transmits the first transmission signals and the second transmission signals at a same time. When the transmitter has received, from a terminal, a request to transmit the first stream, the transmitter further generates, from the first baseband signal, third transmission signals which are different from the first transmission signals and have different directivities, and transmits the third transmission signals.

Transmitting method, transmitting device, receiving method, and receiving device

An OFDM transmitter and an OFDM receiver respectively transmit and receive N (N≥2, N is an integer) control symbols. For each control symbol, a guard interval time-domain signal is, for example, identical to a signal obtained by frequency-shifting at least a portion of a useful symbol time-domain signal by an amount different from any other symbol, or to a signal obtained by frequency-shifting one or both of a portion and a span of a useful symbol interval time-domain signal different from any other symbol by a predetermined amount.

OFDM transmitter device having a symbol generator for generating non-zero control symbols, and OFDM transmission method including generating non-zero control symbols

Provided are a frame configuring unit configured to configure a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating time resources and frequency resources to a plurality of transmission data, and a transmitter which transmits the frame. The frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, a second period in which a plurality of transmission data are transmitted by time division, a third period in which a plurality of transmission data are transmitted by frequency division, and a fourth period in which a plurality of transmission data are transmitted by time division and frequency division.

Transmitting method, receiving method, transmitting apparatus, and receiving apparatus

A transmitting method includes: configuring a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating time resources and frequency resources to a plurality of transmission data; and transmitting the frame, wherein the frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, and a second period in which the plurality of transmission data are transmitted by at least one of time division and frequency division, and among the plurality of OFDM symbols, OFDM symbols included in the second period include pilot symbols arranged along a time axis with a predetermined spacing therebetween, and a predetermined number of data symbols.

A signal generation method is used in a transmission device that transmits a plurality of transmission signals from a plurality of antennas at the same frequency and at the same time, in the case where larger power change is performed on a first transmission signal than on a second transmission signal during generation process of the first transmission signal and the second transmission signal, the first transmission signal and the second transmission signal are mapped before the power change such that a minimum Euclidian distance between possible signal points for the first signal is longer than a minimum Euclidian distance between possible signal points for the second signal.

Signal generation method, transmission device, reception method, and reception device

Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a precoding weight by a baseband signal after a first mapping and a baseband signal after a second mapping and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.

Broadcast signal transmission method, broadcast signal transmission apparatus, broadcast signal reception method, and broadcast signal reception apparatus

A precoding process is performed on a first baseband signal and a second baseband signal to generate a first precoding signal and a second precoding signal. A pilot signal is inserted into the first precoding signal and phase change is performed on the second precoding signal. A pilot signal is inserted into the phase changed second precoding signal, and phase change is further performed on the phase-changed second precoding signal with the pilot signal inserted.

Integrated circuit

A transmission method is performed by a transmitter including antenna elements. The transmission method includes: generating a digital calibration signal; performing digital-to-analog conversion on second digital signals to generate first analog signals, the second digital signals being obtained by adding the digital calibration signal to each of a plurality of first digital signals each corresponding to respective one of the antenna elements; performing analog-to-digital conversion on the first analog signals to generate third digital signals each corresponding to respective one of the antenna elements, the first analog signals each passing through respective one of the antenna elements; performing correlation calculation between the digital calibration signal and each of the third digital signals to calculate transmission delay characteristics each corresponding to respective one of the antenna elements; calculating transmission delay correction amounts based on the transmission delay characteristics; and correcting the transmission delay characteristics based on the transmission delay correction amounts.

Transmitter, receiver, transmission method, reception method, and non-transitory computer readable storage medium for performing beamforming in wireless transmission

An encoder outputs a first bit sequence having N bits. A mapper generates a first complex signal s1 and a second complex signal s2 with use of bit sequence having X+Y bits included in an input second bit sequence, where X indicates the number of bits used to generate the first complex signal s1, and Y indicates the number of bits used to generate the second complex signal s2. A bit length adjuster is provided after the encoder, and performs bit length adjustment on the first bit sequence such that the second bit sequence has a bit length that is a multiple of X+Y, and outputs the first bit sequence after the bit length adjustment as the second bit sequence. As a result, a problem between a codeword length of a block code and the number of bits necessary to perform mapping by a set of modulation schemes is solved.

Data processing method, precoding method, and communication device

A transmission device includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal; a first pilot inserter that inserts a pilot signal into the first precoded signal; a phase changer that applies a phase change of i×Δλ to the second precoded signal, where i is a symbol number and an integer that is greater than or equal to 0; an inserter that inserts a pilot signal into the phase-changed second precoded signal; and a phase changer that applies a phase change to the phase-changed and pilot-signal-inserted second precoded signal. Δλ satisfies π/2 radians<Δλ<π radians or π radians<Δλ<3π/2 radians.

A transmission apparatus includes M signal processors that respectively generate modulated signals directed to M reception apparatuses, M being an integer equal to or greater than 2, and an antenna section. Each signal processor modulates a first bit sequence made up of two bits to generate a first modulated signal and a second modulated signal, and modulates a second bit sequence made up of other two bits to generate a third modulated signal and a fourth modulated signal, in a case of transmitting multiple streams to a corresponding one of the M reception apparatuses. The antenna section includes a first antenna that transmits the first modulated signal and the third modulated signal and a second antenna that transmits the second modulated signal and the fourth modulated signal. At least either the signals transmitted from the first antenna or the signals transmitted from the second antenna are phase-changed signals.

Transmission apparatus and transmission method

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.

Transmission method, reception method, transmitter, and receiver

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Osaka, Japan

Tomohiro Kimura