Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Corporation of America

Wi-fi One, LLC

Optis Wireless Technology, LLC

Harris Corporation

Panasonic Intellectual Property Management Co., Ltd.

Interdigital Patent Holdings, Inc.

Shell Oil Comapny

Redwood Technologies, LLC

Ryuji Kohno

Akihiko Matsuoka

Masayuki Orihashi

Yutaka Murakami

Kiyotaka Kobayashi

Shinichiro Takabayashi

Katsuaki Abe

Kentaro Miyano

Yoichi Nakagawa

Tomoya Urushihara

Morikazu Sagawa

Takenori Sakamoto

Hidekuni Yomo

Wayne S Lee

Kouei Misaizu

Daichi Imamura

Hiroshi Ohnishi

Kenichi Takahashi

Atsushi Maruyama

Yoshifumi Hosokawa

Yuuri Yamamoto

Gary Lang Do

Rahul Malik

Shutai Okamura

Noriaki Saito

Yoshinori Kunieda

Kenichi Mori

Makoto Hasegawa

Kaoru Ishida

Kazuaki Takahashi

Suguru Fujita

Toru Matsuura

Hiroshi Onishi

Takashi Fukagawa

Naoki Adachi

Michiaki Matsuo

Yoshito Shimizu

Taichi Ikedo

Osamu Kamita

Motoko Taniguchi

Shinichir Takabayashi

Masayuki Orihasi

Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S() and S(+1) obtained from different data are transmitted at time i and time i+1 respectively. In contrast, as modulated signal A, modulated symbols S() and S()' obtained by changing the signal point arrangement of the same data are transmitted at time i and time i+1 respectively. As a result the reception quality can be changed intentionally at time i and time i+1, and therefore using the demodulation result of modulated signal A of a time when the reception quality is good enables both modulated signals A and B to be demodulated with good error rate performances.

Communication apparatus and communication method

A communication apparatus includes a reference signal generating section, a transmitting section, a propagation estimating section, a first data acquiring section, and a decoding section. The reference signal generating section generates a first reference signal to enable a communicating party to estimate a propagation environment. The transmitting section transmits the first reference signal. The propagation estimating section estimates a first propagation estimation value of the propagation environment using a second reference signal transmitted from the communicating party. The first data acquiring section generates first data using the first propagation estimation value. The decoding section decodes a transmission signal encoded using a second propagation estimation value that is estimated by the communicating party using the first reference signal, to obtain second data using the first data.

Communication apparatus and communication system

A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.

Transmission and reception signal processor and method

A plurality of multicarrier signals is generated. Each of the plurality of multicarrier signals includes a pilot symbol sequence at a same temporal point in each multicarrier signal. Each pilot symbol sequence includes a plurality of pilot symbols with non-zero amplitude. The pilot symbol sequences are orthogonal to each other at the same temporal point. A quantity of the plurality of pilot symbols in each pilot symbol sequence is greater than or equal to a quantity of the plurality of multicarrier signals to be transmitted. The plurality of multicarrier signals are transmitted in an identical frequency band from a plurality of antennas. The plurality of antennas includes two, three, or four antennas.

Methods and apparatus for transmitting modulation signals

A radio transmission apparatus determines information indicative of an estimated communications channel condition and generates a single modulation signal or a plurality of modulation signals based on the estimated communications channel condition information. The single modulation signal is transmitted from a first antenna of a plurality of antenna or the plurality of modulation signals are transmitted from the first antenna and at least a second antenna of the plurality of antenna. The plurality of modulation signals include different information from each other and are transmitted over an identical frequency band and at an identical temporal point. The single modulation signal and the plurality of modulation signals contain parameter information indicating a number of modulation signals transmitted at the same time.

Radio transmission apparatus and methods for transmitting a single or a plurality of modulation signals from one or more antenna

Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S2(i) and S2(i+1) obtained from different data are transmitted at time i and time i+1 respectively. In contrast, as modulated signal A, modulated symbols S1(i) and S1(i)' obtained by changing the signal point arrangement of the same data are transmitted at time i and time i+1 respectively. As a result the reception quality can be changed intentionally at time i and time i+1, and therefore using the demodulation result of modulated signal A of a time when the reception quality is good enables both modulated signals A and B to be demodulated with good error rate performances.

A first OFDM frame signal includes a grid of multiple frequency subcarriers and multiple time periods.&#x2014;An OFDM symbol is transmitted using multiple frequency subcarriers during a time period and includes known reference OFDM symbols assigned to corresponding time-frequency resource elements in the grid. &#x2014;Each resource element is defined by a one of the multiple frequency subcarriers and one of the multiple time periods. &#x2014;A second OFDM frame signal is also generated, but the resource elements assigned to the known reference OFDM symbols are different from the time-frequency resource elements in the grid assigned to the known reference OFDM symbols in the first OFDM frame signal. The first and second OFDM frame signals are converted to a first and second radio signals. The first radio signal is transmitted from a first antenna and the second radio signal from a second, different antenna.

OFDM frame communication method and apparatus

A plurality of multicarrier signals is generated. Each of the plurality of multicarrier signals includes a pilot symbol sequence at a same temporal point in each multicarrier signal. Each pilot symbol sequence includes a plurality of pilot symbols with non-zero amplitude. A quantity of the plurality of pilot symbols in each pilot symbol sequence is greater than or equal to a quantity of the plurality of multicarrier signals to be transmitted. The plurality of multicarrier signals are transmitted in an identical frequency band from a plurality of antennas.

A radio transmission apparatus determines information indicative of an estimated communications channel condition and generates a single modulation signal or a plurality of modulation signals based on the estimated communications channel condition information. The single modulation signal from a first antenna or the plurality of modulation signals is(are) transmitted from the first antenna and a second antenna. The plurality of modulation signals include different information from each other and are transmitted over an identical frequency band and at an identical temporal point. The single modulation signal and the plurality of modulation signals contain parameter information indicating a number of modulation signals transmitted at the same time.

Radio transmission apparatus and methods

A processor generates first position information on a relative position between a camera and a radar, acquires, from the radar, second position information on a relative position between the radar and a reflector, the second position information being generated by using an arrival direction of the radar transmission wave, and calculates a displacement amount by comparing the first position information and the second position information with each other.

Radar axis displacement amount calculation device and radar axis displacement calculation method

Transmission apparatus and method, and reception apparatus and method

A transmission apparatus includes processing circuitry that generates a first data sequence representing first data or a second data sequence representing second data different from the first data and selects the first data sequence as an output data sequence. A modulation scheme is determined from a plurality of modulation schemes, and the output data sequence is modulated with the determined modulation scheme. Transmission circuitry transmits the modulated output data sequence. A first time interval associated with selecting the first data sequence for the output data sequence is longer than a second time interval associated with determining the determined modulation scheme.

Transmission method and transmission apparatus

A transmission apparatus and method include modulating a transmission signal using a first modulation scheme selected from a plurality of modulation schemes to generate a first symbol sequence. A second symbol, generated using a phase shift keying (PSK) modulation scheme, is inserted in the first symbol sequence to generate a first modulation signal for transmission. A second modulation signal is received that includes a third symbol generated using a PSK modulation scheme and inserted in a second symbol sequence generated using a second modulation scheme selected from the plurality of modulation schemes. The third symbol is extracted from the received modulation signal. A transmission path associated with the received modulation signal is estimated using the third symbol. A received data signal from the second symbol sequence included in the received modulation signal is output using the estimated transmission path.

Transmission apparatus, reception apparatus and digital radio communication method

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Kanagawa, Japan

Akihiko Matsuoka