Panasonic Corporation

Panasonic Intellectual Property Corporation of America

Matsushita Electric Industrial Co., Ltd.

Wi-fi One, LLC

Harris Corporation

Optis Wireless Technology, LLC

Interdigital Patent Holdings, Inc.

Panasonic Intellectual Property Management Co., Ltd.

Redwood Technologies, LLC

Masayuki Orihashi

Yutaka Murakami

Akihiko Matsuoka

Kiyotaka Kobayashi

Shinichiro Takabayashi

Shutai Okamura

Katsuaki Abe

Takaaki Kishigami

Shozo Okasaka

Yoichi Nakagawa

Kazuaki Takahashi

Morikazu Sagawa

Daichi Imamura

Kenichi Takahashi

Rahul Malik

Job Cleopa Msuya

Masato Ukena

Atsushi Sumasu

Toshiyuki Morii

Ayako Horiuchi

Katsuhiko Hiramatsu

Yoshihiko Ogawa

Suguru Fujita

Hiroshi Ohnishi

Naoya Yosoku

Michiaki Matsuo

Kouei Misaizu

Masayoshi Yoneyama

Yukata Murakami

Shinichir Takabayashi

A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts that encode transport data; a mapping part that performs such a mapping that encoded data sequentially formed by the encoding parts are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.

Wireless communication base station apparatus, wireless communication terminal, communication method of a wireless communication base station apparatus and communication method of a wireless communication terminal

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 low-density parity check convolution code (LDPC-CC) is made, and a signal sequence is sent after being subjected to an error-correcting encodement using the low-density parity check convolution code. In this case, a low-density parity check code of a time-variant period (3g) is created by linear operations of first to 3g-th (letter g designates a positive integer) parity check polynomials and input data.

Transmission method, transmission apparatus, reception method and reception apparatus

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 transmission apparatus includes an encoder that codes a data sequence with a parity check matrix, wherein the data sequence includes a final information bit sequence and virtual information bits, and outputs the final information bit sequence and a parity sequence, as LDPC codes, and a transmitter that transmits the LDPC codes as a transmission data. A column length of the parity check matrix is longer than a total length of the final information bit sequence and the parity sequence, by a length of the virtual information bits that are set to '0' and are not transmitted. The total length of the final information bit sequence and the parity sequence has a sequence length corresponding to a length from a first column to a determined column of the parity check matrix. The encoder generates the LDPC codes by using the first column to the determined column among one or more column(s) of the parity check matrix.

Transmission apparatus and associated method of encoded data

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Kanagawa, Japan

Masayuki Orihashi