Panasonic Corporation

Panasonic Intellectual Property Corporation of America

Fumiyuki Adachi

Daichi Imamura

Seigo Nakao

Toru Oizumi

Yasuaki Yuda

Shinsuke Takaoka

Tetsuya Yamamoto

Ryohei Kimura

Akihiko Nishio

Masayuki Hoshino

Katsuhiko Hiramatsu

Kenichi Miyoshi

Yoshihiko Ogawa

Yoshiko Saito

Kazuaki Takeda

Hiromichi Tomeba

In a transmission apparatus, a mapper maps frequency components of an analog signal at equally spaced discrete locations within a transmission frequency band, a time-division multiplexer time-division multiplexes the analog signal and a preamble signal to generate a transmission signal, the preamble signal being a digital signal whose frequency components are continuously mapped over the transmission frequency band, and a transmitter transmits the transmission signal, wherein an autocorrelation value of the transmission signal being to be used for timing synchronization at a reception apparatus that receives the transmission signal.

Transmission apparatus, reception apparatus, transmission method, and reception method

A transmission device capable of reducing packet receiving errors and the number of retransmissions by improving error correction coding gain without increasing the amount of resources used in transmission. The transmission device () that transmits each bit of coded data constituted from systematic bits and parity bits in order for each transmission unit, and performs frequency puncturing to puncture, in units of symbols, data to be punctured in which each bit has been superimposed on a plurality of frequency domain symbols. A time puncturing unit () extracts transmission unit data from the coded data and a frequency puncturing unit () performs frequency puncturing in accordance with the ratio of parity bits to systematic bits included in the data.

Transmission device and transmission method

An SC-FDMA transmission device capable of achieving excellent error rate characteristics on any propagation channel, wherein a determination unit () determines the ratio of the frequency puncturing amount to the time puncturing amount in the total puncturing amount on the basis of a puncturing determination rule, and a setting unit () sets the time puncturing amount and the frequency puncturing amount on the basis of this ratio. Here, in the puncturing determination rule, the ratio is determined from the MCS of the encoded data, the number of resources allocated to the encoded data, and the delay spread of the propagation channel between a receiving device and the transmission device ().

SC-FDMA transmission device and transmission method

A wireless transmission apparatus able to reliably increase outage capacity according to the state of a propagation path. This apparatus is a wireless transmission apparatus () which transmits a plurality of streams to a wireless reception apparatus; wherein a time/space allocation determining unit () determines the spatial multiplex stream number based on the desired multipath number and the number of reception antenna ports of the wireless reception apparatus, said desired multipath number being calculated based on the detected multipath number, the number of reception antenna ports, and the desired error rate for the plurality of streams; a stream dividing unit () divides the transmission data into a plurality of streams of that spatial multiplex stream number; a transmission weight calculation unit () calculates a transmission weight based on the desired multipath number, spatial multiplex stream number, and a channel estimation value; and a time precoding unit () and a spatial precoding unit () use the transmission weight to precode the plurality of streams.

Wireless transmission apparatus and precoding method

A wireless communication apparatus capable of enhancing the transmission efficiency, while maintaining a good BER characteristic. In this apparatus, a setting part () sets, based on the maximum delay amount of a delayed wave and also based on the expansion of impulse response of FDE, an FFT part () to establish an FFT section of Nc symbol, and also sets a selecting part () to establish a selection section of Nc&#x2212;2M&#x2212;&#x394; symbol that is shorter than the FFT section. The setting part () also sets the start points of FFT and selection sections established at this time for such timings that they are shifted by Nc&#x2212;2M&#x2212;&#x394; symbol from the start points of the FFT and selection sections previously established. It should be noted that the maximum delay amount of the delayed wave is &#x394; symbol, the expansion of impulse response of FDE is plus/minus M symbols, and the symbol block length is Nc.

Wireless communication apparatus and wireless communication method

Growing community of inventors

Miyagi, Japan

Fumiyuki Adachi