Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Satoshi Kaga

Hiroaki Kobayashi

Makoto Sasaki

Shinichi Okada

Yasumi Imagawa

Yasunori Komukai

Yasumichi Takai

Yoshinori Hiramatsu

Kazuhiko Nakayama

Toshihiro Nagayama

A transmission system includes: an antenna; a control device including an RF circuit which transmits a first signal for controlling a radio wave to be outputted from the antenna and an external power supply which supplies direct current to the antenna; and a first transmission path which connects the antenna and the control device, and is used in transmission of the first signal and supplying of the direct current to the antenna.

Transmission system, antenna, control device, and transmission method

It is a theme of the present invention to provide a diversity receiving device and a receiving scheme switching method, capable of attaining a power saving by executing a switching between a diversity reception and a single reception with high accuracy. A receiving scheme switching portion () switches a receiving mode between a single reception and a diversity reception based on a receiving scheme switching threshold, updates the receiving scheme switching threshold based on the receiving rate calculated by a receiving rate calculating portion (), switches the receiving mode into the single reception in which respective ones of antennas (), radio demodulating portions (), and decoding portions () are employed respectively and also turns OFF respective power supplies of the remaining antenna (or), the remaining radio demodulating portion (or), and the remaining decoding portion (or) when the received quality calculated by the received quality calculating portion () exceeds the receiving scheme switching threshold, and switches the receiving mode into the diversity reception in which the antennas, the radio demodulating portions, and the decoding portions are employed in both branches when the received quality is below the receiving scheme switching threshold.

Diversity receiving device and receiving scheme switching method

Growing community of inventors

Ishikawa, Japan

Satoshi Kaga