Nippon Telegraph and Telephone Corporation

Syuji Kubota

Yasushi Takatori

Koichi Ishihara

Hirohito Suda

Masahiro Umehira

Shuichi Yoshino

Eisuke Kudo

Masayoshi Nakayama

Katsutoshi Nidaira

Orthogonal converters perform orthogonal conversion on the N time-series data extracted from a received radio signal. Multi-user detectors extract transmitted signals from respective transmission devices, from the time-series data which has been subjected to the orthogonal conversion. Inverse orthogonal converters perform inverse orthogonal conversion on the extracted transmitted signal. Rectangular filter circuits remove Mh time-series data at the front end and Mt time-series data at the rear end, from the transmitted signal which has been subjected to the inverse orthogonal conversion, so as to extract Nw time-series data. Deinterleaver circuits deinterleave the aforementioned time-series data. Decoders decode the time-series data for output.

Reception device, transmission device, radio transmission/reception system, and radio reception method

In a wireless communication system formed by a plurality of access points constituting a wireless network, through which user terminals make accesses, and at least one control station configured to control the access points, public access points are systematically set up by a manager of the control station, while user's personal access points to be freely set up by users at desired locations according to needs of users are accommodated by operating the control station to measure a utilization level of each user's personal access point and charge an owner of each user's personal access point according to a measured utilization level and set up relay routes using the public access points and the user's personal access points.

Wireless communication system using access points that can be freely set up by users

Growing community of inventors

Yokosuka, Japan

Syuji Kubota