摘要:
In a wireless transmitting device which performs transmission by an OFDM using a plurality of subcarriers orthogonal to each other, a plurality of preambles to which a plurality of different subcarrier groups selected from a plurality of subcarriers within an OFDM signal band are allocated are transmitted by using a plurality of transmit antennas, and data is transmitted by using the antennas after the preambles are transmitted.
摘要:
In a wireless transmitting device which performs transmission by an OFDM using a plurality of subcarriers orthogonal to each other, a plurality of preambles to which a plurality of different subcarrier groups selected from a plurality of subcarriers within an OFDM signal band are allocated are transmitted by using a plurality of transmit antennas, and data is transmitted by using the antennas after the preambles are transmitted.
摘要:
In a wireless transmitting device which performs transmission by an OFDM using a plurality of subcarriers orthogonal to each other, a plurality of preambles to which a plurality of different subcarrier groups selected from a plurality of subcarriers within an OFDM signal band are allocated are transmitted by using a plurality of transmit antennas, and data is transmitted by using the antennas after the preambles are transmitted.
摘要:
In a wireless transmitting device which performs transmission by an OFDM using a plurality of subcarriers orthogonal to each other, a plurality of preambles to which a plurality of different subcarrier groups selected from a plurality of subcarriers within an OFDM signal band are allocated are transmitted by using a plurality of transmit antennas, and data is transmitted by using the antennas after the preambles are transmitted.
摘要:
A wireless receiving device includes n (n is an integral number not less than 2) reception branches each capable of receiving a wireless packet containing a first signal, a second signal and a third signal in this order, the first signal including a single stream, the second signal indicating transmission of the third signal, and the third signal including a data section of a plurality of streams, a demodulation/decoding unit configured to demodulate and decode each of output signals of the reception branches, and a control unit configured to supply a power to m (m is an integral number of m
摘要:
There is provided with an amplifier comprising: first and second power amplifiers; a first path configured to output first and second input signals to the first and second power amplifiers; a second path configured to divide a first input signal, output one of divided signals to the first power amplifier and output the other divided signal to the second power amplifier; a first path changeover unit configured to change over the first and second paths; a third path configured to output first and second power amplified signals from the first and second power amplifiers; a fourth path configured to combines a first power amplified signal through an impedance conversion unit from the first power amplifier and a second power amplified signal from the second power amplifier at a combining point and output a combined signal; and a second path changeover unit configured to changeover the third and fourth paths.
摘要:
A mobile communications terminal includes positional information generator configured to generate positional information indicating a current position of the terminal, receiver which receives identification information sent from the base station of the second mobile communication network, notification information generator configured to generate notification information including the identification information and the positional information generated at the time of receiving the identification information, and transmitter which transmits the notification information to the service area calculation apparatus via the first mobile communication network to derive the information concerning the service area.
摘要:
An apparatus used in a first mobile communication system with a plurality of wireless base stations, the first mobile communication system operated by a first provider, the apparatus including an acquiring unit, a location detecting unit configured to detect a present location of the apparatus, a storing unit configured to store first service location information with respect to the first provider, and a location information providing unit configured to calculate locally a location of the plurality of wireless base stations using the detected present location of the apparatus stored in the storing unit. The location information providing unit is configured to provide a user with information based on the first service location information and the second service location information.
摘要:
The present invention is intended to provide a mobile communication terminal permitting a user to obtain location information of wireless base station which provides contents data in certain areas. The terminal accumulates identification information of wireless base stations when wireless services are received. The invention has functions of interrelating the identification information with location information of the terminal when the services are received and of storing both kinds of information. Wireless LAN service areas are displayed together with map information.
摘要:
An apparatus used in a first mobile communication system with a plurality of wireless base stations, the first mobile communication system operated by a first provider, the apparatus including an acquiring unit, a location detecting unit configured to detect a present location of the apparatus, a storing unit configured to store first service location information with respect to the first provider, and a location information providing unit configured to calculate locally a location of the plurality of wireless base stations using the detected present location of the apparatus stored in the storing unit. The location information providing unit is configured to provide a user with information based on the first service location information and the second service location information.