Patent application number | Description | Published |
20090115548 | BALUN CIRCUIT AND INTEGRATED CIRCUIT DEVICE - A balun circuit includes a first CPW line | 05-07-2009 |
20090238206 | BAND CONTROL METHOD AND COMMUNICATION APPARATUS - The present invention intends to improve communication efficiency between two communication apparatuses each engaged in the communication by full duplex communication method by using a surplus band of the one to transmission band of the other. A first bandwidth required by a first communication apparatus (A) at data transmission and a second bandwidth required by a second communication apparatus (B) at data transmission are presumed. Next, the first bandwidth presumed as mentioned is compared to a first bandwidth used which the first communication apparatus (A) currently uses and at the same time, the second bandwidth presumed as mentioned is compared to a second bandwidth used which the second communication apparatus (B) currently uses. The first bandwidth and the second bandwidth are then adjusted, and a third bandwidth which the first communication apparatus (A) uses at data transmission and a fourth bandwidth which the second communication apparatus (B) uses are determined. | 09-24-2009 |
20100026575 | RADIO CONTROL METHOD - Provided is a radio control method for a radio communication being performed in a beam direction that is set on the basis communication quality basis, including a step of acquiring a data string formed of at least a beam direction and communication quality in the beam direction; and a step of sequentially assigning a priority rank for setting the beam direction for performing the radio communication from the beam direction in which the highest communication quality is obtained, according to the data string. In the step of assigning a priority rank, no priority rank is assigned to the beam direction adjacent to the beam direction to which a priority rank has been already assigned or to the beam direction in the vicinity containing the adjacent beam direction. | 02-04-2010 |
20100064050 | CONTENT DELIVERY SYSTEM USING WIRELESS PORTABLE TERMINAL AND DELIVERY METHOD THEREFOR - To reduce time to point a directional wireless portable terminal (WPT) to an access point (AP) when data is downloaded from the AP to the WPT, a user points the WPT to the AP, performs a first operation and transmits a request of authentication and download to the AP. The AP requests a server to perform the authentication and the download. The server transmits information on a current situation to the AP. The AP calculates time required until the download can be started based on content capacity and the like and transmits information on the calculated time to the WPT. The WPT displays countdown until the download can be started. During that time, the server performs the authentication and, if successful, delivers content to the AP. When the download can begin, the user performs a second operation and transmits a request of re-authentication and download to the AP. | 03-11-2010 |
20100075607 | METHOD OF CONTROLLING WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION SYSTEM - A method of controlling a wireless communication system including a plurality of communication devices is disclosed. In the method, firstly, one of the communication devices establishes a fixed beam pattern and transmits a training signal, and another communication device receives the training signal while scanning a beam direction by changing the AWVs of an antenna array. Next, it obtains a data string describing a relation between an incoming direction and a received-signal characteristic at the other communication device based on a reception result of the training signal. Then, it obtains first AWVs with which a beam is formed in a plurality of incoming directions of the received signal based on the data string. The roles of these two communication devices are interchanged and similar processes are performed in order to obtain second AWVs, and then one of AWV combinations combining first and second AWVs are used for wireless communication between these communication devices. | 03-25-2010 |
20100225399 | POWER AMPLIFIER, AND METHOD OF CONTROLLING POWER AMPLIFIER - A power amplifier of the present invention comprises MOS transistor ( | 09-09-2010 |
20110105032 | CONTROL METHOD OF WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION SYSTEM, TRANSMITTING APPARATUS, AND RECEIVING APPARATUS - A channel response matrix is obtained by performing a training process between a transmitter | 05-05-2011 |
20110221032 | BIAS CIRCUIT AND METHOD OF MANUFACTURING THE SAME - A bias circuit according to the present invention includes a resistor layer | 09-15-2011 |
20120092217 | CONTROL METHOD OF WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, AND ADJUSTMENT METHOD OF ARRAY WEIGHT VECTOR - To suppress adverse effects caused by side lobes of an antenna array when an AWV to be used for communication is determined based on a transmission/reception result of a training signal. A first transceiver generates a fixed beam pattern and transmits a training signal. In that state, a second transceiver receives the training signal while scanning for the main beam direction, and thereby determines a plurality of direction of arrivals (DOAs). Next, the second transceiver receives the training signal in a state where the signal receptions from the plurality of DODs are restricted one by one (e.g., a null direction or a direction close to the null direction is fixed in the DOA), and calculates the change of the signal characteristics from that obtained in the first reception. The transceivers obtain and use at least one AWV having the main beam direction or a sub-beam direction close to the main beam pointing to one of the plurality of DOAs except for the DOA for which the change is lower than a predefined threshold. | 04-19-2012 |
20120119953 | CONTROL METHOD OF WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION SYSTEM, ADJUSTMENT METHOD OF ARRAY WEIGHT VECTOR, AND WIRELESS COMMUNICATION DEVICE - To suppress an adverse effect caused by side lobes of an antenna array when determining an AWV to be used in communication. A first communication device transmits/receives a training signal while scanning a beam pattern, and a second communication device receives/transmits the training signal with a fixed beam pattern. A primary DOD/DOA in the first communication device is determined based on the transmission/reception result of the training signal. Then, second round training is performed. In this point, the first communication device transmits/receives the training signal while scanning a beam pattern in a state where transmission to the primary DOD or reception from the primary DOA is restricted. A secondary DOD/DOA is determined based on the result of the second round training. An AWV corresponding to the primary DOD/DOA and an AWV corresponding to the secondary DOD/DOA are selectively used in communication between the first and second devices. | 05-17-2012 |
20120142288 | METHOD OF CONTROLLING WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION SYSTEM - A first device transmits a training signal with a fixed beam pattern, a second device receives the training signal while scanning a beam direction, and then it obtains first AWVs each having a main beam or sub-beam beam direction in an incoming direction in the second device. Next, the first device transmits a training signal while scanning a beam direction, the second device receives the training signal with a fixed beam pattern, and then it obtains second AWVs each having a main beam or sub-beam direction in an emitting direction in the first communication device. The roles of these two devices are interchanged and similar processes are performed in order to obtain third and fourth AWVs, and then one of first AWV combinations from first and second AWVs and one of second AWV combinations from third and fourth AWVs are used for wireless communication between these devices. | 06-07-2012 |
20120220238 | CONTROL METHOD OF RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION APPARATUS - A communication device | 08-30-2012 |
20120220239 | CONTROL METHOD OF RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION APPARATUS - When communication is to be performed between communication devices having a directivity control function, a plurality of antenna-setting pairs available for the communication are stored by an initial training, and the communication is started by using one of the plurality of antenna-setting pairs. When the communication quality is deteriorated, firstly, a training signal is transmitted while successively setting each one of the plurality of antenna-setting candidates determined in the initial training in a transmitting antenna of one of the communication devices ( | 08-30-2012 |
20120280861 | RADIO COMMUNICATION APPARATUS, TRANSMITTER, AND RADIO COMMUNICATION METHOD - In a phased array antenna radio communication apparatus including a plurality of antennas, a radio communication apparatus is provided which can reduce an influence of the local leak signals on the radiation direction of transmission signals. Local signal phase shifters | 11-08-2012 |
20130002487 | CONTROL METHOD OF RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION APPARATUS - A communication quality test is performed for combinations between antenna setting candidates of a transmitting antenna of a first communication device ( | 01-03-2013 |
20130057449 | ANTENNA APPARATUS AND METHOD OF ADJUSTING THE SAME - An antenna apparatus | 03-07-2013 |
20130059553 | ANTENNA APPARATUS, ANTENNA SYSTEM, AND METHOD OF ADJUSTING ANTENNA APPARATUS - An antenna apparatus includes: first high-frequency output means for outputting a first high-frequency signal; second high-frequency output means for outputting a second high-frequency signal having the same frequency component as that of the first high-frequency signal; first antenna means for emitting a right-hand elliptically polarized wave according to the first high-frequency signal output from the first high-frequency output means; second antenna means for emitting a left-hand elliptically polarized wave according to the second high-frequency signal output from the second high-frequency output means; and phase adjustment means for adjusting a phase of at least one of the first high-frequency signal output from the first high-frequency output means and the second high-frequency signal output from the second high-frequency output means. | 03-07-2013 |
20140098700 | SENSOR AND RECEIVING DEVICE IN SENSOR SYSTEM - A sensor system in which it is possible to identify a sufficient number of sensors even in a situation where the data length of a packet is limited, as well as a sensor and a receiving device in the same, are provided. A sensor repeating a measurement period for performing measurement and a transmission period for performing transmission at predetermined cycles, includes: a measurement section ( | 04-10-2014 |
20140292577 | CONTROL METHOD OF RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION APPARATUS - A communication device | 10-02-2014 |