Patent application number | Description | Published |
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 |
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 |
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 |
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 |
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 |
20120256805 | ARRAY ANTENNA APPARATUS HAVING SHORTEST WIRING DISTANCE TO ANTENNA ELEMENTS - An array antenna apparatus includes a radio circuit; an array antenna that includes a plurality of antenna elements; feeder lines that connect the radio circuit to the respective antenna elements; and a delay circuit provided at each of one or more of the feeder lines. An amount of delay of the delay circuit is set so that the sum of a phase delay by the delay circuit and a phase delay due to a difference between a length of the corresponding feeder line and a predetermined reference length is an integer multiple of 360 degrees. | 10-11-2012 |
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 |
20140292577 | CONTROL METHOD OF RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION APPARATUS - A communication device | 10-02-2014 |
20140320228 | NON-RECIPROCAL CIRCUIT ELEMENT, COMMUNICATION APPARATUS EQUIPPED WITH CIRCUIT INCLUDING NON-RECIPROCAL CIRCUIT ELEMENT, AND MANUFACTURING METHOD OF NON-RECIPROCAL CIRCUIT ELEMENT - A circulator includes a ferrite disposed above a PCB, a metal cover that covers above the ferrite and is formed integrally, a plurality of connection parts that electrically connect the metal cover to a plurality of respective signal transmission lines above the PCB, and a permanent magnet that applies a magnetic field to the ferrite. Thus, it is possible to provide, for example, a non-reciprocal circuit element that is composed of a small number of parts and can be easily mounted on a circuit board, a communication apparatus equipped with a circuit including the non-reciprocal circuit element, and a manufacturing method of a non-reciprocal circuit element. | 10-30-2014 |