Panasonic Corporation

Naoto Oka

Hiroshi Takahashi

Yoshio Urabe

Masataka Irie

Kazuhiro Ando

Hirokazu Kobayashi

Takenori Sakamoto

Takeshi Kanazawa

Toyoki Kawahara

A radio communication method includes the steps of: storing a beam having a good characteristic and a beam having a bad characteristic on the basis of a result of beamforming setting; reserving a calibration period; changing a beam to the beam having the bad characteristic in the reserved calibration period; performing calibration in the reserved calibration period; and changing the beam having the bad characteristic to the beam having the good characteristic after the reserved calibration period has elapsed.

Radio communication method and radio communication apparatus

In a signal detection apparatus, power detection sectiondetects power of an inputted received signal, and upon detection of power exceeding a power detection threshold, outputs a trigger to storage section. Storage sectionstores a first received signal upon reception of the trigger and outputs the stored first received signal to multiplierand newly stores a second received signal upon receipt of the next trigger. Multipliermultiplies the second received signal by the first received signal, integratorintegrates the multiplication result from multiplierduring a predetermined duration to obtain a correlation value of the second and first received signals, and absolute value calculation sectioncalculates an absolute value of the correlation value from integrator. Determination sectiondetermines the presence/absence of a detection-target signal based on the absolute value of the correlation value from absolute value calculation section

Signal detector device and signal detection method

A signal separating device the computational complexity of which is reduced and the communication quality of which is improved. A channel matrix interchanging section () creates matrices defined by interchanging the elements of channel estimation matrices multiplied by symbol candidates relevant to the final stage. A QR separating/QH multiplying sections () each perform QR separation by using the created matrices and perform multiplication of the transposed matrix of the Q matrix of each created matrix by the received signal. At the final stage, the maximum likelihood judging sections () each calculate only the value representing the squared Euclidean distance between the signal point when the combination of the symbol candidates until the final stage is fixed and the candidate point relevant to the final state nearest to the signal point by using the results of the computations by the QR separating/QH multiplying sections (), thus reducing the computational complexity while preventing absence of the bit likelihood.

Signal separating device and signal separating method

A radio communication device includes a reception unit for receiving a route request message from another radio communication device, a route control message processing unit for judging whether the received route request message is addressed to itself or not, a route request message management unit for deciding a delay amount for delaying response transmission or relay forwarding with regard to the route request message according to an operating state of the radio communication device when the route request message is not addressed to itself, and a delay processing unit which performs response transmission or relay forwarding to the route request message when the delay amount time has expired. Thus, a route selected giving preference to radio communication devices having a preferable operating state can be obtained.

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Kanagawa, Japan

Naoto Oka