Sony Corporation

Sony Deutschland Gmbh

Seiichi Izumi

Hiroaki Takano

Tomoya Yamaura

Hiroaki Takahashi

Hiroyuki Fukada

Masanori Sato

Shinichi Kuroda

Osamu Ito

Norihito Mihota

Ryou Sawai

There is provided a sonic wave output device comprising, a receiving unit to receive wireless signals transmitted from a certain signal source, a determination unit to determine a parameter value depending on a location of the signal source using the wireless signals received by the receiving unit and a sonic wave output unit to output sonic waves with directionality toward a direction of the signal source based on the parameter value.

Sonic wave output device, voice communication device, sonic wave output method and program

There is provided a receiving apparatus including a plurality of receiving antennas, each of which receives a radio signal in which sub-carriers of different frequencies are multiplexed, a phase calculation unit that calculates a phase difference of each radio signal received by the plurality of receiving antennas from that of a reference signal for each of the sub-carriers contained in the radio signals, and a path difference calculation unit that calculates a path difference, which is a difference of distances from a transmitting antenna from which the radio signals are transmitted to any two receiving antennas of the plurality of receiving antennas, based on the phase difference calculated by the phase calculation unit.

Receiving apparatus, radio communication system, position estimation method and program

There is provided a communication apparatus, including a transmission unit that transmits information by a plurality of systems and a reception unit that receives information by a plurality of systems, wherein the transmission unit includes a calibration information generation unit that generates calibration information transmitted for each the system and a calibration information generation notification generation unit that generates a calibration information generation notification indicating that the calibration information has been generated by the calibration information generation unit for each system, and the reception unit includes a calibration information detection unit that starts measurement of time based on reception of the calibration information generation notification and detecting calibration information turned back by the transmission unit for each system after a fixed time passes after starting measurement of time.

Communication apparatus and communication calibration method

A wireless commutation device includes: an antenna unit including antennas transmitting and receiving wireless signals; an analog processing unit including transmitting analog circuits and receiving analog circuits processing analog transmitting and received signals; a digital processing unit processing digital transmitting and received signals; an inter-antenna propagation loss determination unit determining propagation losses between the antennas; a loopback transfer function gain acquisition unit acquiring, through loopback of a calibration signal between the antennas, gains of loopback transfer functions between antenna branches; a loopback transfer function gain correction unit correcting the gains by using the propagation losses; a correction coefficient determination unit determining the respective gain ratios among the receiving analog circuits and the transmitting analog circuits by using the corrected gains, and determining correction coefficients by using the gain ratios; and a gain calibration processing unit performing gain calibration on the digital transmitting and received signals by using the correction coefficients.

Wireless communication device, wireless communication method, and computer program

A synchronization circuit includes a packet detecting unit that searches a received signal for a preamble that is added to the beginning of a packet and that includes given repetitive training sequences to detect the packet; a packet detection reconfirming unit that reconfirms the packet detection by the packet detecting unit by using a received signal in a field in the preamble, subsequent to the field where the packet detecting unit has detected the packet; and a control unit that cancels the packet detection by the packet detecting unit in response to the packet detection reconfirming unit that detects erroneous detection of the packet by the packet detecting unit to cause the packet detecting unit to start detection of a packet from a received signal again.

Synchronization circuit, synchronization method, wireless communication apparatus, wireless communication method, and computer program

There is provided a receiving apparatus including a plurality of antennas, a phase difference detection unit to detect a phase difference of each of a plurality of received signals received by the plurality of antennas, a phase adjustment unit to align phase of the plurality of received signals based on the phase difference detected by the phase difference detection unit, an adding unit to add the plurality of received signals with the phase aligned by the phase adjustment unit together, and a synchronous detection unit to perform synchronous detection using a signal obtained by addition in the adding unit.

Receiving apparatus, receiving method and wireless communication system

There is provided a communication device including: a receiving unit that receives radio signals transmitted from another communication device using a plurality of transmitting antennas by a plurality of receiving antennas; an estimation unit that estimates a range of a position where said another communication device possibly exists based on a phase of each radio signal received by the receiving unit and antenna spacing between the transmitting antennas; and a position determination unit that determines an existing position of said another communication device within the range estimated by the estimation unit.

Communication device, communication system, position detection method and program

A wireless communication apparatus for receiving a packet by detecting synchronization timing. The wireless communication apparatus includes: signal receiving means for receiving a transmission signal from a transmission source through an antenna; synchronization-timing detecting means for detecting synchronization timing using a timing detection field included in a header portion of the packet; synchronization-timing adjusting means for estimating and adjusting the amount of synchronization-timing shift detected by the synchronization-timing detecting means; and receive processing means for performing receive processing of the packet in accordance with the adjusted synchronization timing.

Wireless communication apparatus and wireless communication method

A receiving apparatus includes a receiving portion to receive a radio signal generated based on one baseband signal of a baseband signal having a prescribed frequency band and a baseband signal having a partial frequency band being a part of the prescribed frequency band, a signal processing portion to generate the baseband signal by converting a frequency of the radio signal, a filter portion to output a plurality of partial signals, each having a frequency component of each partial frequency band extracted from the baseband signal generated by the signal processing portion, and an analysis portion to analyze characteristics of each partial signal of the plurality of partial signals output from the filter portion.

Receiving apparatus, program and receiving method

A receiving portion for receiving a wireless signal generated on the basis of a baseband signal having either a predetermined frequency band or a baseband signal having any of partial frequency bands; a signal processing portion for generating the baseband signal; a band shifter for shifting the frequency band of the baseband signal by such an amount of shift that the center frequency of at least a specific partial frequency band is in the vicinity of 0 Hz; a filter portion for outputting a partial signal, which is gained by sampling a signal component of the frequency band having a bandwidth of the specific partial frequency band with approximately 0 Hz as the center frequency, from the baseband signal; and a determining portion for determining the frequency band of the baseband signal on the basis of the partial signal.

Disclosed is a wireless communication apparatus which synthesize signals received from a plurality of antennas to separate the signals into synthesis signals of a plurality of logical channels. The apparatus has a first phase corrector correcting a phase of a reception signal by estimating an amount of phase correction by a frequency offset of each reception signal from the plurality of antennas; a synthesizer synthesizing reception signals after phase correction by the first phase corrector to separate the reception signals into synthesis signals of a plurality of logical channels; and a second phase corrector correcting a phase of a synthesis signal by estimating an amount of phase correction by a residual frequency offset after phase correction by the first phase corrector based on the synthesis signal synthesized by the synthesizer.

Method and apparatus for allocating time slots in a time division duplex communication system. First and second types of time slots selected from receiving and transmitting type time slots are allocated as the first and second time slots, respectively, in a current frame. Based on an amount of information to be transferred, it is determined whether at least one time slot following the second time slot of the frame should be allocated as the first type of time slot, and if so, the last time slot of the frame is always allocated as the first type of time slot, whereby the last time slot of the frame and the first time slot of a succeeding frame are of the same type. If an additional time slot(s) is allocated for the second type of time slot, the third slot is always designated for the second type.

Method and means for allocating time slots in a TDD system

A TDMA system receiver detects an offset amount of a carrier frequency of a received signal. A receiver for receiving a signal, including a periodic burst signal, includes a receiver unit for receiving a signal including a burst signal, a phase detecting circuit for detecting a phase of a predetermined pattern in a first burst signal and for detecting a phase of a predetermined pattern in a second burst signal, a calculating circuit for calculating an offset amount of a carrier frequency, and a correcting unit for correcting the offset amount of the carrier frequency.

Growing community of inventors

Kanagawa, Japan

Seiichi Izumi