Sony Corporation

Mohammad Ghavami

Lachlan Bruce Michael

Ryuji Kohno

Robert Morelos-Zaragoza

A wireless impulse transmitter that is for transmitting pulse trains to a plurality of receivers, includes a pulse selector, a pulse supplier, and a transmission unit. The pulse selector is for selecting, from a plurality of orthogonal pulse shapes assigned in a two-to-one correspondence with the receivers, pulse shapes corresponding to symbols of an input data stream. Each of the two pulse shapes assigned to each receiver represents either one or zero to the corresponding receiver. The pulse supplier is for supplying pulses in pulse shapes selected by the pulse selector. The transmission unit is for transmitting the pulses supplied from the pulse supplier in pulse trains, wherein pulses with pulse shapes assigned to different receivers are transmitted simultaneously.

Wireless impulse transmitter, receiver, and method

A transmitter, the method of the same, and a communication system using the scheme of space-time block coding employing the multiple beams to mitigate the multipath fading. A transmitter constituted array antennas first performs beams scanning employing beamforming network for estimating the channel space gain pattern, then estimates number of the beams for transmission and the corresponding angles of each beam, performs beam space-time block encoding of input signals then transmitting the encoded signals. The receiver receives the signal and performs linear channel decoding, for example, maximum likelihood decoding.

Transmitter, the method of the same and communication system

A wide-band array antenna using a single real-valued multiplier for each antenna element is simple in construction and suitable for wide-band code division multiple access (WCDMA) mobile communication systems. A rectangular array antenna is formed by N&#xd7;M antenna elements. Each antenna element has a frequency dependent gain which is the same for all elements. Each antenna element is connected to said single real-valued multiplier with a single real-valued coefficient, which is determined by properly selecting a number of points on a u-v plane defined for simplifying the design procedure according to the selected design algorithm.

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Tokyo, Japan

Mohammad Ghavami