Patent application number | Description | Published |
20090196372 | Channel Sounding and Estimation Strategies for Antenna Selection in MIMO Systems - Techniques and devices for antenna selection in a multiple-input-multiple-output (MIMO) system, in which communication is between a transmitter having a first plurality of radio-frequency (RF) chains coupled to a first plurality of antennas and a receiver having a second plurality of RF chains coupled to a second plurality of antennas, are provided. Techniques include receiving consecutive sounding packets each have a training symbol and that collectively sound a full-size channel for the MIMO system. A sub-channel estimate for each sounding packet can then be determined based on various factors, such as a known power level rule and gain factor. Scaling factors may be applied to each of these sub-channel estimates to produce a scaled sub-channel estimates. | 08-06-2009 |
20090299876 | Method and apparatus for conducting unsolicited trades using personal computers or handheld devices over cellular networks and the internet - A method and apparatus to enable subscribers of cellular or telephone networks and internet users to conduct unsolicited and direct trading of goods, offering or requesting services, searching for friends, obtaining or providing specific pieces of information using handheld and personal devices that include smart phones, personal digital assistants, video devices, desktops and laptops. | 12-03-2009 |
20100232483 | Calibration Correction for Implicit Beamforming in a Wireless MIMO Communication System - A first packet is transmitted via a forward channel corresponding to a signal direction from a first transceiver device to a second transceiver device, wherein the first packet includes a request to initiate calibration. A partial dimensional description of a reverse channel is determined based on the reception of a second packet received from the second transceiver device, wherein the second packet includes training information of spatial dimensions used for the transmission of the second packet but does not include training information for all available spatial dimensions of a reverse channel. A correction matrix is developed from the partial dimensional description of the reverse channel and a description of the forward channel, and the correction matrix and a steering matrix is used to process signals to be transmitted via the forward channel. | 09-16-2010 |
20100265931 | Range-Based Wireless Alarm System - A range-based alarm system comprised of a controlling device and a plurality of portable, handheld devices communicating over a wireless local area network (WLAN); wherein the controlling device frequently computes the distance between itself and the plurality of portable, handheld devices and raises an audible or visual alarm when one of the computed distances exceeds its programmed operating range. An audible or visual alarm is also triggered on any of a plurality of portable, handheld devices when it has lost communication with the controlling device or when instructed by the controlling device. | 10-21-2010 |
20100315952 | METHOD AND SYSTEM TO DETECT PACKETS OF DIFFERENT FORMATS IN A RECEIVER - A method and system of communicating packets and detecting packets are disclosed. In a first aspect, the method and system comprise enabling the detection of a very high throughput (VHT) signal field. The VHT signal field is distinguishable from other signal fields, wherein the VHT signal field allows for a backward compatibility with other devices. In a second aspect, the method and system comprise initializing the device to be in receive mode and receiving at least one signal field symbol and detecting the presence of additional signal field symbols. The method and system further include distinguishing a very high throughput (VHT) signal field from other signal field symbols and decoding the VHT signal field parameters uniquely describing the VHT packet format. | 12-16-2010 |
20100315953 | METHOD AND SYSTEM TO DETECT PACKETS OF DIFFERENT FORMATS IN A RECEIVER - A method and system of communicating packets and detecting packets are disclosed. In a first aspect, the method and system comprise enabling the detection of a very high throughput (VHT) signal field. The VHT signal field is distinguishable from other signal fields, wherein the VHT signal field allows for a backward compatibility with other devices. In a second aspect, the method and system comprise initializing the device to be in receive mode and receiving at least one signal field symbol and detecting the presence of additional signal field symbols. The method and system further include distinguishing a very high throughput (VHT) signal field from other signal field symbols and decoding the VHT signal field parameters uniquely describing the VHT packet format. | 12-16-2010 |
20110122856 | AUTONOMOUS WIRELESS COMMUNICATION SYSTEM AND METHOD OF USE - An autonomous wireless system is disclosed. The system comprises a plurality of devices. Each of the plurality of devices includes a wireless interface. At least two devices directly communicate with each other through a direct link between the wireless interfaces of the at least two devices. Methods and apparatus for two or more devices equipped with wireless local area network (WLAN) interface to communicate and exchange selected information are disclosed. Accordingly, a system and method in accordance with the present invention enables a handheld, laptop, smart phone or the like, which is equipped with a WLAN interface, to communicate and exchange business contact, sales brochures, event announcements, presentation materials, alert messages, etc., to other devices that include a WLAN interface. | 05-26-2011 |
20110122857 | AUTONOMOUS WIRELESS COMMUNICATION SYSTEM AND METHOD OF USE - An autonomous wireless system is disclosed. The system comprises a plurality of devices. Each of the plurality of devices includes a wireless interface. At least two devices directly communicate with each other through a direct link between the wireless interfaces of the at least two devices. Methods and apparatus for two or more devices equipped with wireless local area network (WLAN) interface to communicate and exchange selected information are disclosed. Accordingly, a system and method in accordance with the present invention enables a handheld, laptop, smart phone or the like, which is equipped with a WLAN interface, to communicate and exchange business contact, sales brochures, event announcements, presentation materials, alert messages, etc., to other devices that include a WLAN interface. | 05-26-2011 |
20110261740 | System And Method For Estimating Bandwidth Requirements Of And Allocating Bandwidth To Communication Devices Operating In A Network - A system including a base station and a plurality of stations. The base station is configured to estimate bandwidths used by the plurality of stations based on packets transmitted by the plurality of stations during a first period. The base station is further configured to selectively allocate timeslots to the plurality of stations for transmission of packets to the base station during a second period following the first period. Durations of the timeslots are based on the estimated bandwidths. The plurality of stations are configured to transmit packets to the base station in the timeslots during the second period. | 10-27-2011 |
20110261895 | Calibration Correction for Implicit Beamforming In a Wireless MIMO Communication System - A transmitter beamforming technique for use in a MIMO wireless communication system determines a partial description of a reverse channel without determining a full dimensional description of the reverse channel. A correction matrix is developed from the partial description of the reverse channel and a description of the forward channel. The correction matrix is used to process signals to be transmitted via the forward channel, and a steering matrix is used to perform beamforming in the forward channel. | 10-27-2011 |
20120093025 | METHOD AND SYSTEM FOR DETECTING PACKET TYPE - It is therefore an object of the present invention to provide a method for detecting different packet type. The method comprises, determining whether the rate of a received packet corresponds to a predetermined rate, derotating the bits of a symbol in the received packet, obtaining an energy different of the symbol at different axes, and determining the type of the received packet according to the energy difference. | 04-19-2012 |
20130177051 | CALIBRATION CORRECTION FOR IMPLICIT BEAMFORMING IN A WIRELESS MIMO COMMUNICATION SYSTEM - A transmitter beamforming technique for use in a MIMO wireless communication system determines a partial description of a reverse channel without determining a full dimensional description of the reverse channel. A correction matrix is developed from the partial description of the reverse channel and a description of the forward channel. The correction matrix is used to process signals to be transmitted via the forward channel, and a steering matrix is used to perform beamforming in the forward channel. | 07-11-2013 |
20130315050 | CHANNEL SOUNDING AND ESTIMATION STRATEGIES FOR ANTENNA SELECTION IN MIMO SYSTEMS - A method of antenna selection, in a MIMO system in which a transmitter having a first plurality of RF chains communicates with a receiver having a second plurality of RF chains, includes transmitting consecutive sounding packets produced by the first plurality of RF chains. The consecutive sounding packets each include a training symbol, and collectively sound a full-size channel for the MIMO system. The method also includes receiving channel state information for each of a plurality of scaled sub-channel estimates determined at the receiver. The channel state information includes at least one of respective gain factors that were applied to the consecutive sounding packets received at the receiver and respective scaling factors that were applied to sub-channel estimates determined at the receiver. The method also includes adjusting power levels applied to the first plurality of RF chains in response to receiving the channel state information. | 11-28-2013 |
20140294111 | CHANNEL SOUNDING AND ESTIMATION STRATEGIES IN MIMO SYSTEMS - In a system having a first communication device with a first plurality of radio-frequency (RF) chains coupled to a first plurality of antennas and a second communication device with a second plurality of RF chains coupled to a second plurality of antennas, the second communication device receives consecutive training packets that were transmitted by the first communication device, the consecutive training packets having been produced at the first communication device by a power level rule to the first plurality of RF chains. The second communication device determines respective channel measurements corresponding to the consecutive training packets based on the power level rule, and selects a transmit parameter based on the respective channel measurements, the transmit parameter to be used by the first communication device when transmitting to the second communication device. The second communication device transmits and indication of the selected transmit parameter to the first communication device. | 10-02-2014 |
Patent application number | Description | Published |
20080215171 | Vehicle for recording and reproducing digital data - An apparatus comprising a vehicle and a media player/recorder physically connected with the vehicle, the media player/recorder comprising a wireless receiver to receive a signal representing encoded media data; a storage device to store the encoded media data; a processor comprising a storage controller to retrieve the encoded media data from the storage device, and a digital signal processor to decode the encoded media data retrieved by the storage controller; and an output circuit to output the decoded media data from the processor. | 09-04-2008 |
20080253582 | Vehicle for recording and reproducing digital data - An apparatus includes a vehicle and a media player/recorder physically connected with the vehicle. The media player/recorder includes a wireless receiver to receive a signal representing media data, a storage device to store the media data, a storage controller to retrieve the media data from the storage device, and an output circuit to output the media data. The storage device stores a list of identifiers of desired media selections. The wireless receiver receives a signal representing an identifier of an offered media selection. The storage device stores the offered media selection when the identifier of the offered media selection corresponds to the identifier of one of the desired media selections. | 10-16-2008 |
20080255691 | Apparatus, method, and computer program for recording and reproducing digital data - A media player/recorder includes a wireless receiver to receive a signal representing media data, a storage device to store the media data, a storage controller to retrieve the media data from the storage device, and an output circuit to output the media data. The storage device stores a list of identifiers of desired media selections. The wireless receiver receives a signal representing an identifier of an offered media selection. The storage device stores the offered media selection when the identifier of the offered media selection corresponds to the identifier of one of the desired media selections. | 10-16-2008 |