Artimi, Inc. Patent applications |
Patent application number | Title | Published |
20090106810 | Ultra wideband communications protocols - A distributed reservation protocol for medium access control in a multiband OFDM ultrawideband communications network having a band group comprising a plurality of transmission bands, a device in said network having a mode in which it uses a selected one of said bands to communicate, and a band hopping mode, and wherein the protocol comprises allowing a device in a group of devices to make a combined time-frequency reservation, said time-frequency reservation comprising a reservation of a combination of a subset of said bands in a said band group and one or more data communications timeslots in which the device is allowed to use said reserved band for data communications such that multiple said devices in said group are able simultaneously to use one or more of the same or overlapping said reserved timeslots in different reserved frequency bands of said band group. | 04-23-2009 |
20080250160 | Address identification systems - We describe a method, particularly useful for a ultra wideband (UWB) network, to enable a first device to determine whether a device address used by a second device is intended to identify said first device, in a network with a variable topology in which a device address may change, the method comprising: transmitting, repeatedly, a beacon to said second device updating a said device address of said first device; storing a history of device addresses used by said first device; receiving, at said first device, a signal including an address and comparing the received device address with addresses in the history back in time for a period limited by a synchronisation refresh time which comprises a maximum time for which said second device may fail to receive said beacon from said first device without considering that said first device is no longer synchronised to said network. | 10-09-2008 |
20080212694 | Signal decoding systems - We describe a method of decoding a DCM (dual carrier modulation) modulated OFDM signal, the method comprising: inputting first received signal data representing modulation of a multibit data symbol onto a first carrier of said OFDM signal using a first constellation; inputting second received signal data representing modulation of said multibit data symbol onto a second, different carrier of said OFDM signal using a second, different constellation; determining a combined representation of said first and second received signal data, said combined representation representing a combination of a distance of a point representing a bit value of said multibit data from a constellation point in each of said different constellations; and determining a decoded value of a data bit of said multibit data using said combined representation. | 09-04-2008 |