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| Number | Title | Issue Date |
| 8160122 | Method and system for uplink communication A method for conserving bandwidth in a communication system includes spreading a data frame using a first pseudo-noise (PN) spreader. A broadcast frame is spread using a second PN spreader. A complex data stream having a first component and a second component is gen... | 04/17/2012 |
| 8121174 | Signal quality measurement system This disclosure relates to method, device and system for measuring signal quality in a communication system. An access point receives an uplink signal from a transmitter. The uplink signal contains a data portion and a result of a hash function. The uplink signal is... | 02/21/2012 |
| 8069402 | Error detection system This disclosure relates to method, device and system for detecting errors in a communication system. A signal is received from a transmitter at a receiver wherein the signal includes a data portion and a result of a hash function. The hash function is computed in pa... | 11/29/2011 |
| 8045598 | Controlling power in a spread spectrum system A technique and system is disclosed for controlling power in a spread spectrum system. A fast slot of a frame is received where the frame is divided into a number of fast slots. The received power is measured on the fast slot. A second fast slot is transmitted at a ... | 10/25/2011 |
| 7848272 | Slotted mode acquisition A method for conserving resources in a communication system includes entering an awake state from a sleep state at a first time, where the first time occurs a predetermined period prior to a communication event. The predetermined period is greater than or equal to a... | 12/07/2010 |
| 7782926 | Random phase multiple access communication interface system and method A method for communicating through a multiple access communication interface includes receiving a first signal from a first tag, where the first signal is spread using a predetermined pseudo-noise (PN) code, and further where the first signal includes first payload ... | 08/24/2010 |
| 7773664 | Random phase multiple access system with meshing A method of communicating through a random phase multiple access network is provided. A signal that has been spread using a pseudo-noise code and offset by a random timing offset and that contains payload data is received from a device. A destination is selected for... | 08/10/2010 |
| 7742775 | Random phase multiple access system with location tracking A method of determining the location of a communication tag in a random phase multiple access communication network is disclosed. A ranging request signal that is spread using a first pseudo-noise code and offset with a first random timing offset is transmitted at a... | 06/22/2010 |
| 7733945 | Spread spectrum with doppler optimization A method of compensating for doppler phase errors includes receiving a signal at a receiver wherein the signal is spread using a pseudo-noise code, dividing the signal into a plurality of smaller coherent units and then compensating for induced doppler phase errors ... | 06/08/2010 |
| 7639726 | Downlink communication A method for conserving bandwidth in a communication system includes spreading a data frame using a first pseudo-noise (PN) spreader. A broadcast frame is spread using a second PN spreader. A complex data stream having a first component and a second component is gen... | 12/29/2009 |
| 7593452 | Despreading spread spectrum data A method for de-spreading spread data includes receiving a data stream by multiple access communication where the received data stream is spread using a pseudo-noise (PN) code; multiplying a first portion of the received data stream including data from a first user ... | 09/22/2009 |
| 7593383 | Uplink transmitter in a random phase multiple access communication system A method for communicating through a multiple access communication interface includes receiving a first signal from a first tag, where the first signal is spread using a predetermined pseudo-noise (PN) code, and further where the first signal includes first payload ... | 09/22/2009 |
| 7526013 | Tag communications with access point A method of establishing communication at a tag includes calculating a metric for each of a plurality of automatic frequency control (AFC) hypotheses where the plurality of AFC hypotheses correspond to a timing used by an access point; based on the calculated metric... | 04/28/2009 |
