Orthogonality and encapsulation for positioning and navigation signals
AssigneeQUALCOMM Incorporated
InventorsGuttorm Ringstad Opshaug, Rayman Wai Pon, Jie Wu, Naga Bhushan, Sven Fischer, Stephen William Edge
Life of this patent
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AssigneeQUALCOMM Incorporated
InventorsGuttorm Ringstad Opshaug, Rayman Wai Pon, Jie Wu, Naga Bhushan, Sven Fischer, Stephen William Edge
Estimating the term…
Mobile devices often use orthogonal frequency division multiplexing (OFDM) to calculate position information of mobile devices within the network. However, physical distance between the mobile device and a signal source for positioning and other environmental factors can influence the signal strength of received signals. Received signals at the mobile device that are stronger may drown out the weaker signals, particularly when two signal sources occupy the same symbol. In traditional OFDM, a signal source transmits the same symbol for each positioning occasion, so a weaker signal may never be detected over a stronger signal, reducing the accuracy of the positioning calculations. Described herein are systems and methods for using a pattern to vary the designated symbol for each signal source in a wireless network so that a weaker signal from a signal source may be detected on at least some of the positioning occasions.
A method for reducing collisions in transmitted wireless position measurement signals, the method comprising:
A method for enhanced detection of wireless position measurement signals from multiple base stations at a mobile device, the method comprising:
A base station for reducing collisions in transmitted wireless position measurement signals, the base station comprising:
A mobile device configured for enhanced detection of wireless position measurement signals from multiple base stations, the mobile device comprising:
Dependencies are inferred from the claim text.