Method for performing positioning and an electronic device
AssigneeNokia Corporation
InventorsNiilo Sirola, Jari Syrjärinne
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Abstract
The invention relates to a method for performing positioning, in which a spread spectrum signal modulated with a repetition code and transmitted by satellites, is received. The method comprises the steps of performing acquisition to the received, spread spectrum modulated signal, measuring the code phase of the received, spread spectrum modulated signal, and receiving the ephemeris parameters of satellites which are used in the positioning. In the method an optimizing phase is performed in order to minimize a cost function. The cost function includes a fraction operator having an argument that includes at least one residual error.
Claims21
A method for performing positioning, comprising the steps of receiving a spread spectrum signal modulated with a repetition code and transmitted by satellites, performing an acquisition to the received spread spectrum modulated signal, measuring the code phase of the received spread spectrum modulated signal, receiving ephemeris parameters of satellites which are used in the positioning, determining a cost function, and performing an optimizing phase for minimizing the cost function, wherein the cost function includes a fraction operator having an argument that includes at least one residual error.
An electronic device comprising means for performing positioning, comprising means for receiving a spread spectrum signal modulated with a repetition code and transmitted by satellites;
- means for performing acquisition to the received spread spectrum modulated signal;
- means for measuring the code phase of the received spread spectrum modulated signal;
- means for receiving the ephemeris parameters of satellites to be used in the positioning, means for determining a cost function, and means for minimizing the cost function, wherein the cost function includes a fraction operator having an argument that includes at least one residual error.
Dependencies are inferred from the claim text.