The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2013
Filed:
Oct. 30, 2009
Mahesh Chowdhary, San Jose, CA (US);
Arun Kumar, Delhi, IN;
Manish Sharma, Noida, IN;
Ashutosh Pande, Noida, IN;
Mahaveer Jain, Rajastrian, IN;
Gagan Narula, Gwaziabad, IN;
Chinmay Agarwal, Uttar Pradesh, IN;
Kolin Paul, Delhi, IN;
Mahesh Chowdhary, San Jose, CA (US);
Arun Kumar, Delhi, IN;
Manish Sharma, Noida, IN;
Ashutosh Pande, Noida, IN;
Mahaveer Jain, Rajastrian, IN;
Gagan Narula, Gwaziabad, IN;
Chinmay Agarwal, Uttar Pradesh, IN;
Kolin Paul, Delhi, IN;
CSR Technology Holdings Inc., San Jose, CA (US);
Abstract
Methods and apparatuses for estimating a user's altitude with respect to the mean sea level are provided. According to some aspects, the present invention is able to estimate altitude in both open sky as well as in degraded GPS signal environments such as dense urban canyon environments where GPS performance is affected by fewer available satellites and/or multipath error. According to other aspects, the present invention uses data from a pressure sensor to estimate altitude, either with or without the use of GPS aiding data. According to further aspects, estimated altitude is integrated with other types of dead reckoning data to provide user context detection pertaining to changes of altitude.