Qualcomm Incorporated

Other

Ivan Fernandez

Mark S Wallace

Fuyun Ling

Nagabhushana T Sindhushayana

Jay Rod Walton

Naga Bhushan

Samir Salib Soliman

Parag Arun Agashe

J Rodney Walton

Alkinoos Hector Vayanos

Jay R Walton, Jr

Funyun Ling

Coding techniques for a (e.g., OFDM) communication system capable of transmitting data on a number of 'transmission channels' at different information bit rates based on the channels' achieved SNR. A base code is used in combination with common or variable puncturing to achieve different coding rates required by the transmission channels. The data (i.e., information bits) for a data transmission is encoded with the base code, and the coded bits for each channel (or group of channels with the similar transmission capabilities) are punctured to achieve the required coding rate. The coded bits may be interleaved (e.g., to combat fading and remove correlation between coded bits in each modulation symbol) prior to puncturing. The unpunctured coded bits are grouped into non-binary symbols and mapped to modulation symbols (e.g., using Gray mapping). The modulation symbol may be 'pre-conditioned' and prior to transmission.

Coding scheme for a wireless communication system

A method and apparatus for efficiently transmitting location assistance information to a mobile communication device over a control channel with a minimal impact on the capacity of the control channel. A position location server provides a difference between satellite locations which have been computed using Almanac data and then Ephemeris data. Sending only the difference between the locations and satellite clock corrections computed using the two different data types, the total amount of information to be transmitted to a mobile communication device is significantly reduced. Furthermore, by providing rate of change information, the method and apparatus allows the location assistance information to remain valid for a relatively long time after it is has been received by the mobile communication device.

Method and apparatus for efficient GPS assistance in a communication

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San Diego, CA, United States of America

Ivan Fernandez