Venkata Somi Alapati

US Patent:

8320967, Nov 27, 2012

Filed:

Dec 14, 2010

Appl. No.:

12/967967

Inventors:

Sairamesh Nammi - Dallas TX, US
Narendra Tilwani - Addison TX, US
Venkata Alapati - Frisco TX, US

Assignee:

Telefonaktiebolaget LM Ericsson (publ) - Stockholm

International Classification:

H04B 1/38

US Classification:

455561, 455436, 455450, 455451, 4554561, 370328, 370329, 370331, 370341

Abstract:

Multiple antennas at the transmitter and receiver increase the capacity in a wireless communication system. Received signal quality can be enhanced through diversity by transmitting the same symbol on multiple antennas. Data rate can be increased through multiplexing by transmitting different symbols on the transmitting antennas. Operating in one particular mode only is generally not suitable. Choosing diversity or multiplexing by taking into account the location of a user can enhance both throughput and reliability.

US Patent:

20020085521, Jul 4, 2002

Filed:

Apr 16, 2001

Appl. No.:

09/836454

Inventors:

Nishith Tripathi - Allen TX, US
Farid Khafizov - Plano TX, US
Venkata Alapati - Plano TX, US

International Classification:

H04B007/216
H04B007/212

US Classification:

370/335000, 370/342000, 370/348000, 370/431000

Abstract:

A method and apparatus for implementing a supplemental channel in an IS-2000 CDMA network includes a system that determines when to initiate a supplemental channel transmission, when to terminate a supplemental channel transmission, the period or duration of a supplemental channel, and, finally, the data rate of the supplemental channel. In short, an implementation for a supplemental channel is provided that considers the power capacity of the BTS, the desire to minimize interference, the desire to maximize revenue and the number of users, and the desire to minimize the probability of blocking (a user being denied access).