Patent Number: 7,787,885

Title: Walsh code expansion in wireless communications systems

Abstract: A system and method for expanding traffic channels in a wireless communications system, such as CDMA2000, includes a method for generating a forward link signal including encoding each of a first set of channels with a mutually corresponding channel code, such as a Walsh code, selected from a predetermined set of channel codes, and encoding each of a second set of channels with the same mutually corresponding channel codes. A scramble code is applied to the encoded second set of traffic channels, which is combined with the encoded first set of traffic channels to form an extended forward link signal. Each channel code corresponds to two forward link channels, which are selectively decoded using the scramble code.

Inventors: Mansour; Nagi A. (Arlington, VA)

Assignee: Nextel Communications Inc.

International Classification: H04W 72/00 (20090101)

Expiration Date: 8/31/12018