Abstract: A user equipment (UE) for a wireless time division duplex communication system which uses code division multiple access. The system communicates using communication bunts that have unique channelization codes and corresponding midamble codes where each midamble code is uniquely related to one or more channelization codes. The UE has a midamble detector which detects each midamble code in a received communication burst. A logic block determines the channelization codes related to each detected midamble and a channelization code detector detects channelization codes from among channelization codes determined by the logic block. A multiuser detection device recovers data from the received communication burst based on the detected channelization codes. Where all midamble codes are uniquely related to one channelization code, the channelization code detector is not needed.
Type:
Grant
Filed:
March 4, 2002
Date of Patent:
September 21, 2004
Assignee:
InterDigital Technology Corporation
Inventors:
Ariela Zeira, Eldad Zeira, Alexander Reznik, Stephen E. Terry
Abstract: In a disclosed embodiment, signal levels of the active sectors of an access terminal are compared with the signal level of the current serving sector of the access terminal. Next, a delta credit is accumulated. If a DRC lock bit is available, then an accumulated total credit is authorized to produce an authorized accumulated total credit. Afterwards, a new serving sector is identified from a pool of candidate sectors based on the signal levels of the active sectors and the authorized accumulated total credits.
Type:
Grant
Filed:
October 16, 2001
Date of Patent:
January 20, 2004
Assignee:
Qualcomm Incorporated
Inventors:
Qiang Wu, Nagabhushana Sindhushayana, Peter J. Black, Rajiv Vijayan, Rashid Attar