Invention Application
US20080075150A1 Reverse link correlation filter in wireless communication systems
失效
无线通信系统中的反向链路相关滤波器
- Patent Title: Reverse link correlation filter in wireless communication systems
- Patent Title (中): 无线通信系统中的反向链路相关滤波器
-
Application No.: US11901571Application Date: 2007-09-17
-
Publication No.: US20080075150A1Publication Date: 2008-03-27
- Inventor: Antoine Rouphael , John Hoffmann , George Nelson , Samir Patel , James Proctor , Daniel Riley
- Applicant: Antoine Rouphael , John Hoffmann , George Nelson , Samir Patel , James Proctor , Daniel Riley
- Applicant Address: US DE Wilmington 19810
- Assignee: InterDigital Technology Corporation
- Current Assignee: InterDigital Technology Corporation
- Current Assignee Address: US DE Wilmington 19810
- Main IPC: H04B1/69
- IPC: H04B1/69

Abstract:
A single, common correlation filter (CF) core is provided in a receiver for recovery of data from received code division multiple access (CDMA) signals. Signals are received over CDMA channels with different data rates, where the received signals include user information such as pilot and data symbols that have been spread according to different despreading rates including tier 1, tier 2 and tier 3 rates, where tier 1 is the smallest despreading rate. The received signal is correlated at the smallest despreading rate in the correlation filter (CF) by time multiplexing delayed versions of the pseudorandom noise (PN) code. The correlated information is then demultiplexed and pilot-aided QPSK demodulated. The demodulated information is summed at the proper integer multiple of the tier 1 rate to achieve tier 2 and tier 3 despreading rates. According to an embodiment, the three strongest multipaths components in terms of the received power are selected in a window or time period for optimal information recovery.
Public/Granted literature
- US07613227B2 Reverse link correlation filter in wireless communication systems Public/Granted day:2009-11-03
Information query