Invention Grant
- Patent Title: Pre-phase error correction
-
Application No.: US12421028Application Date: 2009-04-09
-
Publication No.: US08488650B2Publication Date: 2013-07-16
- Inventor: John D. Kaewell
- Applicant: John D. Kaewell
- Applicant Address: US DE Wilmington
- Assignee: InterDigital Technology Corporation
- Current Assignee: InterDigital Technology Corporation
- Current Assignee Address: US DE Wilmington
- Agency: Volpe and Koenig, P.C.
- Main IPC: H04B1/00
- IPC: H04B1/00

Abstract:
A CDMA communication system includes a signal processor which encodes voice and nonvoice signals into data at various rates, e.g. data rates of 8 kbps, 16 kbps, 32 kbps, or 64 kbps as I and Q signals. The signal processor selects a specific data rate depending upon the type of signal, or in response to a set data rate. When the signal is received and demodulated, the baseband signal is at the chip level. Both the I and Q components of the signal are despread using the conjugate of the pn sequence used during spreading, returning the signal to the symbol level. Carrier offset correction is performed at the symbol level. A lower overall processing speed is therefore required.
Public/Granted literature
- US20090196330A1 PRE-PHASE ERROR CORRECTION Public/Granted day:2009-08-06
Information query