AOP Code: ETRI 029
Exp: 05/05/10
Categories: TECHNOLOGY
Industry: TECHNOLOGY - WIRELESS COMMUNICATION

COHERENT DUAL-CHANNEL QPSK MODULATOR/DEMODULATOR FOR CDMA SYSTEMS, AND MODULATING/DEMODULATING METHODS THEREFOR

This patent relates to technology used in a CDMA system through the use of Walsh-spreading means and codes.

Basis for Selection:

This patent is being asserted in a litigation.

Patent Number: US 5,960,029 | Latest Date for Prior Art: September 29, 1995

Filing Date of Patent: September 30, 1996 | Owner(s): Electronics and Telecommunications Research Institute

Description:

This Study involves research of a subset of the patent claims: claims are 1-5 and 14-18.

This Study is a request for prior art, preferably non-patent literature, that provides a path to invalidity for the Study patent claims that is not already known. The Reward is payable to an Advisor if the Study results in prior art that provides a path to invalidity that is not already known for claims 1-5 and 14-18.

One potential invalidity path may be a wideband CDMA system proposed by OKI. We recommend that Advisors identify publications about this system which are relevant to the specified claims.

Prior art filed in a pending reexamination proceeding (10/010,454) for this patent is not eligible for the Reward:

U.S. Patent No. 5,103,459 to Gilhousen, et al.
U.S. Patent No. 5,235,614 to Bruckert, et al.
U.S. Patent No. 5,418,813 to Schaffner, et al.
U.S. Patent No. 5,712,869 to Lee, et al.
TIA/EIA PN-3421 Ballot Version, �Mobile Station � Base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System� (�IS-95-A Draft Standard�).