UP	Paper 1516	US-W-K	AT BOTTOM
AWGN Performance of Superorthogonal Convolutional Codes
Butler,Brian		QUALCOMM, Inc. & University of Calif at San Diego
Abstract—The bit error rate performance of superorthogonal convolutional codes is examined for the AWGN channel with an emphasis on graphical error rate curves. The little-noticed generalization of the class of superorthogonal codes that allow for more parameter combinations is examined and found to have error rate performance than is primarily a function of constraint length and not code rate. Symbol puncturing of the codes is also briefly examined.
Brian K. Butler (S’90–M’90–SM’01) received the B.S. degree in engineering with High Distinction from Harvey Mudd College, Claremont, CA, in 1989, and the M.S.E.E. degree from Stanford University, Stanford, CA, in 1990. Presently, he is researching towards a Ph.D. in electrical engineering at the University of California at San Diego. He has worked at QUALCOMM, Inc., San Diego, CA, beginning in 1989 as an Engineering Intern and starting in 1990 as an Engineer. He has worked on a variety of CDMA system and product design projects. He performed system simulation, verification, and field testing of the early CDMA cellular system. He performed CDMA air-interface and ASIC design on the GLOBALSTAR LEO satellite project. He has contributed to the 3G CDMA air-interface designs, phone designs, and the ASIC designs over many generations. Since 1996, he has held the position of Vice President of Engineering. His areas of interest include wireless system design, applied modulation, coding, resource allocation, and receiver design. Mr. Butler holds 31 U.S. patents.