Brian K. Butler, Ph.D. Wireless Engineer / CDMA
Brian is available for technical consulting. Please inquire.
Brian recently completed his Ph.D. in Electrical and Computer Engineering at UCSD, under Professor Paul H. Siegel. He has also received engineering degrees from Harvey Mudd College and Stanford University. He has 18 years of work experience at Qualcomm Incorporated. His Qualcomm work began in May 1989 with the start of the CDMA cellular project, doing link layer simulation and optimizing Viterbi decoder metrics in conjunction with non-coherent RAKE demodulation. From there his work grew to many diverse areas of CDMA, including: cell phone ASIC design, field testing, system design, and the LEO satellite system design. On many projects he was the lead system engineer or overall project engineer; these include the Globalstar mobile terminal, MSM2, MSM3000, MSM5000 (for 3G-cdma2000 1x), MSM5105 ASIC projects, the 1xEV-DV project, the E-UTRA (LTE) project. He is the co-inventor and lead proponent of the Quick Paging Channel of cdma2000 1x, also know as the paging indicator channel of WCDMA. He has made technical contributions on diverse groups of projects and divisions within Qualcomm. Brian held the title of Vice President of Engineering for nearly 10 years. He was responsible for department hiring and staffing of systems engineering in the ASIC division on many project areas (e.g., 1x, WCDMA/HSDPA, GSM/EDGE, GPS, 802.11b, OFDM broadcast) utilizing an overall labor budget growing to about $10M/year. Brian is a senior member of the IEEE and a co-inventor of over 38 issued US Patents.
Brian's recent research interest has been in Low Density Parity Check (LDPC) codes for error correction.