Communications and networking have experienced stunning advances in the last two decades. In the mid-1990s the Internet was still a novelty to most people, often accessed, if at all, using large desktop computers with no wireless capability. Today, we can access the Internet using smartphones, tablets, and laptops that communicate wirelessly at speeds many orders of magnitude faster than was possible twenty years ago. These advances are a direct result of basic communications research that has made it possible to transmit data faster, more efficiently, and more reliably, and to do so using smaller and more efficient integrated circuits.

I have been doing work on communications systems for several decades, with research on areas including power-efficient hardware implementation of communications algorithms, methods to make improved use of wireless spectrum, and approaches to increase the reliability of data transmitted over channels that are both noisy and rapidly changing.

Broader Interest Articles and Commentary

John Villasenor, “Ensuring Cybersecurity In Fintech: Key Trends And Solutions,Forbes, August 25, 2016

John Villasenor, “5 keys to ensure that the IoT is an Internet of secure things,Forbes Mexico, May 10, 2016 (in Spanish)

John Villasenor, “Five Lessons On The ‘Security Of Things’ From The Jeep Cherokee Hack,Forbes, July 27, 2015

Technical Papers

Przemyslaw Pawelczak, Shaunak Joshi, Sateesh Addepalli, John Villasenor, Danijela Cabric, “Impact of the Connection Admission Process on the Direct Retry Load Balancing Algorithm in Cellular Networks,” IEEE Transactions on Mobile Computing, Vol. 12, No. 9, pp. 1681-1696, September 2013.

John Villasenor, Yuxing Han, Daniel Wen, Esther Gonzalez, and Jianwen Chen, “The Information Rate of Modern Speech and It’s Implications for Language Evolution,” Proceedings of The Ninth International Conference on the Evolution of Language (Evolang 9), Kyoto, Japan, March 2012, pp. 376-383.

P. Monajemi, R. Sahasrabudhe, and J. Villasenor,“Scheduling in Heterogeneous Cellular Networks with Mobility,” 2012 Information Theory and Applications Workshop, San Diego, February 2012.

Weidong Hu, Jiangtao Wen, Weiyi Wu, Yuxing Han, Shiqiang Yang, and John Villasenor, “Highly Scalable Parallel Arithmetic Coding on Muti-Core Processors using LDPC Codes,” IEEE Transactions on Communications, Vol. 60, No. 2, pp. 289-194, February 2012.

Yuxing Han, Jiangtao Wen, Danijela Cabric and John Villasenor, “Probabilistic Estimation of the Number of Frequency-Hopping Transmitters,” accepted for publication in IEEE Transactions on Wireless Communications, Vol. 10, No. 10, pp. 3232-3240, October 2011.

Yuxing Han, Jiangtao Wen, Danijela Cabric and John Villasenor, “Using a Vector of Observations to Identify the Number of Frequency-Hopping Transmitters,” IEEE Communications Letters, Vol. 15, No. 3, pp. 299 – 301, March 2011.

Xinyu Zhang, Zhuoyuan Chen, Jiangtao Wen, Jianwei Ma, Yuxing Han and John Villasenor, “A Compressive Sensing Reconstruction Algorithm for Trinary and Binary Sparse Signals Using Pre-mapping,” Proceedings of 2011 IEEE Data Compression Conference (DCC), Snowbird, UT, March, 2011.

Esteban Valles, Richard Wesel, John Villasenor, Christopher Jones, and Marvin Simon, “Pilotless Carrier Phase-Synchronization via LDPC Code Feedback,” Proceedings of Milcom 2010, Oct. 2010.

Shaunak Joshi, Przemyslaw Pawelczak, Sateesh Addepalli, John Villasenor,and Danijela Cabric, “Connection Admission Versus Load Balancing,” Proceedings of IEEE Globecom 2010, MIAMI, Florida, USA, December 2010.

Y. K. Jang and J. Villasenor, “SINR improvement through reconfigurable antenna adaptation to handheld device orientation,” Proceedings of IEEE AP-S International Symposium, Toronto, Ontario, Canada, July 2010.

Yuxing Han, Jiangtao Wen, Danijela Cabric, Sateesh Addepalli, John Villasenor, “A probabilistic approach to identifying the number of transmitters in the presence of misdetection,” Proceedings of 2010 IEEE Int. Conf. on Com. (ICC), Cape Town, South Africa, June 2010.

Zhuoyuan Chen, Jiangtao Wen, Yuxing Han, John Villasenor, Shiqiang Yang, “A compressive sensing image compression algorithm using quantized DCT and noiselet information,” Proc. IEEE ICASSP 2010, Dallas, March 2010.