Brain recordings in large animal models and humans typically rely on a tethered connection, which has restricted the spectrum of accessible experimental and clinical applications. To overcome this limitation, we have engineered a compact, lightweight, high data rate wireless neurosensor capable of recording the full spectrum of electrophysiological signals… (More)
—Pseudochaotic time hopping (PCTH) is a recently proposed encoding/modulation scheme for ultra-wideband (UWB) impulse radio. PCTH exploits concepts from symbolic dynamics to generate aperiodic spreading sequences, resulting in a noise-like spectrum. In this paper, we present a multiple-access technique suitable for the PCTH scheme. In particular, we provide… (More)
Lal taught at three U.S. universities, including nine years at the University of Wisconsin-Madison, where he was a recipient of the Mabel Chipman Award for Faculty Excellence in Teaching and the Lawrence J. Larson Grant Award for Innovation in Curriculum Design. In 2013, he received the best teacher award at CMU's Qatar campus. As a graduate student, he… (More)
Multiple antenna approaches for wireless systems have been used for many years. By utilizing the complex diversity properties of the channel, they can mitigate the effects of fading and dramatically improve receiver performance in the presence of multipath . Unfortunately, these techniques can also dramatically raise the cost and DC power consumption of… (More)
Founded in 1995 by the University of California, San Diego and Industrial Participants, the Center for Wireless Communications collaborates to identify emerging opportunities, pursue basic research, and transfer relevant technology for subsequent commercialization.