Speaker: Douglas Kirkpatrick, Eridan Communications
Wireless communications are ubiquitous in the 21 st century--we use them to read the newspaper, talk to our colleagues or children, watch sporting events or other forms of entertainment, and to monitor and control the environment we live in -- among just a few. This exponentiation of demand for wireless capacity has driven a new era of innovation in this space because spectrum and energy are expensive and constrained resources.
The future of wireless communications will demand leaps in spectrum efficiency, bandwidth efficiency, and power efficiency for successful technology deployments. Key applications that will fundamentally change how we interact with wireless systems and the demands we place on wireless technologies include Dynamic Spectrum Access Networks, massive MIMO, and the evasive unicorn of the "universal handset". While each of these breakthrough "system" capabilities make simultaneous demands of spectrum efficiency, bandwidth efficiency, and power efficiency, the current suite of legacy technologies forces system designers to make undesirable trade-offs because of the limitations of linear amplifier technology.
Eridan's solution is the antithesis of "linear". The Switch Mode Mixer Modulator (SMs3 ) technology emphasizes precision and flexibility, and simultaneously delivers spectrum efficiency, bandwidth efficiency, and power efficiency. The resulting capabilities dramatically increase total wireless capacity with minimum need for expanding operations into extended regions of the wireless spectrum.
This presentation will discuss the driving forces behind wireless system performance, the physics of linear amplifiers and SM3, measured performance of SM3 systems, and the implications for wireless system capabilities in the near future.
About the Speaker:
Dr. Kirkpatrick is the co-founder and CEO of Eridan Communications, Inc., a Santa Clara based company developing transceiver products for the next generations of wireless communications -- 5G and beyond. Dr. Kirkpatrick is also a founding General Partner of InnerProduct Partners (IPP), a San Francisco based early stage VC firm, and the acting CEO of a very early stage startup in rare-earth- free permanent magnets based in Cleveland. Previous to InnerProduct Partners, from 2010-2013 he was a partner at Vantage Point Capital Partners, a large multi- stage VC firm, also based in the San Francisco Bay area.
Dr. Kirkpatrick is a Fellow of the American Physics Society, a Member of the IEEE, and a Member of the Materials Research Society. Dr. Kirkpatrick holds a BS degree in Physics and Mathematics (1980) from the College of William and Mary and a Ph.D. in Physics from M.I.T. (1988).
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0:00 Introduction
0:45 Outline
2:36 Eridan "MIRACLE" Module
4:19 MIRACLE has a unique combination of properties.
4:57 Bandwidth Efficiency
6:31 Spectrum Efficiency
9:25 Software Radio - The Promise
11:15 Conventional wideband systems are not efficient.
11:37 MIRACLE: Combining Two Enablers
13:58 To Decade Bandwidth, and Beyond
15:11 Linear Amplifier Physics
16:02 Physics of Linear Amplifier Efficiency
16:19 Envelope Tracking
18:19 Switching: A Sampling Process
18:58 Switch-Mode Mixer Modulator
20:10 SM Functional Flow Block Diagram
23:32 Switch Resistance Consistency
24:56 Getting to "Zero" Output Magnitude
26:32 Operating Modes: L-mode, C-mode, and P-mode
30:02 "Drain Lag" Measurement
31:00 Fast Power Slewing: Solved
32:52 Fast-Agility: No Reconfiguration
35:35 SM Output Immune to Load Pull
37:12 Reduced Output Wideband Noise
38:02 Key Feature: Very Low OOB Noise
38:39 SM Inherent Stabilities
44:55 Dynamic Spectrum Access enables efficient spectrum usage.
45:10 Massive MIMO
45:19 Quick Review on m-MIMO
47:54 Maximizing Data Rate
47:57 Max Data Rate: Opportunity and Alternatives
48:52 Path Forward
49:45 24 bps/Hz in Sight?
50:52 Ever Wonder How?
52:22 Questions?
56:21 3rd Control Point
