http://www.ece.ucsb.edu/wcsl/mmwcsresearch/ 2011-10-08T00:13:43-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/ http://www.ece.ucsb.edu/wcsl/mmwcsresearch/lib/images/favicon.ico text/html 2009-11-25T12:33:21-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=bnccomm_isit09&rev=1259181201&do=diff On Block Noncoherent Communication with Low-Precision Phase Quantization at the Receiver Authors: Jaspreet Singh and Upamanyu Madhow Conference: Proc. 2009 International Symposium on Information Theory (ISIT 2009). Abstract: We consider communication over the block noncoherent AWGN channel with low-precision Analog-to-Digital Converters (ADCs) at the receiver. For standard uniform Phase Shift Keying (PSK) modulation, we investigate the performance of a receiver architecture that quantizes o… text/html 2009-11-25T13:45:04-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=capqawgn_isit08&rev=1259185504&do=diff Capacity of the Discrete-Time AWGN Channel Under Output Quantization Authors: Jaspreet Singh, Onkar Dabeer and Upamanyu Madhow Conference: International Symposium on Information Theory (ISIT 2008), Toronto, July 2008. Abstract: We investigate the limits of communication over the discrete-time Additive White Gaussian Noise (AWGN) channel, when the channel output is quantized using a small number of bits. We first provide a proof of our recent conjecture on the optimality of a discrete input… text/html 2009-12-03T11:39:51-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=channelmodeling&rev=1259869191&do=diff The increasing demand for high-definition multimedia and high speed computer communications has led to the need for a new generation of wireless networks that support higher data rates. The 60 GHz band is considered to be a promising candidate for building such high speed, short range wireless networks for a number of reasons: it offers large swathes of unused bandwidth (57-64 GHz) and has a high spatial frequency reuse because of significant attenuation due to oxygen absorption. A fundamental u… text/html 2009-11-13T14:34:30-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=click_here&rev=1258151670&do=diff text/html 2009-12-04T18:24:45-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=comp_digmis&rev=1259979885&do=diff Comprehensive digital correction of mismatch errors for a 400 Msamples/s 80-dB SFDR time-interleaved analog-to-digital converter Authors: Munkyo Seo, Mark J. W. Rodwell and Upamanyu Madhow Journal: IEEE Trans. Microwave Theory and Techniques, vol. 53, no. 3, March 2005. text/html 2009-12-04T18:20:05-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=ctw06&rev=1259979605&do=diff Signal Processing with Low-Precision A/D Conversion : A Framework for Low-Cost Gigabit Wireless Communication Authors: Jaspreet Singh, Onkar Dabeer, Upamanyu Madhow Conference: 35th IEEE Communication Theory Workshop (CTW 06), Puerto Rico, May 2006. text/html 2009-11-25T12:05:10-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=eric_indoor_mmwave&rev=1259179510&do=diff Millimeter-Wave Spatial Multiplexing in an Indoor Environment Authors: Eric Torkildson, Colin Sheldon, Upamanyu Madhow, and Mark Rodwell Conference: First International Workshop on Multi-Gigabit MM-Wave and Tera-Hz Wireless Systems (MTWS'09). Abstract: A unique feature of communication at millimeter (mm) wave carrier frequencies is that spatial multiplexing is available for multiple-input multiple-output (MIMO) links with moderate antenna spacing even without a rich scattering environment. … text/html 2009-11-25T12:11:22-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=eric_robust_antenna_array&rev=1259179882&do=diff Nonuniform Array Design for Robust Millimeter-Wave MIMO Links Authors: Eric Torkildson, Colin Sheldon, Upamanyu Madhow, and Mark Rodwell Conference: IEEE Global Communications Conference 2009 (Globecom), Honolulu, Hawaii, November 2009. Abstract: Spatial multiplexing for millimeter (mm) wave line of sight (LOS) links potentially enables data rates of the order of 10-100 Gbps.Most prior work in this area has focused on uniform transmit and receive arrays, for which it is known that the spat… text/html 2009-11-25T12:19:50-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=icuwb09_spm&rev=1259180390&do=diff Multi-Gigabit Communication: the ADC Bottleneck Authors: Jaspreet Singh, Sandeep Ponnuru and Upamanyu Madhow Conference: 2009 IEEE International Conference on Ultra-Wideband (ICUWB 2009), Vancouver, September 2009. Abstract: The economies of scale in modern communication systems are enabled by architectures that take advantage of Moore’s law to implement most transceiver functionalities in digital signal processing (DSP). The bottleneck in scaling such “mostly digital” architectures to mu… text/html 2011-04-25T12:23:46-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=intfjrnl_ton2011&rev=1303759426&do=diff Interference Analysis for Highly Directional 60 GHz Mesh Networks: The Case for Rethinking Medium Access Control Authors: S. Singh, R. Mudumbai and U. Madhow Journal: IEEE/ACM TRANSACTIONS ON NETWORKING, 2011. Abstract: We investigate spatial interference statistics for multigigabit outdoor mesh networks operating in the unlicensed 60-GHz “millimeter (mm) wave” band. The links in such networks are highly directional: Because of the small carrier wavelength (an order of magnitude smaller tha… text/html 2009-11-14T20:27:58-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=joint_ofdm_tiadc&rev=1258259278&do=diff We consider OFDM transmission over a dispersive channel, where the data symbols are encoded onto orthogonal sub-carriers. text/html 2009-11-25T13:37:46-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=los60ghzmimo_iaps08&rev=1259185066&do=diff A 60GHz Line-of-Sight 2x2 MIMO Link Operating at 1.2Gbps Authors: Colin Sheldon, Eric Torkildson, Munkyo Seo, C. Patrick Yue, Upamanyu Madhow and Mark Rodwell Conference: IEEE Ant. and Prop. Int. Symp., San Diego, California, July 2008. Abstract: We report first experimental results from a hardware prototype of a millimeter wave lineof- sight (LOS) 2×2 MIMO link. The proposed architecture uses antenna element spacing derived from the principles of diffraction limited optics to establish mu… text/html 2009-11-25T13:48:27-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=lpadc_icc07&rev=1259185707&do=diff Communication Limits with Low Precision Analog-to-Digital Conversion at the Receiver Authors: Jaspreet Singh, Onkar Dabeer and Upamanyu Madhow Conference: IEEE International Conference on Communications (ICC'07), Glasgow, Scotland, June 2007. Abstract: We examine the Shannon limits of communication systems when the precision of the analog-to-digital conversion (ADC) at the receiver is constrained. ADC is costly and powerhungry at high speeds, hence ADC precision is expected to be a limiting… text/html 2010-01-26T11:15:42-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=lpadc_tcom09&rev=1264533342&do=diff On the Limits of Communication with Low-Precision Analog-to-Digital Conversion at the Receiver Authors: Jaspreet Singh, Onkar Dabeer and Upamanyu Madhow Journal: IEEE Transactions on Communications, December 2009. Abstract: As communication systems scale up in speed and bandwidth, the cost and power consumption of high-precision (e.g., 8-12 bits) analog-to-digital conversion (ADC) becomes the limiting factor in modern transceiver architectures based on digital signal processing. In this w… text/html 2010-06-04T13:40:36-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mdmac_infocom10&rev=1275684036&do=diff Distributed coordination with deaf neighbors: efficient medium access for 60 GHz mesh networks Authors: S. Singh, R. Mudumbai and U.Madhow Conference: Proc. IEEE Infocom 2010, San Diego, March 2010. Abstract: Multi-gigabit outdoor mesh networks operating in the unlicensed 60 GHz “millimeter (mm) wave” band, offer the possibility of a quickly deployable broadband extension of the Internet. We consider mesh nodes with electronically steerable antenna arrays, with both the transmitter and rec… text/html 2009-11-25T13:51:37-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwimagingsensornet&rev=1259185897&do=diff Millimeterwave Imaging Sensor Nets: A Scalable 60-GHz Wireless Sensor Network Authors: Munkyo Seo, Bharath Ananthasubramaniam, Mark Rodwell, and Upamanyu Madhow Conference: IEEE MTT-S Int. Microwave Symposium (IMS 2007), Hawaii, USA, June 2007. text/html 2010-01-24T09:51:10-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwmeshintf_infocom09&rev=1264355470&do=diff Medium Access Control for 60 GHz Outdoor Mesh Networks with Highly Directional Links Authors: R. Mudumbai, S. Singh and U.Madhow Conference: Proc. IEEE Infocom 2009, Mini-Conference, Rio de Janeiro, April 2009. Abstract: We investigate an architecture for multi-Gigabit outdoor mesh networks operating in the unlicensed 60 GHz “millimeter (mm) wave” band. In this band, the use of narrow beams is essential for attaining the required link ranges in order to overcome the higher path loss at mm … text/html 2009-12-04T00:51:24-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwmimo&rev=1259916684&do=diff The mm-wave MIMO architecture is designed to achieve optical data rates (~10 Gbps and higher) over point-to-point mm-wave wireless links. While spatial multiplexing requires rich scattering environments at lower carrier frequencies, it is available even in LoS environments for mm-wave links: due to the small wavelengths, transmitters at moderate separation see different enough array responses at the receiver so that parallel data streams sent from the transmitters can be separated using spatial… text/html 2009-12-04T00:41:03-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwmimo06&rev=1259916063&do=diff Millimeter-wave MIMO: Wireless Links at Optical Speeds Authors: Eric Torkildson, Bharath Ananthasubramaniam, Upamanyu Madhow, and Mark Rodwell Conference: IEEE Global Communications Conference 2009 (Globecom), Honolulu, Hawaii, November 2009. Abstract: We propose a new architecture for bridging the existing gap in speeds between wireless and optical links. The Millimeter Wave MIMO system employs “millimeter (mm) wave” spectrum in the E-band (70-95 GHz), which has been made available by the… text/html 2009-11-25T22:19:05-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwnetworking&rev=1259216345&do=diff The broad goal of this research is a comprehensive investigation of protocol design for directional outdoor and indoor mm wave networks. More specifically, our research on mm-wave networks focuses on the following: * modeling and establishing cross-layer design principles for medium access control, scheduling and routing for mm-wave networks * developing and employing simulation tools for evaluating the performance of ww-wave networks * just enough hardware prototyping to answer key quest… text/html 2009-11-09T18:19:19-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwnetworkingresearch&rev=1257819559&do=diff The broad goal of our research is a comprehensive investigation of protocol design for directional outdoor and indoor mm wave networks. More specifically, our research focuses on * modeling and establishing cross-layer design principles for medium access control, scheduling and routing * developing simulation tools for evaluating the performance of such networks, to be made widely available in an effort to engage a larger community in the design of next generation mm wave networks * “jus… text/html 2009-11-09T17:39:29-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwpan_infocom07&rev=1257817169&do=diff Millimeter Wave WPAN: Cross-Layer Modeling and Multihop Architecture Authors: S. Singh, F. Ziliotto, U. Madhow, E. M. Belding and M. Rodwell Conference: Proc. IEEE Infocom 2007, Minisymposium, Anchorage, AL, May 2007. Abstract: The 7 GHz of unlicensed spectrum in the 60 GHz band offers the potential for multiGigabit indoor wireless personal area networking (WPAN). With recent advances in the speed of silicon (CMOS and SiGe) processes, low-cost transceiver realizations in this “millimeter (m… text/html 2009-11-09T16:25:22-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwpan_jsac09&rev=1257812722&do=diff Blockage and Directivity in 60 GHz Wireless Personal Area Networks: From Cross-Layer Model to Multihop MAC Design Authors: S. Singh, F. Ziliotto, U. Madhow, E. M. Belding and M. Rodwell Journal: IEEE J. Select. Areas Commun.: Special Issue on Realizing Gbps Wireless Personal Area Networks, vol 27, no. 8, Oct. 2009. text/html 2010-03-30T10:37:48-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwreferences&rev=1269970668&do=diff Introductory references and surveys * N. Guo, R. C. Qiu, S. S. Mo, and K. Takahashi, “60-GHz Millimeter-Wave Radio: Principle, Technology, and New Results,” EURASIP J. Wirel. Commun. Netw., vol. 2007, no. 1, pp. 48–48, 2007. * S. K. Yong and C.-C. Chong, “An overview of multigigabit wireless through millimeter wave technology: potentials and technical challenges,” EURASIP J. Wirel. Commun. Netw., vol. 2007, no. 1, pp. 1–10, 2007. * P. F. M. Smulders, “Exploiting the 60 GHz Band for Loca… text/html 2011-04-23T12:36:35-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwresearchpaperlist&rev=1303587395&do=diff Journal Papers * S. Singh, R. Mudumbai and U. Madhow, "Interference analysis for highly directional 60 GHz mesh networks: the case for rethinking medium access control", IEEE/ACM Trans. Networking, 2011. * J. Singh, O. Dabeer, U. Madhow, "On the limits of communication with low-precision analog-to-digital conversion at the receiver", IEEE Transactions on Communication, 2010. text/html 2010-06-04T14:05:39-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwresearchtalkslist&rev=1275685539&do=diff * Distributed coordination with deaf neighbors: efficient medium access for 60 GHz mesh networks, presented at IEEE INFOCOM 2010, San Diego, CA, Mar. 2010. * Networking @ 60 GHz : The Emergence of MultiGigabit Wireless - Talk by Prof. U. Madhow at COMSNETS 2010. text/html 2009-11-25T12:38:07-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwsm_mtts09&rev=1259181487&do=diff Four-Channel Spatial Multiplexing Over a Millimeter-Wave Line-of-Sight Link Authors: Colin Sheldon, Munkyo Seo, Eric Torkildson, Mark Rodwell, and Upamanyu Madhow Conference: MTTS International Microwave Symposium, Boston, Massachusetts, June 2009. text/html 2009-11-25T13:27:44-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwsmlos_eumc09&rev=1259184464&do=diff Spatial multiplexing over a line-of-sight millimeter-wave MIMO link: a two-channel hardware demonstration at 1.2 Gbps over 41m range Authors: Colin Sheldon, Eric Torkildson, Munkyo Seo, C. Patrick Yue, Mark Rodwell, and Upamanyu Madhow Conference: European Microwave Conference (EuMC), Amsterdam, The Netherlands, October 2008. text/html 2010-06-04T13:30:27-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwwmeshresearch&rev=1275683427&do=diff While industry is pursuing multiGigabit indoor 60 GHz wireless personal area networks, there is immense potential for providing ubiquitous broadband connectivity using multiGigabit outdoor 60 GHz mesh networks. Figure 1 shows two deployment scenarios. text/html 2010-01-18T14:07:19-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=mmwwpanresearch&rev=1263852439&do=diff We develop a cross-layer modeling methodology and define a multihop medium access control (MAC) architecture, taking into account two key physical characteristics of mm-wave links: (1) directionality and (2) high susceptibility to blockage. We have developed models for mm-wave link blockage, which occurs routinely in indoor networks due to furniture, walls and moving humans, starting from the Huygens' principle. Our diffraction-based model determines the time-evolution of network link connectiv… text/html 2011-09-29T14:33:18-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=phydesign&rev=1317331998&do=diff The ongoing revolution in cellular and wireless LAN communication systems has been propelled by integrated circuit (IC) implementation of sophisticated DSP algorithms that perform the bulk of the receiver functionality, such as synchronization, channel estimation and equalization, demodulation and decoding. Riding on Moore's law, i.e., the exponential scaling down of per-transistor size and cost, such DSP-centric architectures have provided the economies of scale necessary for rapid mass market … text/html 2009-11-25T12:50:35-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=sandeep_ita09&rev=1259182235&do=diff Signal Processing for Multigigabit Communication Authors: P. Sandeep, Jaspreet Singh, and Upamanyu Madhow Conference: Information Theory and Applications Workshop, (ITA), February 2009, UC San Diego. Abstract: The sophisticated digital signal processing (DSP) at the core of modern communication receivers implicitly assumes the availability of accurate analog-to-digital converters (ADCs). As communication speeds scale up, however, high-rate, highprecision ADCs are either not available, or a… text/html 2009-12-04T18:13:54-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=spawc06&rev=1259979234&do=diff On the Limits of Communication Performance with One-bit A-D conversion Authors: Onkar Dabeer, Jaspreet Singh and Upamanyu Madhow Conference: Proc. IEEE Workshop on Signal Processing Advances in Wireless Communication (SPAWC 06) , Cannes, France, July 2006. text/html 2010-01-18T13:44:44-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=standardization_efforts_and_industry_consortiums&rev=1263851084&do=diff * IEEE 802.15 WPAN Task Group 3c (TG3c) Millimeter Wave Alternative PHY * IEEE 802.11ad: Very High Throughput in 60 GHz * Standard ECMA-387: High Rate 60 GHz PHY, MAC and HDMI PAL * WiGig Alliance * WirelessHD * Berkeley Wireless Research Center, UC Berkeley * IBM 60 GHz Research * Georgia Electronic Design Center (GEDC), Georgia Tech * Intel Communications Technology Lab, Hillsboro, OR * 60 GHz MIMO Group (Fraunhofer Heinrich Hertz Institute (HHI) and the Micro wave Elec… text/html 2011-09-29T14:14:00-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=start&rev=1317330840&do=diff Millimeter (mm) wave communication holds the key to the next phase of the ongoing wireless revolution, in which wireless catches up with wires in speed. The several gigahertz (GHz) of unlicensed spectrum in the 60 GHz “oxygen absorption” band, which is a part of the broader mm-wave band, is well-suited to short-range multiGigabit indoor (e.g., 10 meters range) and outdoor (e.g., 100-500 meters range) wireless links. Figure 1 shows the spectrum allocation around the 60 GHz band for some regions.… text/html 2009-11-25T13:20:56-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=tiadc_gc09&rev=1259184056&do=diff Joint Channel and Mismatch Correction for OFDM Reception with Time-interleaved ADCs: Towards Mostly Digital MultiGigabit Transceiver Architectures Authors: P. Sandeep, Upamanyu Madhow, Munkyo Seo, Mark Rodwell Conference: IEEE Global Communications Conference 2008 (Globecom), New Orleans, LA, 2008. text/html 2009-11-13T14:41:02-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=tiadc_mismatch&rev=1258152062&do=diff text/html 2009-11-25T12:46:29-07:00 http://www.ece.ucsb.edu/wcsl/mmwcsresearch/doku.php?id=uhd_icme09&rev=1259181989&do=diff Error correction scheme for uncompressed HD video over wireless Authors: M. Manohara, R. Mudumbai, J. Gibson and U. Madhow Conference: IEEE International Conference on Multimedia and Expo, 2009. ICME 2009. Abstract: Digital transmission of uncompressed high-definition video is challenging because of its high data rate and its extreme sensitivity to bit errors. In this paper we propose a simple error correction scheme to reduce the bit error effects in the video at the receiver end of a wire…