Search Results for author: Theodore S. Rappaport

Found 14 papers, 1 papers with code

CmWave and Sub-THz: Key Radio Enablers and Complementary Spectrum for 6G

no code implementations26 Jun 2024 Mayur V. Katwe, Aryan Kaushik, Keshav Singh, Marco Di Renzo, Shu Sun, Doohwan Lee, Ana G. Armada, Yonina C. Eldar, Octavia A. Dobre, Theodore S. Rappaport

Sixth-generation (6G) networks are poised to revolutionize communication by exploring alternative spectrum options, aiming to capitalize on strengths while mitigating limitations in current fifth-generation (5G) spectrum.

Wideband Penetration Loss through Building Materials and Partitions at 6.75 GHz in FR1(C) and 16.95 GHz in the FR3 Upper Mid-band spectrum

no code implementations2 May 2024 Dipankar Shakya, Mingjun Ying, Theodore S. Rappaport, Hitesh Poddar, Peijie Ma, Yanbo Wang, Idris Al-Wazani

The 4--8 GHz FR1(C) and 7--24 GHz upper mid-band FR3 spectrum are promising new 6G spectrum allocations being considered by the International Telecommunications Union (ITU) and major governments around the world.

A Sub-Terahertz Sliding Correlator Channel Sounder with Absolute Timing using Precision Time Protocol over Wi-Fi

no code implementations2 Sep 2023 Dipankar Shakya, Hitesh Poddar, Theodore S. Rappaport

Additionally, a periodic drift correction algorithm is applied to eliminate PDP sample drift and achieve sub-nanosecond timing accuracy for MPC delays.

Waste Factor: A New Metric for Evaluating Power Efficiency in any Cascade

no code implementations2 Sep 2023 Mingjun Ying, Dipankar Shakya, Hitesh Poddar, Theodore S. Rappaport

Our study further explores how insertion loss of components in a cascaded communication system influences $W$ at 28 GHz and 142 GHz along with the data rate performance, evaluated using the consumption efficiency factor (CEF).

Towards a Low-SWaP 1024-beam Digital Array: A 32-beam Sub-system at 5.8 GHz

no code implementations19 Jul 2022 Arjuna Madanayake, Viduneth Ariyarathna, Suresh Madishetty, Sravan Pulipati, R. J. Cintra, Diego Coelho, Raíza Oliveira, Fábio M. Bayer, Leonid Belostotski, Soumyajit Mandal, Theodore S. Rappaport

Arithmetic complexity due to multiplication is reduced from the FFT complexity of $\mathcal{O}(N\: \log N)$ for DFT realizations, down to zero, thus yielding a 46% and 55% reduction in chip area and dynamic power consumption, respectively, for the $N=32$ case considered.

Dense Urban Outdoor-Indoor Coverage from 3.5 to 28 GHz

no code implementations8 Mar 2022 Dipankar Shakya, Dmitry Chizhik, Jinfeng Du, Reinaldo A. Valenzuela, Theodore S. Rappaport

For 28 GHz with 1 W/polarization transmit power in the urban street grid, the downlink data rates for 90% of outdoor users are estimated at over 250 Mbps.

Sub-Terahertz Channel Measurements and Characterization in a Factory Building

no code implementations8 Mar 2022 Shihao Ju, Yunchou Xing, Ojas Kanhere, Theodore S. Rappaport

Sub-Terahertz (THz) frequencies between 100 GHz and 300 GHz are being considered as a key enabler for the sixth-generation (6G) wireless communications due to the vast amounts of unused spectrum.

Super-Resolution

A Wideband Sliding Correlation Channel Sounder in 65 nm CMOS: Evaluation Board Performance

no code implementations12 Jun 2021 Dipankar Shakya, Ting Wu, Michael E. Knox, Theodore S. Rappaport

This paper presents a compact sliding correlation-based channel sounder baseband built on a monolithic integrated circuit (IC) using 65 nm CMOS, implemented as an evaluation board achieving a 2 GHz RF bandwidth.

140 GHz Urban Microcell Propagation Measurements for Spatial Consistency Modeling

no code implementations9 Mar 2021 Shihao Ju, Theodore S. Rappaport

Compared to the correlation distances reported in the 3GPP TR 38. 901 for frequencies below 100 GHz, the measured correlation distance of shadow fading at 142 GHz (3. 8 m) is much shorter than the 10-13 m as specified in 3GPP; the measured correlation distances of delay spread and angular spread at 142 GHz (both 12 m) are comparable to the 7-10 m as specified in 3GPP.

Information Theory Information Theory

Directional Radio Propagation Path Loss Models for Millimeter-Wave Wireless Networks in the 28-, 60-, and 73-GHz Bands

no code implementations1 Dec 2020 Ahmed Iyanda Sulyman, Abdulmalik Alwarafy, George R. MacCartney, Theodore S. Rappaport, Abdulhameed Alsanie

Fifth-generation (5G) cellular systems are likely to operate in the centimeter-wave (3-30 GHz) and millimeter-wave (30-300 GHz) frequency bands, where a vast amount of underutilized bandwidth exists world-wide.

A Wideband Sliding Correlator based Channel Sounder in 65 nm CMOS: An Evaluation Board Design

no code implementations28 Sep 2020 Dipankar Shakya, Ting Wu, Theodore S. Rappaport

Wide swaths of bandwidth at millimeter-wave (mmWave) and Terahertz (THz) frequencies stimulate diverse applications in wireless sensing, imaging, position location, cloud computing, and much more.

Cloud Computing

3-D Statistical Indoor Channel Model for Millimeter-Wave and Sub-Terahertz Bands

no code implementations27 Sep 2020 Shihao Ju, Yunchou Xing, Ojas Kanhere, Theodore S. Rappaport

Millimeter-wave (mmWave) and Terahertz (THz) will be used in the sixth-generation (6G) wireless systems, especially for indoor scenarios.

The Human Body and Millimeter-Wave Wireless Communication Systems: Interactions and Implications

1 code implementation19 Mar 2015 Ting Wu, Theodore S. Rappaport, Christopher M. Collins

With increasing interest in millimeter wave wireless communications, investigations on interactions between the human body and millimeter wave devices are becoming important.

Emerging Technologies

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