From 1d3223257cb8ad89fbecf3def8e5912995f6bee6 Mon Sep 17 00:00:00 2001 From: Ushasi Ghosh <39842627+ushasigh@users.noreply.github.com> Date: Mon, 6 May 2024 17:44:25 -0700 Subject: [PATCH] Create 2023-01-26-dpa --- _posts/2023-01-26-dpa | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 _posts/2023-01-26-dpa diff --git a/_posts/2023-01-26-dpa b/_posts/2023-01-26-dpa new file mode 100644 index 00000000000..770b124402c --- /dev/null +++ b/_posts/2023-01-26-dpa @@ -0,0 +1,33 @@ +--- +layout: publication +title: "mmFlexible: Flexible Directional Frequency Multiplexing for Multi-user mmWave Networks" +short_title: "mmFlexible" +tags: Communications +cover: /assets/images/pubpic/dpa.png +authors: "Ish Kumar Jain, Rohith Reddy Vennam, Raghav Subbaraman, and Dinesh Bharadia" +conference: "Infocom 2023" +paper: /files/mmflexible.pdf +video: https://www.youtube.com/embed/Xo1JbZHfBCY +slides: /files/slides_mmflexible.pdf +github: https://github.com/ucsdwcsng/dpa +press: + date: "June 15, 2023" + url: https://today.ucsd.edu/story/uc-san-diego-researchers-present-new-wireless-system-for-greater-5g-access + headline: "UC San Diego Researchers Present New Wireless System for Greater 5G Access" +press2: + date: "May 18, 2023" + url: https://techxplore.com/news/2023-05-wireless-greater-5g-access.html + headline: "Researchers Present New Wireless System for Greater 5G Access" +press3: + date: "May 18, 2023" + url: https://www.sciencedaily.com/releases/2023/05/230518120909.htm + headline: "New Wireless System for Greater 5G Access" +press4: + date: "May 22, 2023" + url: https://www.inceptivemind.com/researchers-introduce-new-wireless-system-greater-5g-access/30839/ + headline: "Researchers Introduce New Wireless System for Greater 5G Access" +poster: files/dpa_hotmobile.pdf +dataset: https://github.com/ucsdwcsng/mMobile +osd: "Our dataset which consists of multiple indoor and outdoor experiments for up to 30 m gNB-UE link. In each experiment, we fixed the location of the gNB and move the UE with an increment of roughly one degrees. The table above specifies the direction of user movement with respect to gNB-UE link, distance resolution, and the number of user locations for which we conduct channel measurements. Outdoor 30 m data also contains blockage between 3.9 m to 4.8 m. At each location, we scan the transmission beam and collect data for each beam. By doing so, we can get the full OFDM channels for different locations along the moving trajectory with all the beam angles. Moreover, we use 240 kHz subcarrier spacing, which is consistent with the 5G NR numerology at FR2, so the data we collect will be a true reflection of what a 5G UE will see." +--- +Modern mmWave systems have limited scalability due to inflexibility in performing frequency multiplexing. All the frequency components in the signal are beamformed to one direction via pencil beams and cannot be streamed to other user directions. We present a new flexible mmWave system called mmFlexible that enables flexible directional frequency multiplexing, where different frequency components of the mmWave signal are beamformed in multiple arbitrary directions with the same pencil beam. Our system makes two key contributions: (1) We propose a novel mmWave front-end architecture called a delay-phased array that uses a variable delay and variable phase element to create the desired frequency-direction response. (2) We propose a novel algorithm called FSDA (Frequency-space to delay-antenna) to estimate delay and phase values for the real-time operation of the delay-phased array. Through evaluations with mmWave channel traces, we show that mmFlexible provides a 60-150% reduction in worst-case latency compared to baselines.