Jae‐Kark Choi

National Institute of Standards and Technology

Papers

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About

Jae-Kark Choi is a leading researcher in wireless communications, specializing in millimeter-wave (mmWave) channel characterization and measurement system design. His primary contributions lie in developing advanced channel sounders for high-frequency bands, particularly the 60 GHz spectrum, which is critical for next-generation high-bandwidth applications like 5G and beyond. His most cited work, "Design and calibration of a double-directional 60 GHz channel sounder for multipath component tracking" (2017, 64 citations), details the creation of an untethered 8×16 MIMO channel sounder at NIST. This system employs a 4 GHz bandwidth pseudorandom bit sequence, enabling precise tracking of multipath components—a key challenge for mmWave propagation. By providing accurate, high-resolution measurements, Choi’s sounder supports standards development and enhances understanding of mmWave channels. His work is instrumental in shaping reliable, high-speed wireless networks, with impact reflected in citations from both academia and industry. Through rigorous calibration and innovative design, Choi has established himself as a pivotal figure in enabling the dense, directional communication links essential for future wireless systems.