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

Dipankar Shakya, Ting Wu, Michael E. Knox, Theodore S. Rappaport

Research output: Contribution to journalArticlepeer-review


Emerging applications such as wireless sensing, position location, robotics, and many more are driven by the ultra-wide bandwidths available at millimeter-wave (mmWave) and Terahertz (THz) frequencies. The characterization and efficient utilization of wireless channels at these extremely high frequencies require detailed knowledge of the radio propagation characteristics of the channels. Such knowledge is developed through empirical observations of operating conditions using wireless transceivers that measure the impulse response through channel sounding. Today, cutting-edge channel sounders rely on several bulky RF hardware components with complicated interconnections, large parasitics, and sub-GHz RF bandwidth. This brief 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. The IC is the world's first gigabit-per-second channel sounder baseband implemented in low-cost CMOS. The presented single-board system can be employed at both the transmit and receive baseband to study multipath characteristics and path loss. Thus, the single-board implementation provides an inexpensive and compact solution for sliding correlation-based channel sounding with 1 ns multipath delay resolution.

Original languageEnglish (US)
Article number9447829
Pages (from-to)3043-3047
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Issue number9
StatePublished - Sep 2021


  • 142 GHz
  • PN sequence
  • RF hardware
  • THz
  • XPD
  • channel sounder
  • mmWave
  • on-chip baseband
  • sliding correlation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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