Broadband Spatio-Temporal Channel Sounder for the 2.45 GHz ISM Band
Pirkl, Ryan J.
Durkin, Christopher J.
Durgin, Gregory D.
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This technical report describes the construction of a broadband spatio-temporal channel sounder operating at the 2.45 GHz frequency band. Based on the core 8-element receiver system provided by the Aerospace Corp., Georgia Tech graduate student researchers Chris Durkin and Ryan Pirkl designed and built new hardware that allows broadband RF channel sounding with increased mobility for measurement. Key contributions include a new high-speed pseudo-random noise (PN) generator for transmitting a broadband waveform, a vector RF signal generator for generating stable, programmable frequencies to drive receiver hardware, and spatio-temporal data acquisition software. This work is a continuation of the direction-finding research collaboration conducted by the Aerospace Corp. and the Propagation Group at the Georgia Institute of Technology. The new channel sounding system is capable of resolving multipath with up to 20 ns of time-of-arrival delay. To demonstrate this capability, Chapter 4 presents an example measurement conducted indoors at 2.45 GHz. The measurement system is shown capturing a channel sounding waveform with 100 MHz RF bandwidth on the 8 different antenna elements simultaneously.