MIMO Room Impulse Response Analysis And Synthesis Through A Modal-domain Approach: Application To A Reverberation Chamber

A computational pipeline for modal analysis and syn- thesis of room impulse responses (RIRs) is presented, with application to a reverberation chamber. Modal frequencies and damping coefficients are estimated from measured RIRs using a sub-band least-squares complex frequency-domain (LSCF) algorithm. Syn- thesis is performed as a direct modal sum in the time domain. The method extends previous single-channel work to a multiple-input multiple-output (MIMO) setting comprising 36 source–receiver pairs. Poles extracted independently for each measurement are consolidated into a common frequency basis via a voting procedure across spatial positions. Residual amplitudes are then obtained for each measurement by banded least-squares fitting. The resulting para- metric model yields per-band T60 statistics with inter- measurement uncertainty. Reconstructed RIRs are validated against measurements in both frequency and time domains.