Stephan Orzada1, Mark E. Ladd1,2, and Andreas K. Bitz2
The
capability of multi-channel transmit systems to drive different waveforms in
the individual transmit channels results in an increased complexity for the SAR
supervision In this work we propose a method based on virtual observation
points (VOPs) to derive a conservative upper bound for the local SAR with a
reasonable safety margin without knowledge of the transmit phases of the
channels. In six different scenarios we demonstrate that the proposed method
can be superior to the simple worst case method often used when only amplitude
and no phase information is available.
