MIMO techniques exploit multipath signals from all directions. Unfortunately, this means that all the antennas can be jammed by a single co-channel blocker from any direction. Linear filtering techniques, that have an inverse, can be used to provide RF beamforming when combined with a baseband inverse without losing any of the multipath information. An example of such a filter includes the FFT/IFFT combination, shown in Fig. 6.4.1. Prior techniques have attempted to solve the MIMO co-channel blocker problem by providing nulls in individual directions . These techniques provide finite jammer rejection in only one spatial direction. These have been extended to handle multiple spatial blockers -. However, all these techniques use active circuits for spatial filtering, which limits the ability to handle co-channel interference.
|Original language||English (US)|
|Title of host publication||2021 IEEE International Solid-State Circuits Conference, ISSCC 2021 - Digest of Technical Papers|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||3|
|State||Published - Feb 13 2021|
|Event||2021 IEEE International Solid-State Circuits Conference, ISSCC 2021 - San Francisco, United States|
Duration: Feb 13 2021 → Feb 22 2021
|Name||Digest of Technical Papers - IEEE International Solid-State Circuits Conference|
|Conference||2021 IEEE International Solid-State Circuits Conference, ISSCC 2021|
|Period||2/13/21 → 2/22/21|
Bibliographical noteFunding Information:
This work was supported in part by the DARPA SPAR and the DARPA ALIGN programs.
© 2021 IEEE.
Copyright 2021 Elsevier B.V., All rights reserved.