How to solve the mutual interference between multiple modules of the intelligent controller PAC?

The mutual interference between multiple modules (such as CPU, DSP, FPGA, and I/O modules) within the intelligent controller PAC is mainly caused by power coupling, spatial radiation, and common impedance. The solution adopts partition isolation and filtering: each core module is configured with an independent power tree, and PWR series power inductors (such as PWR6045R6R8) and local LDOs are used for decoupling; PBZ2012E600Z0T ferrite beads (600Ω) are connected in series between the interface signal lines between modules, and π-type filter circuits are reserved; CMZ series common mode inductors (such as CMZ2012A-900T) are used for common mode isolation of the high-speed bus; structurally, modules are isolated by metal shielding partitions, and the partitions are connected to the chassis with low impedance; the common ground plane adopts a star connection to avoid current crossing; test verification shows that this solution can reduce crosstalk between modules within the PAC by more than 25dB, and the system can still pass the EN55032 Class A radiated emission test when running at full load;