Nxp Usa, Inc.

Julien Olivain

Joseph Charles Circello

Frederic Georges-Ferdinand Barghi

Olivier Jean

Iani Bogdan Almajan

Self-checking central processing unit (CPU) systems and methods are provided, in which the self-checking CPU systems include a core monitor that performs checking functions to monitor and verify the executions of a primary CPU. The primary CPU has a primary processor pipeline, and the core monitor has a checker pipeline that is parallel to the primary processor pipeline. The core monitor performs checking functions during each stage of the primary processor pipeline, where the type of each checking function is based on a corresponding type of function being performed by the primary CPU. For example, the core monitor may perform parity checking for data transfers and logical operations performed by the primary CPU, and residue checking for arithmetic instruction execution logic performed by the primary CPU.

Central processing unit system and method with improved self-checking

Various embodiments relate to a demodulator configured to receive a legacy signal and a secured signal using orthogonal frequency division multiplexing (OFDM) modulation, including: an analog to digital converter (ADC) configured to receive an OFDM modulated signal; an fast Fourier transform (FFT) unit configured to receive the output of the ADC; a frequency de-mapper configured to map the output of the FFT to legacy frame samples and secured signal samples including a secured hash; a sample to bit converter, a channel de-interleaver, and a channel decoder configured to process the legacy samples to produce a legacy frame; frame checking logic configured to check the validity of the legacy frame and produce a frame validity signal; a de-channelization module configured to convert the sample rate of secured signal samples; a channel decoder configured to decode the converted secured signal bits; a frame selector configured to select specific portions of the input legacy frame to produce a secured frame; a hash module configured to hash and encrypt the secured frame; a hash comparator configured to compare the received secured hash to the hashed and encrypted secured frame configured to produce a hash compare signal; and attack detection logic configured to determine when a received OFDM signal has been attacked based upon the hash compare signal.

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Grasse, France

Julien Olivain