Apple Inc.

Hadi Afshar

Steve Hengchen Hsu

Mohanned Omar Sinnokrot

A cellular modem processor can include dedicated processing engines that implement specific, complex data processing operations. To implement PUSCH and PUCCH encoding, a cellular modem can include a pipeline having multiple processing engines, with each processing engine including functional units that execute instructions corresponding to different stages in the encoding process. Flow control and data synchronization between instructions can be provided using a hybrid of firmware-based flow control and hardware-based data dependency management.

Instruction-based multi-thread multi-mode PUSCH and PUCCH encoders for cellular data devices

A polar decoder circuit can execute successive cancellation list polar decoding on multiple threads concurrently. An LLR update engine of the polar decoder circuit and a sort engine of the polar decoder circuit can operate concurrently, with the LLR update engine computing updated path metrics for one codeword while the sort engine sorts candidates for one or more other codewords according to path metrics already computed by the LLR update engine. Threads corresponding to different codewords can cycle sequentially between the LLR update engine and the sort engine.

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San Diego, CA, United States of America

Hadi Afshar