PIM cancellation adapt architecture
AssigneeXilinx, Inc.
InventorsHongzhi Zhao, Ghazaleh Ardeshiri, Xiaohan Chen, Hemang M. Parekh
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Abstract
Embodiments herein describe a circuit including a passive intermodulation (PIM) model circuit configured to process first data to generate a PIM interference model output to be concatenated with second data, the second data including a first carrier frequency and a second carrier frequency, and the circuit further including a PIM model adapt circuit configured to receive frequency shifted captured data and frequency shifted PIM models to generate updated values to compensate for PIM interference after the PIM interference model output is concatenated with the second data.
Claims20
A circuit comprising:
- a passive intermodulation (PIM) model circuit configured to process first data including a cyclic prefix portion and a data portion of an orthogonal frequency division multiplexing (OFDM) symbol to generate a PIM interference model output to be concatenated with second data, the second data including a first carrier frequency and a second carrier frequency;
- and
- a PIM model adapt circuit configured to receive frequency shifted captured data and frequency shifted PIM models during at least one of the cyclic prefix portion and the data portion based on corresponding trigger signals to generate updated values to compensate for PIM interference after the PIM interference model output is concatenated with the second data.
A method comprising:
- processing first data, by a passive intermodulation (PIM) model circuit, the first data including a cyclic prefix portion and a data portion of an orthogonal frequency division multiplexing (OFDM) symbol, to generate a PIM interference model output to be concatenated with second data, the second data including a first carrier frequency and a second carrier frequency;
- and
- receiving, by a PIM model adapt circuit, frequency shifted captured data and frequency shifted PIM models during at least one of the cyclic prefix portion and the data portion based on corresponding trigger signals to generate updated values to compensate for PIM interference after the PIM interference model output is concatenated with the second data.
Dependencies are inferred from the claim text.