Modem chip employing low complexity log likelihood ratio calculation and operating method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsJoohan Kim, Junyeong Seo, Youngseok Jung
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Abstract
A modem chip includes a radio frequency integrated circuit (RFIC) configured to receive a signal including channel state information, and a processor configured to determine a signal to interference ratio (SIR) of the received signal based on the channel state information. The processor selects a log likelihood ratio (LLR) calculation mode among at least two LLR calculation modes that differently calculate an LLR of the received signal, by comparing the SIR with at least one threshold, and decodes the received signal by calculating the LLR of the received signal based on the selected LLR calculation mode.
Claims20
A modem chip comprising:
- a radio frequency integrated circuit (RFIC) configured to receive a signal including channel state information;
- and
- a processor configured to:
- determine a signal to interference ratio (SIR) of the received signal based on the channel state information;
- select a log likelihood ratio (LLR) calculation mode among at least two LLR calculation modes that differently calculate an LLR of the received signal by comparing the SIR with at least one threshold;
- and
- decode the received signal by calculating the LLR of the received signal based on the selected LLR calculation mode.
An operating method of a modem chip, the operating method comprising:
- generating channel state information based on a received signal;
- determining a signal to interference ratio (SIR) of the received signal based on the channel state information;
- selecting a first threshold that is closest to the SIR among a plurality of thresholds;
- selecting a log likelihood ratio (LLR) calculation mode among at least two LLR calculation modes that differently calculate an LLR of the received signal based on the first threshold;
- and
- calculating the LLR of the received signal based on the selected LLR calculation mode.
A modem chip comprising:
- a radio frequency integrated circuit (RFIC) configured to receive a signal including channel state information;
- and
- a processor configured to generate a channel matrix corresponding to the received signal based on the channel state information, generate a linear detection matrix for detecting a transmission vector included in the received signal based on the channel matrix, and determine a signal to interference ratio (SIR) of the received signal based on the channel matrix and the linear detection matrix,
- wherein the processor selects a log likelihood ratio (LLR) calculation mode from among at least two LLR calculation modes that differently calculate an LLR of the received signal based on a first threshold that is closest to the SIR among a plurality of thresholds, and decodes the received signal by calculating the LLR of the received signal based on the selected LLR calculation mode.
Dependencies are inferred from the claim text.