Methods and apparatus for discontinuous transmission (DTX) detection
AssigneeMarvell Asia Pte Ltd
InventorsMurat Karabacak, Satya Phani Tej Nitalla, Chien-Meen Hwang, R A Nadisanka P. Rupasinghe
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Abstract
Methods and apparatus for control bit detection. In an exemplary embodiment, a method includes receiving a descrambled LLR sequence, decoding the descrambled LLR sequence to generate decoded bits, processing the decoded bits to generate a second LLR sequence, correlating the descrambled LLR sequence and the second LLR sequence to generate a correlated output, and detecting a discontinuous transmission (DTX) when the correlated output is less than a threshold level.
Claims22
A method, comprising:
- receiving a descrambled log-likelihood ratio (LLR) sequence;
- decoding the descrambled LLR sequence to generate decoded bits;
- processing the decoded bits to generate a second LLR sequence;
- correlating the descrambled LLR sequence and the second LLR sequence to generate a correlated output;
- and
- detecting a discontinuous transmission (DTX) when the correlated output is less than a threshold level.
An apparatus, comprising:
- re-encoder that re-encodes decoded bits to generate re-encoded bits;
- a log-likelihood ratio (LLR) regenerator that produces regenerated LLRs from the re-encoded bits;
- a correlator that correlates descrambled LLRs and the regenerated LLRs to generate a correlated output;
- and
- a comparator that compares the correlated output to a threshold value to determine a discontinuous transmission (DTX) DTX detection indicator.
An apparatus, comprising:
- a decoder interface that receives decoded bits;
- a receiver interface that receives descrambled log-likelihood ratios (LLRs);
- a processor that performs operations of:
- processing the decoded bits to generate a regenerated LLRs;
- correlating the descrambled LLRs and the regenerated LLRs to generate a correlated output;
- and
- detecting a discontinuous transmission (DTX) when the correlated output is less than a threshold level.
An apparatus, comprising:
- means for receiving a descrambled log-likelihood ratio (LLR) sequence;
- means for decoding the descrambled LLR sequence to generate decoded bits;
- means for processing the decoded bits to generate a second LLR sequence;
- means for correlating the descrambled LLR sequence and the second LLR sequence to generate a correlated output;
- and
- means for detecting a discontinuous transmission (DTX) when the correlated output is less than a threshold level.
Dependencies are inferred from the claim text.