Patent ID: 11968064
Assignee: ZEKU TECHNOLOGY (SHANGHAI) CORP., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method comprising:
receiving a reference signal;
determining a noise estimation of the reference signal;
determining a distance metric and a log-likelihood ratio (LLR) of the determined noise estimation, wherein determining the distance metric and the LLR comprises:
decomposing the noise estimation based on Cholesky decomposition techniques; and
applying sphere decoding techniques; and

determining a final LLR based on the distance metric and the LLR of the noise estimation,
wherein determining the final LLR further comprises:
combining the LLR of the noise estimation with an LLR of another noise estimation; or
selecting the LLR of the noise estimation based on the distance metric of the noise estimation;

wherein the reference signal is a first reference signal, the noise estimation is a first noise estimation, the distance metric is a first distance metric, and the LLR is a first LLR, the method further comprising:
receiving a second reference signal;
determining a second noise estimation of the second reference signal;
determining a second distance metric and a second (LLR) of the second noise estimation; and
determining a combined noise estimate, wherein determining the combined noise estimate comprises:
combining the first LLR and the second LLR; or
determining that the second distance metric is nearer to a threshold value than the first distance metric; and determining the combined noise estimate according to the second noise estimation.