Back to results
US 2009/0213953 A1Published application
Bit Log Likelihood Ratio (LLR) Computation of a 32-QAM System
AssigneeLegend Silicon Corp.
InventorHAIYUN YANG
Life of this patent
Estimating the term…
Abstract
A method and apparatus for computing and comparing the LLR of a 32-QAM mapping by splitting the mapping point to a most significant bit and four Least Significant Bits. Forming two groups based upon the characteristic of the most significant bit. Use the characteristics of an associated 16-QAM mapping to compute the four Least Significant Bits of the 32-QAM mapping.
Claims8
A computer-implemented method for determining a characteristic of a computed LLR result comprising the steps of:
- providing a 32-QAM mapping associated with a 16-QAM mapping with the 32-QAM mapping points having four least significant (LSB) bits and one most significant (MSB) bit;
- simplifying the computation of the four least significant (LSB) bits by using at least one characteristic of a pairing;
- and
- determining a received signal position in the mapping by associating the value of the received signal with a point in the 32-QAM mapping.
1 more element
Dependencies are inferred from the claim text.