Patent Number: 8,817,924

Title: Iterative pilot tone cancellation for improved channel estimation and decoding

Abstract: Channel estimation is performed in a wireless network through cell/antenna pair ranking and iterative soft cancellation of pilot signals. Cell classification and ordering may be ranked and grouped for purposes of improving performance by dedicating hardware resources to higher priority received signals. A metric may be computed to rank the pairs. One such metric is reference signal (RS) power. Pairs may also be grouped into groups of pairs. Groups may be ordered by time-frequency resource and designated as serving-cell groups or non-serving cell groups. Higher priority pairs may be assigned a higher number of iterations. Higher priority groups may be processed first. Pairs which fall below a certain power threshold may be assigned no iterations. Iterations are distributed among hardware blocks to improve processing efficiency. Iteration numbers and hardware assignments may be modified to reach a desired complexity constraint.

Inventors: Mallik; Siddhartha (San Diego, CA), Yoo; Taesang (San Diego, CA), Luo; Tao (San Diego, CA)

Assignee: Qualcomm Incorporated

International Classification: H03D 1/04 (20060101); H04B 7/00 (20060101)

Expiration Date: 8/26/12018