Patent Number: 8,719,658

Title: Accessing memory during parallel turbo decoding

Abstract: A method for accessing extrinsic information in a turbo decoder is disclosed. Operation phases for Forward State Metric Calculators (FSMCs) and Reverse State Metric Calculators (RSMCs) in multiple maximum a posteriori probability (MAP) decoders are misaligned differently based on whether a current half iteration is even or odd. First extrinsic information is read from a memory into the FSMCs and RSMCs using the misaligned operation phases. Second extrinsic information is determined using the MAP decoders. Each row of the second extrinsic information is stored to a different bank in the memory using the misaligned operation phases.

Inventors: Cui; Zhiqiang (San Diego, CA), Yao; Iwen (San Diego, CA), Huang; Qiang (San Jose, CA)

Assignee: QUALCOMM Incorporated

International Classification: G11C 29/00 (20060101); H03M 13/03 (20060101)

Expiration Date: 5/06/12018