Telefonaktiebolaget LM Ericsson has been granted a patent for improved belief propagation (BP) decoding methods and apparatuses. The method involves updating messages based on a first and second table to enhance decoding accuracy when initial BP decoding is unsuccessful. GlobalData’s report on Telefonaktiebolaget LM Ericsson gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Telefonaktiebolaget LM Ericsson, IoT-5G convergence was a key innovation area identified from patents. Telefonaktiebolaget LM Ericsson's grant share as of January 2024 was 52%. Grant share is based on the ratio of number of grants to total number of patents.

Improved belief propagation decoding method

Source: United States Patent and Trademark Office (USPTO). Credit: Telefonaktiebolaget LM Ericsson

A recently granted patent (Publication Number: US11886418B2) discloses a method performed by a receiver involving belief propagation (BP) decoding on received information. In cases where the initial BP decoding is unsuccessful, the method includes obtaining a second table based on left-to-right and right-to-left messages associated with nodes of processing elements, searching for conflict verification processing elements, and updating the messages accordingly. If the updated decoding remains unsuccessful, the method involves searching for additional conflict verification processing elements and adjusting the signs of the messages to facilitate successful decoding. The method utilizes logarithmic likelihood ratios for message calculations and involves a systematic process for identifying and resolving conflicts in the decoding process.

Furthermore, the patent also describes a receiver comprising processors and memories with computer program codes configured to implement the aforementioned method. The receiver is designed to perform BP decoding, handle unsuccessful decoding scenarios, search for conflict verification processing elements, and update message tables for efficient decoding. By utilizing a systematic approach to identify conflicts and adjust message signs, the receiver aims to improve the accuracy and reliability of the decoding process. The method outlined in the patent offers a structured and effective way to address decoding challenges, ensuring optimal performance in processing received information.

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