Wireless receiver apparatus

Patent metadata

Field	Value
Publication number	US-2021320750-A1
Application number	US-202117230323-A
Country	US
Kind code	A1
Filing date	Apr 14, 2021
Priority date	Apr 14, 2020
Publication date	Oct 14, 2021
Grant date	—

Abstract

A BP detector of a wireless receiver apparatus reads a first parameter set or a second parameter set. The first parameter set includes a plurality of scaling factors and a plurality of damping factors learned together using a deep learning technique. The second parameter set includes a plurality of scaling factors and a plurality of node selection factors learned together using a deep learning technique from a memory. The BP detector executes an iterative BP algorithm that uses the first parameter set or the second parameter set in order to perform multi-user detection.

First claim

What is claimed is:

1 . A wireless receiver apparatus comprising:
at least one memory configured to store a first parameter set or a second parameter set, the first parameter set including a plurality of scaling factors and a plurality of damping factors learned together using a deep learning technique, the second parameter set including a plurality of scaling factors and a plurality of node selection factors learned together using a deep learning technique; and a BP detector configured to execute an iterative Belief Propagation (BP) algorithm that uses the first parameter set or the second parameter set in order to perform multi-user detection.

2 . The wireless receiver apparatus according to claim 1 , wherein
the BP detector is configured to use the scaling factors in different respective iterations of the iterative BP algorithm, and the BP detector is configured to use the damping factors, or the node selection factors, in the different respective iterations of the iterative BP algorithm.

3 . The wireless receiver apparatus according to claim 1 , wherein
the first parameter set, or the second parameter set, comprises a plurality of subsets that correspond to different total numbers of iterations, and the BP detector is configured to use in the iterative BP algorithm a subset that corresponds to a configured number of iterations.

4 . The wireless receiver apparatus according to claim 1 , wherein
the BP detector is configured to use the second parameter set in the iterative BP algorithm, and each of the node selection factors is a real number value between 0 and 1.

5 . The wireless receiver apparatus according to claim 1 , wherein the BP detector comprises:
an interference canceller configured to use replicas of all transmitted signals, excluding an m-th transmitted signal, generated in a (t−1)-th iteration and subtract components of all the transmitted signals, excluding a component of the m-th transmitted signal, from an n-th received signal among a plurality of received signals, thereby generating a post-cancellation n-th received signal; a belief generator configured to generate a belief associated with the n-th received signal at least based on the damping factor or the node selection factor and based on the post-cancellation n-th received signal; and a replica generator configured to generate a replica of the m-th transmitted signal in a t-th iteration at least based on the scaling factor and the belief.

6 . A method performed by a wireless receiver apparatus, the method comprising:
reading a first parameter set or a second parameter set from a memory, the first parameter set including a plurality of scaling factors and a plurality of damping factors learned together using a deep learning technique, the second parameter set including a plurality of scaling factors and a plurality of node selection factors learned together using a deep learning technique; and executing an iterative Belief Propagation (BP) algorithm that uses the first parameter set or the second parameter set in order to perform multi-user detection.

7 . The method according to claim 6 , wherein the executing comprises:
using the scaling factors in different respective iterations of the iterative BP algorithm; and using the damping factors, or the node selection factors, in the different respective iterations of the iterative BP algorithm.

8 . The method according to claim 6 , wherein
the first parameter set, or the second parameter set, comprises a plurality of subsets that correspond to different total numbers of iterations, and the executing comprises using in the iterative BP algorithm a subset that corresponds to a configured number of iterations.

9 . The method according to claim 6 , wherein
the executing comprises using the second parameter set in the iterative BP algorithm, and each of the node selection factors is a real number value between 0 and 1.

10 . A non-transitory computer readable medium storing a program comprising instructions, which when executed on a processor of a wireless receiver apparatus causes the processor to:
read a first parameter set or a second parameter set from a memory, the first parameter set including a plurality of scaling factors and a plurality of damping factors learned together using a deep learning technique, the second parameter set including a plurality of scaling factors and a plurality of node selection factors learned together using a deep learning technique; and execute an iterative Belief Propagation (BP) algorithm that uses the first parameter set or the second parameter set in order to perform multi-user detection.

11 . The non-transitory computer readable medium according to claim 10 , wherein the executing comprises:
using the scaling factors in different respective iterations of the iterative BP algorithm; and using the damping factors, or the node selection factors, in the different respective iterations of the iterative BP algorithm.

12 . The non-transitory computer readable medium according to claim 10 , wherein
the first parameter set, or the second parameter set, comprises a plurality of subsets that correspond to different total numbers of iterations, and the executing comprises using in the iterative BP algorithm a subset that corresponds to a configured number of iterations.

13 . The non-transitory computer readable medium according to claim 10 , wherein
the executing comprises using the second parameter set in the iterative BP algorithm, and each of the node selection factors is a real number value between 0 and 1.

Assignees

• Nec Corp
• Univ Osaka
• The Doshisha

Inventors

• Muraoka Kazushi
• Ishii Naoto
• Takahashi Takumi
• Sampei Seiichi
• Ibi Shinsuke

Classifications

• H04L2025/03611

  Iterative algorithms · CPC title

• H04L25/0328

  with interference cancellation circuitry (adaptations for interference cancellation within a sequence estimator H04L25/03305; interference related aspects of direct sequence spread spectrum H04B1/7097; interference related aspects of frequency hopping spread spectrum H04B1/715; see also H04B1/10) · CPC title

• H04L25/03165 Primary

  using neural networks · CPC title

• H03M13/1111

  Soft-decision decoding, e.g. by means of message passing or belief propagation algorithms · CPC title

• H04L1/0057

  Block codes (H04L1/0061, H04L1/0064 take precedence) · CPC title