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Parametric sequential decoding

A decoder and decoding tree technology, applied in the direction of encoding, code conversion, encoding components, etc., can solve the problems of insufficient flexibility of performance/complexity and achieve the effect of optimizing performance/complexity

Active Publication Date: 2021-06-11
INST MINES TELECOM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, in existing methods, the bias parameter is uniformly set for all levels of the decoding tree, regardless of the selection criteria of the bias parameter
In other words, the value of the bias parameter is the same for all tree levels, which makes it less flexible in terms of performance / complexity

Method used

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Embodiment Construction

[0050] Embodiments of the present invention provide for sequencing data signals received via a communication channel by searching for candidate nodes in the decoding tree according to a nearest grid point search problem and populating in parallel a sorted list or stack of previously explored paths of different lengths. Method and device for decoding. For purposes of illustration, the following description will be made with reference to a "stack", but equivalent data structures may be used.

[0051] The sequential decoding algorithm is a tree search based decoding algorithm based on a tree representation of the ML optimization problem (represented by a decoding tree) and on a tree search according to a best-first strategy. The sequential decoding algorithm uses a stack to store the best candidate grid points.

[0052] Sequential decoding techniques take into account the metrics determined for each expanded node of the decoding tree. Each node (component of candidate grid poin...

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Abstract

This paper discloses parametric sequential decoding. A decoder is provided for sequentially decoding data signals received over a transmission channel in a communication system, said data signals carrying transmitted symbols, said decoder comprising: a symbol estimation unit (301), which is Configured to determine estimated symbols representing transmitted symbols carried by the received signal from information stored in the stack, the symbol estimation unit (301) is configured to expand a selected node of a decoding tree comprising a plurality of nodes child nodes while filling the stack iteratively, each node of the decoding tree corresponds to a candidate component of a symbol of the data signal, and each node is assigned a metric, the stack is filled in each iteration with an extended set of child nodes And sorted by increasing value of the metric assigned to the nodes, the selected node for each iteration corresponds to the node in the stack that is assigned the lowest metric.

Description

technical field [0001] The present invention relates generally to digital communications, and more particularly to methods, systems and computer program products for sequentially decoding received data signals. Background technique [0002] Over the past few decades, major advances in the deployment of wireless communication systems providing different types of communication have been achieved. Wireless communication systems provide users with access to one or more resources (eg, bandwidth, transmit power, etc.). Different wireless communication systems are currently available, such as cellular and wireless ad hoc networks using a single antenna or multiple antennas accommodating single or multiple transmitters / receivers, eg MIMO (Multiple Input Multiple Output) systems. [0003] Apart from the low power consumption and memory requirements imposed by the system devices, a major challenge of wireless communication systems is the decoding of received signals. In fact, in a w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04B7/0456H04L1/00H04L25/03
CPCH04B7/0456H04B7/0854H04L1/0048H04L25/03891H04L25/03184H04L25/03203H03M13/1535H03M13/6508H03M13/6572H04L1/0052H04L25/03191H04L25/03305
Inventor A·梅杰里M-A·柯斯巴G·雷卡亚本-奥斯曼
Owner INST MINES TELECOM