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Maximum Likelihood Detector

A possibility, detector technology, applied in the direction of preventing/detecting errors through diversity reception, baseband system components, diversity/multi-antenna systems, etc., can solve problems such as long computational time delay, cost, etc.

Active Publication Date: 2020-06-16
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, exhaustive search is not an efficient search method, because it takes a long time to calculate processing latency (Processing Latency), complexity (Complexity) and computing power (Computation Power) because it calculates all possible solutions

Method used

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Embodiment Construction

[0024] The terminology in the following description refers to the customary terms in the technical field. If some terms are explained or defined in this manual, the explanation of this part of the terms shall be based on the description or definition in this manual.

[0025] The disclosed content of the present invention includes the maximum possibility detector and detection method, and the wireless signal receiver adopting the maximum possibility detection, which uses bit (Bit) as the unit and outputs the corresponding logarithm in soft decision (Soft Decision) mode A likelihood ratio (Log Likelihood Ratio; LLR) is used as an input value of a decoding circuit for error correction. Individually speaking, some components of these detectors and receivers may be known components. On the premise of not affecting the full disclosure and practicability of the invention, the details of individual known components will be omitted in the following description; in addition, the The met...

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Abstract

The present invention relates to a maximum likelihood detector and a maximum likelihood detection method. The maximum likelihood detector comprises a searching value selection circuit and a maximum likelihood detection circuit. The maximum likelihood detection circuit is configured to execute the following at least steps: selecting K first layers of candidate signal values according to the receiving signals and derivation signals, channel estimation signals or derivation signals thereof and the first layer of searching values; calculating K second layers of candidate signal values according to the K first layers of the candidate signal values; determining whether P second layers of the supplemented candidate signal values are added or not according to the K second layers of the candidate signal values, and generating a determination result; if the determination result is yes, calculating a log-likelihood ratio according to the K first layers of the candidate signal values, the K second layers of the candidate signal values, the P first layers of the candidate signal values and the P second layers of the candidate signal values; and if the determination result is no, calculating the log-likelihood ratio according to the K first layers of the candidate signal values and the K second layers of the candidate signal values.

Description

technical field [0001] The present invention relates to wireless signal reception, in particular to wireless signal reception using maximum likelihood detection. Background technique [0002] In the application of wireless communication, the user's demand for high data transmission rate is increasing day by day. How to effectively improve the bandwidth usage efficiency within the limited system bandwidth, and then improve the system throughput (Throughput; TP) has always been a challenge for various businesses. research topics. Under the market trend, the spatial multiplexing (Spatial Multiplexing) transmission method under Multiple-Input Multiple-Output (MIMO) can greatly increase the system throughput without increasing the bandwidth, so this transmission method It has attracted considerable attention in recent years. [0003] The spatial multitasking transmission method mainly uses multiple antennas at the transmitting end to transmit mutually independent signals on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/08H04L1/00H04L1/06H04L25/02
CPCH04B7/0413H04B7/08H04L1/0054H04L1/06H04L25/0242
Inventor 张仲尧林专湖杨易洵
Owner REALTEK SEMICON CORP