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Signal-to-noise-ratio estimation method and device based on hard decisions

A technology of signal-to-noise ratio estimation and hard decision, applied in the field of communication, which can solve the problems of large error, low implementation complexity, and low calculation amount.

Active Publication Date: 2014-01-22
NUFRONT MOBILE COMM TECH
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Problems solved by technology

[0010] The implementation complexity of this algorithm is low, the amount of calculation is small, the error is small at high SNR, but the error is large at medium and low SNR

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  • Signal-to-noise-ratio estimation method and device based on hard decisions

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Embodiment Construction

[0063] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. These embodiments of the present invention may be referred to herein, individually or collectively, by the term "invention", which is for convenience only and is not intended to automatically limit the application if in fact more than one invention is disclosed The scope is any individual invention or inventive concept.

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Abstract

The invention discloses a signal-to-noise-ratio estimation method and device based on hard decisions and also discloses a method and device used for signal-to-noise-ratio estimation. Each hard-decision area on a planisphere is divided into two subareas which are different in hard-decision reliability in advance and a weighting factor corresponding to each subarea is set. When reception signals are available, a subarea which the reception signals belong to is determined and estimated transmission-signal power is corrected by using the weighting factor corresponding to the subarea and then the corrected power is used to estimate a signal-to-noise ratio so that errors in signal-to-noise-ratio estimation are reduced.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a method and device for estimating signal-to-noise ratio based on hard decisions, and a method and device for estimating signal-to-noise ratio. Background technique [0002] Signal-to-noise ratio (SNR, Signal Noise Ratio) is an important parameter to measure the quality of the received signal. Many applications need to use the signal-to-noise ratio as prior information to obtain the best performance, such as power control in communication systems, adaptive Coding and modulation, equalizer, error correction decoder, etc. [0003] The estimation method of signal-to-noise ratio is mainly divided into two categories: the first type is based on the estimation of known data assistance (DA, Data Aided) at the transmitting end, and the second type is based on the estimation without known data assistance at the transmitting end (NDA, Non-Data Aided). Aided), the second type is also ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/34H04L27/18
Inventor 鲍东山刘飞司宏伟朱定乾张健姜冰
Owner NUFRONT MOBILE COMM TECH
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