Method and device for detecting answer signal

A technology of response signal and detection method, applied in the field of communication, can solve the problems of missing data blocks, high false alarm probability, base station retransmission, etc., to achieve the effect of improving system stability and throughput, and low false alarm probability

Active Publication Date: 2011-02-09
WUHAN HONGXIN TELECOMM TECH CO LTD
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Problems solved by technology

[0007] The existing technology judges whether the ACK / NACK is valid through the signal-to-noise ratio. This method can ensure a relatively high detection probability, but it is also accompanied by a high false alarm probability, so the base station may mistakenly detect the ACK / NACK. NACK signal, causing the base station to retransmit or miss data blocks

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  • Method and device for detecting answer signal
  • Method and device for detecting answer signal

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0050] The basic idea of ​​the acknowledgment (ACK / NACK) signal detection method provided by the embodiment of the present invention is to comprehensively consider the absolute power and signal-to-noise ratio of the received ACK / NACK signal to determine whether the ACK / NACK signal is valid.

[0051] see figure 1 , which is a flowchart of a method for detecting a response signal according to an embodiment of the present invention, the method specifically includes: ...

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Abstract

The invention discloses a method and a device for detecting an answer signal. The method comprises the following steps of: converting an answer signal vector received by an antenna into an equivalent pilot frequency vector; computing noise power and signal power according to the equivalent pilot frequency vector so as to obtain a signal-to-noise ratio; multiplying the signal-to-noise ratio by thesignal power and converting an obtained result into a numeric value represented by a logarithmic format; and judging whether the numeric value is more than or equal to a preset threshold value or notand determining that the answer signal is valid if the numeric value is more than or equal to the preset threshold value. According to the invention, the validness of an acknowledgment (ACK)/negativeacknowledgement (NACK) signal is determined by combining the signal-to-noise ratio of the signal with absolute power. Compared with the conventional detection method, the method of the invention has lower false-alarm probability, so that the stability and throughput of the system can be improved effectively.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for detecting a response signal. Background technique [0002] Long term evolution (LTE, long term evolution) is the 3G evolution system, or Evolved Universal Terrestrial Radio Access (E-UTRAN, Evolved Universal Terrestrial Radio Access Network), using technology based on Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency DivisionMultiplexing) air interface design, the subcarrier width is 15kHz, the variable system bandwidth is realized through different subcarrier numbers, and the variable system bandwidth of 1.4-20MHz can be realized. At the same time, according to different application scenarios, LTE supports two different cyclic prefix (CP) lengths, and their lengths are 4.7us and 16.7us respectively. [0003] see figure 1 , which is a schematic diagram of the implementation of an existing LTE multiple access mode. In the figur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16
Inventor 江世宇
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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