Method and device for estimating carrier to interference plus noise ratio in orthogonal frequency division multiplexing system

A technology of carrier interference and interference noise, which is applied in the field of communication and can solve the problem that the carrier interference and noise ratio is larger than the estimation error.

Active Publication Date: 2014-07-02
ZTE CORP
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Problems solved by technology

[0015] The technical problem to be solved by the present invention is to provide a method and device for improving the accuracy of carrier-to-interference-to-noise ratio estimation in an OFDM system, so as to solve the problem of large estimation error of carrier-to-interference-to-noise ratio in the prior art

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  • Method and device for estimating carrier to interference plus noise ratio in orthogonal frequency division multiplexing system
  • Method and device for estimating carrier to interference plus noise ratio in orthogonal frequency division multiplexing system
  • Method and device for estimating carrier to interference plus noise ratio in orthogonal frequency division multiplexing system

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Embodiment Construction

[0060] In order to solve the problem of large estimation error of the carrier-to-interference-to-noise ratio in the prior art, the present invention provides a method and device for estimating the carrier-to-interference-to-noise ratio in an OFDM system. The following describes the present invention in conjunction with the drawings and embodiments For further details. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0061] Embodiment 1 of the present invention relates to a method for estimating carrier-to-interference-noise ratio in an OFDM system. In this embodiment, figure 1 The LTE downlink subframe structure shown is taken as an example for illustration. The basic transmission unit of LTE is 1 subframe with a time interval of 1 millisecond; figure 1 Among them, D represents the data subcarrier, and P i，j (i=1, 2, 3, 4, j=1, 2, . . . , K, K being the number of pilot s...

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Abstract

The present application discloses a method and device for estimating a carrier to interference and noise ratio in an orthogonal frequency division multiplexing system, which is comprised of dividing pilot sub-carriers of each pilot symbol in a sub-frame into groups, getting the second order difference of the estimated channel response value in each pilot sub-carrier group of each pilot symbol(S101); getting an interference and noise item in each pilot sub-carrier group of each pilot symbol according to the second order difference(S102); getting the average interference and noise power of pilot symbols in the sub-frame according to the interference and noise item of each pilot sub-carrier group(S103);getting the total average power of pilot symbols in the sub-frame(S104); getting the carrier to interference and noise ratio according to the average interference and noise power and the total average power(S105).The method and device provided by the present application can improve estimating accuracy of the carrier to interference and noise ratio.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for estimating carrier-to-interference-noise ratio in an orthogonal frequency division multiplexing system. Background technique [0002] In recent years, OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology, as a multi-carrier transmission technology, has attracted widespread attention. The OFDM technology converts the input serial data into parallel transmission data, and modulates the parallel data onto multiple sub-carriers, that is, sub-channels with orthogonality, and then transmits the modulated data. [0003] OFDM technology has been successfully applied to Asymmetric Digital Subscriber Line (ASDL, Asymmetric Digital Subscriber Line), Digital Audio Broadcasting (DAB, Digital Audio Broadcasting), HDTV (HDTV, High-definition Television), Wireless Local Area Network (WLAN, WirelessLocal Area Netwo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04B17/00
CPCH04L25/0228H04J11/0023H04L27/2647
Inventor 余秋星陈琼韩亚洁刘巧艳
Owner ZTE CORP
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