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Measurement method for OFDM system frequency offset under high speed environment and application and measurement device thereof

A measurement method and technology of a measurement device, applied in the field of communication, capable of solving problems such as inaccurate coarse frequency offset

Inactive Publication Date: 2018-01-23
西安宇飞电子技术有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0023] However, the coarse frequency offset calculated by the above prior art is inaccurate

Method used

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  • Measurement method for OFDM system frequency offset under high speed environment and application and measurement device thereof
  • Measurement method for OFDM system frequency offset under high speed environment and application and measurement device thereof
  • Measurement method for OFDM system frequency offset under high speed environment and application and measurement device thereof

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Embodiment Construction

[0074] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be constrained by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0075] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or mo...

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Abstract

The invention relates to a measurement method for OFDM system frequency offset under the high speed environment and an application and a measurement device thereof. The method comprises the followingsteps that S110, a synchronization signal is received; S120, coarse frequency offset deltafcoarse is calculated according to the phase difference of two adjacent segments of sequences of the synchronization signal; S130, pilot frequency is acquired, and the pilot frequency is transformed to the time domain so as to acquire the current signal-to-noise ratio; S140, the signal-to-noise ratio is greater than the threshold S150, the pilot frequency of multiple symbols under the regular time slot is acquired, and measurement of fine frequency offset deltafoffset is performed through repeated correlation of the pilot frequency of multiple symbols; and S160, the target frequency offset deltafall=deltafcoarse + deltafoffset is calculated. According to the measurement method for the OFDM system frequency offset under the high speed environment, the accurate coarse frequency offset is provided and whether the basis of continuing frequency offset measurement is met is judged through the signal-to-noise ratio so that the accuracy of the target frequency offset can be greatly enhanced.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a measurement method, application and measurement device for frequency offset of an OFDM system in a high-speed environment. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplexing) is Orthogonal Frequency Division Multiplexing technology. In fact, OFDM is MCM (Multi Carrier Modulation), a type of multi-carrier modulation. The basic principle of OFDM is to decompose a high-speed data stream into N parallel low-speed data streams and transmit them simultaneously on N subcarriers. [0003] Frequency offset estimation, referred to as frequency offset estimation. The frequency offset is caused by the deviation between the local carrier frequencies of the transceiver equipment, the Doppler frequency shift of the channel, etc., and is composed of an integer multiple offset of the subcarrier spacing and a fractional multiple offset of the subcarrier spacin...

Claims

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Application Information

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IPC IPC(8): H04L27/00H04L27/26
Inventor 熊军郭晓峰夏传荣王立新
Owner 西安宇飞电子技术有限公司
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