Carrier wave frequency deviation estimation method and system

A technology of carrier frequency offset and pilot subcarrier, applied in the field of carrier frequency offset estimation method and system

Active Publication Date: 2016-04-13
SPACE STAR TECH CO LTD
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Problems solved by technology

[0005] In view of this, the present invention provides a carrier frequency offset estimation method and system to solve the problem that in the prior art...

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  • Carrier wave frequency deviation estimation method and system
  • Carrier wave frequency deviation estimation method and system

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[0039] For reference and clarity, descriptions, abbreviations or abbreviations of technical terms used in the following text are summarized as follows:

[0040] OFDM: Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing technology;

[0041] MU-MIMO: Multi-UserMultiple-InputMultiple-Output, multi-user multiple input multiple output technology;

[0042] FFT: FastFourierTransformation, Fast Fourier Transformation;

[0043] QAM: QuadratureAmplitudeModulation, quadrature amplitude modulation;

[0044] FEC: ForwardErrorCorrection, forward error correction.

[0045] 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...

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Abstract

The embodiments of the invention provide a carrier wave frequency deviation estimation method and system. For the situation of emission of multiple unlinks from different emitters, due to existence of multipath carrier wave frequency deviations, one carrier wave frequency deviation is corresponding to one emitter, and under such a condition, it is quite difficult to estimate and correct the carrier wave frequency deviations at a receiving end easily. The reason is that composite time domain signals of the receiving end form a height nonlinear function about the carrier wave frequency deviations. Therefore, in order to reduce the complexity, by using the method and system provided by the embodiments of the invention, the carrier wave frequency deviations can be corrected before OFDM signals are sent for realizing the purpose that the only deviation needing to be corrected at the receiving end is a common residual carrier wave frequency deviation, such that the receiving end can perform unified common residual carrier wave frequency deviation compensation on the received N OFDM signals. Compared to the prior art, the phenomenon does not exist that channel estimation and carrier wave frequency deviation tracking are always affected by interference between carrier waves.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a carrier frequency offset estimation method and system. Background technique [0002] Carrier synchronization is one of the key technologies in communication systems, especially for communication networks with OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) system, carrier synchronization technology is whether the entire communication system can operate normally and whether each terminal can work normally. The key to interaction. [0003] There is only one carrier frequency offset in a single-user system, and the receiver can estimate it directly by analyzing the continuous phase shift of the received signal. For example, analyze the phase shift of the signal at the end of a symbol relative to the cyclic prefix in the time domain, or analyze the phase shift of the received signal at the pilot point between adjacent sy...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L27/00
CPCH04L27/0014H04L27/2657H04L2027/0018H04L2027/0026
Inventor 王育刚杨旭阳杨博刘江春赵诚储旭
Owner SPACE STAR TECH CO LTD
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