A carrier frequency offset estimation method and system
A carrier frequency offset and pilot subcarrier technology, applied in the field of carrier frequency offset estimation methods and systems
Active Publication Date: 2019-10-25
SPACE STAR TECH CO LTD
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
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, the receiving end first needs to separate the user signals according to the channel information, and then compensate the respective carrier frequency offsets.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0040] For the sake of reference and clarity, the descriptions, abbreviations or abbreviations of technical terms used in the following are summarized as follows:
[0041] OFDM: OrthogonalFrequencyDivisionMultiplexing, orthogonal frequency division multiplexing technology;
[0042] MU-MIMO: Multi-UserMultiple-InputMultiple-Output, multi-user multiple input multiple output technology;
[0043] FFT: FastFourierTransformation, fast Fourier transform;
[0044] QAM: QuadratureAmplitudeModulation, quadrature amplitude modulation;
[0045] FEC: ForwardErrorCorrection, forward error correction.
[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More 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 method and system for estimating carrier frequency offset. Background technique [0002] Carrier synchronization is one of the key technologies in communication systems, especially for OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) communication networks. Carrier synchronization technology is whether the entire communication system can operate normally and whether each terminal can operate normally. The key to interaction. [0003] In a single-user system, there is only one carrier frequency offset, and the receiving end can estimate it directly by analyzing the continuous phase shift of the received signal. For example, analyzing the phase shift of the signal at the end of a symbol relative to the cyclic prefix in the time domain, or analyzing the phase shift of the received signal at the pilot point between adjacent symb...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
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