Frequency bias estimation equipment, method and communication device
A technology for frequency offset estimation and equipment, applied in multi-frequency code systems, shaping networks in transmitters/receivers, baseband system components, etc., can solve problems such as high computational complexity, performance degradation, and high complexity, and achieve The effect of high frequency offset estimation accuracy, improved robustness, and low complexity
Inactive Publication Date: 2014-11-12
MARVELL TECH SHANGHAI
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The principle of the Kay method is simple, but the performance drops significantly when the signal-to-noise ratio is low
The L&R method has high accuracy at low SNR, but the computational complexity is very large
FFT method to achieve higher precision, the complexity is very high
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
[0020] Features and exemplary embodiments of various aspects of the invention will be described in detail below. The following description covers numerous specific details in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a clearer understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configuration and algorithm presented below, but covers any modification, replacement and improvement of related elements, components and algorithms without departing from the spirit of the present invention.
[0021] In order to facilitate the understanding of the following content, here is a brief introduction to the principle of automatic frequency correction (AFC, also commonly re...
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 invention discloses frequency bias estimation equipment, a method and a communication device. The frequency bias estimation equipment includes a path selection module, a pre-processing module, a zero filling module, a spectrum analysis module and an interpolation module. The path selection module is used for executing channel estimation to the input signal in order to selection a plurality of paths. The pre-processing module is used for multiplying a combination signal with complex conjugate of the input signal, wherein the combination signal is obtained by rake combining the channel estimation of the selected path with input signal execution class. The zero filling module is used for filling zero on the tail of the pre-processing signal. The spectrum analysis module is used for performing spectrum analysis to the zero filled signal in order to search a plurality of peaks. The interpolation module is used for estimating frequency bias between the sending part and the receiving part by interpolation with the plurality of peaks.
Description
technical field [0001] The present invention relates to the field of wireless communication, and more specifically, to a frequency offset estimation device, method and communication device in wireless communication. Background technique [0002] In a wireless communication system, the information interaction between the sender and receiver is realized through the data transmission of the space channel. On the sending side, the transmitter modulates the user signal to be sent onto a radio frequency (RF) carrier of a certain channel to generate a radio frequency signal, and then transmits it to the wireless space through the antenna. On the receiving side, the receiver receives the RF signal from the radio space and uses a local oscillator signal to recover the desired user signal. During the signal receiving process, the frequency of the local oscillator signal of the receiver determines the received channel, and only when the frequency of the local oscillator signal matches...
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): H04L25/02H04L27/26H04L25/03
Inventor 姚天翔刘石陈晓春李茜
Owner MARVELL TECH SHANGHAI