Unlock instant, AI-driven research and patent intelligence for your innovation.

Signal processing method and device of receiver

A signal processing and receiver technology, applied in the field of communication, can solve problems such as poor performance, large differences between channels and actual channels, etc.

Inactive Publication Date: 2014-06-18
CHINA ACAD OF TELECOMM TECH
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] To sum up, the existing linear interpolation channel estimation schemes do not perform well in high-speed rail scenarios, because the main factor affecting the performance of high-speed rail channels is frequency offset, and the relationship between channels at different positions in the time domain caused by frequency offset is Non-linear, the channel estimated by linear interpolation is quite different from the actual channel
At the same time, most high-speed rail scenarios are single-path or Line of Sight (LoS) channels, and there will be a main path with strong energy, accounting for more than 90% of the total energy. Existing solutions do not effectively use this feature to enhance the channel Estimated accuracy

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Signal processing method and device of receiver
  • Signal processing method and device of receiver
  • Signal processing method and device of receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] Embodiments of the present invention provide a signal processing method and device for a receiver, which are used to improve the signal processing accuracy of the receiver.

[0056] The technical solution proposed by the embodiment of the present invention is a signal processing solution for a receiver in a high-speed railway scenario of an LTE / LTE-A system. The solution has low complexity and can effectively improve system performance in a high-speed rail scenario.

[0057] see figure 2 , a signal processing method for a receiver provided in an embodiment of the present invention, specifically comprising:

[0058] Step 1. Estimate the timing deviation of the received signal, and estimate the timing deviation Δn f , then the received signal can be expressed as:

[0059] R k = Σ m = 0 N - 1 ...

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

No PUM Login to View More

Abstract

The invention discloses a signal processing method and a signal processing device of a receiver, which are used for improving the signal processing precision of the receiver. The signal processing method of the receiver provided by the invention comprises the following steps of dividing frequency domain signals of pilot frequency positions by a local pilot frequency to obtain frequency domain channel estimated values of the pilot frequency positions; implementing fast inverse Fourier transform on the frequency domain channel estimated values to obtain time domain channel estimated values; finding the maximum diameter of the time domain channel estimated values, and obtaining the final frequency domain channel estimated values by utilizing the channel estimated data of the maximum diameter.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a signal processing method and device for a receiver. Background technique [0002] High-speed railways have developed rapidly in my country in recent years. After several speed increases, the speed of the current express trains can reach more than 300km / h, but mobile communication under high-speed movement is a problem that needs to be studied and solved. For Orthogonal Frequency Division Multiplex (OFDM) technology, the Doppler dispersion generated by high-speed movement will destroy the orthogonality between OFDM sub-carriers and generate inter-sub-carrier interference. Inter-carrier interference will seriously affect the accuracy of channel estimation and lead to a sharp decline in OFDM system performance. [0003] High-speed scene channels are different from ordinary channels, specifically reflected in: [0004] The number of multipaths between the base st...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L27/38
Inventor 刘龙张亚文李琼
Owner CHINA ACAD OF TELECOMM TECH