Communication methods and devices based on filter bank multi-carrier modulation

A multi-carrier modulation and filter bank technology, applied in multi-frequency code systems, preventing/detecting errors through diversity reception, using return channels for error prevention/detection, etc., to achieve maximum spectrum efficiency, good signal reception performance and Spectrum leakage characteristics, effects of suppressing smearing effect

Active Publication Date: 2016-08-10
BEIJING SAMSUNG TELECOM R&D CENT +1
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the tailing problem in the FBMC system during the transmission of data blocks, there is currently no very effective method to reduce the impact of the tailing effect on the system

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
  • Communication methods and devices based on filter bank multi-carrier modulation
  • Communication methods and devices based on filter bank multi-carrier modulation
  • Communication methods and devices based on filter bank multi-carrier modulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] In this embodiment, performing preprocessing on the predetermined symbols includes performing a precoding operation on the predetermined symbols, that is, performing a precoding operation on the multi-carrier signal in the frequency domain, so as to cancel interference caused by a subsequent truncation operation.

[0071] For ease of understanding, the interference caused by the truncation operation is firstly analyzed when the predetermined symbols are not preprocessed.

[0072] For example, consider a system using M = 256 subcarriers, the data block contains 28 OQAM symbols (Z = {0,1,2,...,27}), the overlap factor is K = 4, and the filter parameters use PHYDYAS filtering device. The time domain response of the filter can be expressed as:

[0073] g ( 0 ) = 0 , g ( l ) = 1 - 1.94392 ...

Embodiment 2

[0106] In this embodiment, preprocessing the predetermined symbol includes selecting a signal allocated to the predetermined symbol according to different situations of the data block to be transmitted.

[0107] In one implementation, preprocessing may include allocating the required reference signals in a data block to predetermined symbols that will be affected by the truncation operation.

[0108] Generally speaking, in addition to payload data, a data block must allocate specific resources for transmitting reference signals, so that the receiving end can complete channel estimation. Since the reference signal is a known signal, and the impact of the truncation operation is mainly concentrated on the resulting ICI, and the ICI is also known, the allocation of the reference signal to the symbols affected by the truncation still allows the receiver to complete channel estimation.

[0109] Figure 5 A schematic diagram of reference signal allocation of a data block is shown. ...

Embodiment 3

[0123] In Embodiment 1 and Embodiment 2, the truncation used is to directly set the signal in the truncation interval to zero, that is, to set part or all of the trailing data to zero. The advantage of this method is that it can effectively shorten the length of the data block. However, its negative effect is that the damage to the waveform causes the frequency domain focus of the signal to deteriorate, resulting in strong out-of-band leakage. In this embodiment, the truncation operation may include performing a windowing operation on part or all of the trailing data. In one implementation, some sample points in the truncated region are set to zero, and a windowing operation is performed on the remaining part sample points. Take the data block in Embodiment 1 as an example. For example, 448 samples are truncated on both sides of the data block, 200 samples can be selected to be zeroed, and a windowing operation is performed on the remaining 248 samples.

[0124] Figure 8 S...

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 signaling transmitting method and signal receiving method based on filter bank multi-carrier modulation and a corresponding transmitter and receiver. The signaling transmitting method based on filter bank multi-carrier modulation comprises following steps of preprocessing predetermined symbols in data blocks comprising one or more symbols; carrying out filter bank multi-carrier modulation on the preprocessed data blocks; truncating partial or all trailing data of the modulated data blocks; and sending the truncated and modulated data blocks, wherein the predetermined symbols are the symbols influenced by the truncation. Through adoption of the embodiment of the methods and the devices, the trailing effect resulting from the truncation can be effectively suppressed by preprocessing the symbols influenced by the truncation before the truncation, the good signal receiving performance and spectrum leakage property can be ensured, and the spectrum efficiency of the filter bank multi-carrier (FBMC) system can be maximized.

Description

technical field [0001] The present application generally relates to the technical field of wireless communication, and in particular relates to a signal transmission method based on filter bank multi-carrier modulation, a signal reception method, and a corresponding transmitter and receiver. Background technique [0002] With the rapid development of the information industry, especially the growing demand from the mobile Internet and the Internet of Things (IoT, internet of things), unprecedented challenges are brought to future mobile communication technologies. For example, according to the report ITU-R M.[IMT.BEYOND2020.TRAFFIC] of the International Telecommunication Union ITU, it can be predicted that by 2020, the growth of mobile traffic will increase by nearly 1,000 times compared to 2010 (4G era), and the number of user equipment connections will also increase. More than 17 billion. As a large number of IoT devices gradually penetrate into the mobile communication ne...

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): H04L27/26H04L1/06H04L1/18
Inventor 孙鹏飞喻斌朱大琳
Owner BEIJING SAMSUNG TELECOM R&D CENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap