Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Offset modulation multi-carrier frequency division multiple access transmission method with adjustable bandwidth

A technology of offset modulation and transmission method, which is applied in the field of generating and receiving signal processing, and can solve problems such as flexible allocation of unfavorable wireless resources

Active Publication Date: 2015-08-26
HUAWEI TECH CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A major disadvantage of this multiple access transmission technology is that different users use the same bandwidth, which is not conducive to flexible allocation of wireless resources according to user needs

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
  • Offset modulation multi-carrier frequency division multiple access transmission method with adjustable bandwidth
  • Offset modulation multi-carrier frequency division multiple access transmission method with adjustable bandwidth
  • Offset modulation multi-carrier frequency division multiple access transmission method with adjustable bandwidth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] The offset modulation multi-carrier frequency division multiple access transmission method with adjustable bandwidth of the present invention can be applied to communication from multiple wireless terminals such as mobile phones to base stations. Different users occupy different frequency bands to obtain frequency division multiple access. Assume that the communication system using this transmission method has K users in total, and the total number of subcarriers is N c. Due to the frequency selective fading of the wireless channel, the orthogonality between different user signals at the receiving end is destroyed. And frequency selective fading will also cause inter-symbol interference of a single user, so it is necessary to adopt a multi-user joint equalization method to remove multi-user interference and inter-symbol interference. To resist...

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 an adjustable bandwidth offset modulation multi-carrier frequency division multiple access transmission method which comprises the steps of generating a sending signal on a sending end and a processing a receiving signal on a receiving end, wherein the whole frequency band is divided into a plurality of sub bands to be allocated to different uses for realizing frequency division multiple access, each sub band (user) adopts offset modulation, bandwidth of each sub band (user) can be independently determined, frequency spectrum overlapping is allowed among the sub bands (users), the receiving end adopts a low-complexity frequency domain balance-based iteration decoding receiver, and can realize sending diversity under the condition of dual sending antennae. According to the method provided by the invention, the peak-to-average ratio of the sending signal is greatly lowered under the condition of keeping the frequency spectrum efficiency, the dynamic and flexible frequency spectrum resource allocation is realized; and meanwhile, by adopting a multi-user united frequency domain balance-based iteration receiving signal processing method, the transmission reliability is ensured at lower complexity.

Description

technical field [0001] The invention belongs to the field of communication, and relates to a method for generating a sending signal of a communication system and processing a receiving signal. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) and Single Carrier Frequency Division Multiple Access (SC-FDMA) are currently two common multi-carrier frequency division multiple access transmission technologies. OFDM has the advantages of simple implementation, robustness against frequency selective fading, and easy support for multi-antenna technology, but it also has the disadvantage of large fluctuations in the envelope of the transmitted signal, which limits its power efficiency, especially in the uplink of wireless communication systems. in the application. [0003] In the SC-FDMA system, the DFT matrix is ​​used to precode the transmitted data vector of each user before it is mapped to the subcarriers of the OFDM system. The resulting transmitte...

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 Patents(China)
IPC IPC(8): H04L27/26H04B7/04
Inventor 高西奇王闻今郑福春仲文江彬巴特尔
Owner HUAWEI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com