Transmitter based on multiple M dimension parallel modulaticn communication mode

A communication method and transmitter technology, applied in the field of transmitters, can solve the problems that quasi-orthogonal codewords have not been seen in CDMA communication systems, etc.

Inactive Publication Date: 2005-05-25
UNIV OF SCI & TECH OF CHINA
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quasi-orthogonal codewords constructed by this method have not been seen in CDMA communication systems using M-ary modulation.

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
  • Transmitter based on multiple M dimension parallel modulaticn communication mode
  • Transmitter based on multiple M dimension parallel modulaticn communication mode
  • Transmitter based on multiple M dimension parallel modulaticn communication mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In this embodiment, combined with the designed frame structure of the uplink, the uplink dedicated channel is divided into a dedicated physical data channel (Dedicated Physical Data Channel, DPDCH for short) carrying a data flow and a dedicated physical control channel (Dedicated Physical Data Channel) carrying a control information flow. Control Channel), because DPDCH requires high-speed transmission, and the transmission rate of DPCCH is relatively low, so, in the specific implementation, the transmitter structure of the MM-aryM method is as follows figure 1shown. In the figure, the data flow 1 first passes through the splitter 3 and is divided into several paths. For each path of data, a part passes through the common modulator Mi (i=1,...n), and the number of bits thereof is the same as the modulation method adopted by Mi Correlation, as corresponding to quaternary phase shift keying, the number of bits passing through modulator Mi is 2 bits; The number of codewor...

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

Said invention is based on a transmitter of M-ary parallel communication mode, which is characterized by combining M-ary modulation mode with traditional binary phase shift keying, quaternary phase shift keying and quadrature amplitude modulation, dividing data stream into multiplex parallel modulation, in each path, part of data is modulated by M-ary mode and part of data is modulated by traditional modulation mode, using quasi-orthogonal code character to construct as more as possible quasi-orthogonal code character, making optimal grouping, to raise demodulation property.

Description

Technical field: [0001] The invention belongs to the technical field of modulation in mobile communication, and particularly relates to a transmitter combining a parallel M-dimensional (M-ary) modulation mode with a block orthogonal code set as a spreading code set and traditional modulation technology. Background technique: [0002] With the development of mobile communication technology, the number of users of the mobile communication system is constantly increasing, and the service rate required by the users is also constantly increasing. The emergence of the third-generation mobile communication system has greatly improved the data transmission rate, making high-speed data transmission possible. However, with the continuous increase of user demands, the rate still becomes the bottleneck of high-speed data services. [0003] The book "Wireless Communication: Principles & Practice" (Wireless Communication: Principles & Practice) published by Electronics Industry Press in ...

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
IPC IPC(8): H04B1/02H04J13/02
Inventor 朱近康李凡朱有团张磊
Owner UNIV OF SCI & TECH OF CHINA
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