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

MC-DS-CDMA uplink receiving method and device for array antenna

A technology of MC-DS-CDMA and array antenna, applied in diversity/multi-antenna system, multiplexing communication, code division multiplexing system, etc., can solve complex signal processing problems, achieve complexity reduction, Suppresses multiple access interference and minimizes system performance degradation

Inactive Publication Date: 2008-01-16
BEIJING JIAOTONG UNIV
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the basic structure and uplink receiving method of the existing array antenna MC-DS-CDMA system proposed under the basic concept of MC-DS-CDMA are very different from the method proposed by the present invention, and the signal processing is complicated

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
  • MC-DS-CDMA uplink receiving method and device for array antenna
  • MC-DS-CDMA uplink receiving method and device for array antenna
  • MC-DS-CDMA uplink receiving method and device for array antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The method of the present invention is discussed below:

[0027] 1. Separation of subcarrier signals

[0028] Investigate the uplink of the array antenna MC-DS-CDMA system, the base station uses an array antenna, and the mobile station uses a single antenna. The uplink transmission scheme of the mobile station adopts a typical single-antenna MC-DS-CDMA transmission scheme [Hara S and Prasad R.An Overview of Multi-carrier CDMA.IEEE Comm.Mag.1997; 35(12), pp.126-33. Hara S and Prasad R. Multi-carrier CDMA review. IEEE Communications Journal, 1997; 35(12), pp.126-33] and Binary Phase Shift Keying (Binary Phase Shift Keying, BPSK) modulation.

[0029] Suppose there are K mobile users in a cell in the system. For the MC-DS-CDMA transmission scheme, each subcarrier carries independent user information, so the signal transmitted by the lth subcarrier of the kth (1≤k≤K) user can be expressed as:

[0030] s k ...

Embodiment 2

[0114] The method of the invention is applicable to any array antenna mobile communication system adopting MC-DS-CDMA transmission scheme.

[0115] With reference to any user k arbitrary subcarrier l array antenna MC-DS-CDMA system uplink spatial domain combined receiving structure block diagram of Fig. 1, the specific steps of a kind of array antenna MC-DS-CDMA system uplink receiving method comprise:

[0116] Step 1, the signal r received by the first array element of the array antenna 1 (t),..., the signal r received by the Nth array element N (t) Send them to the carrier signal separation modules (1-1),..., (1-N) corresponding to the 1st, ..., N array elements respectively, and the N carrier separation modules complete the input signal and the modulation mode of the transmitting end The corresponding subcarrier cos(ω l t) The operation of multiplication realizes the separation of subcarrier signals, corresponding to the first, ..., the signals of the lth subcarrier of th...

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 relates to an uplink receiving method of array antenna MC-DS-CDMA system. The method is carried out with the steps that: first, the signals received by each array unit of the array antenna are respectively transmitted to carrier signal separation modules and are multiplied with a corresponded sub-carrier, which realizes the sub-carrier signal separation and obtains an output signal; second, de-spread and matched filter process to each separated array unit sub-carrier signal are carried out to realize user signal de-spreading and get the user sub-carrier signal matched filter output; third, the matched filter output signals on different array units are combined in the air domain to get user sub-carrier signal final judge variable and get the air domain diversity gain; fourth, user sub-carrier signal final judge variable after air domain combination is judged to get the user sub-carrier signal judge result. The method obviously enhances MC-DS-CDMA system performance.

Description

technical field [0001] The invention relates to an array antenna MC-DS-CDMA uplink receiving method and device, and belongs to the technical field of array antennas for MC-DS-CDMA cellular mobile communication systems. Background technique [0002] In the third generation (3G) mobile communication system, CDMA is the most important technology, and multi-carrier modulation will be the key technology of the future broadband wireless transmission system. Combining multi-carrier technology with CDMA technology to form a multi-carrier CDMA system is one of the important directions for future mobile communication development. The combination of multi-carrier technology and CDMA technology mainly includes three typical forms: multi-carrier CDMA (MC-CDMA), multi-carrier direct-sequence spread spectrum CDMA (MC-DS-CDMA) and multi-tone modulation CDMA (MT-CDMA). [Hara S and Prasad R.An Overview of Multi-carrier CDMA.IEEEComm.Mag.1997;35(12),pp.126-33.;Hara S and Prasad R.An Overview ...

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): H04B7/08H04J13/04H04L27/26
Inventor 杨维陈俊仕
Owner BEIJING JIAOTONG UNIV
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