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

Uplink receiving method for array antenna MT-CDMA system

A MT-CDMA and array antenna technology, applied in diversity/multi-antenna systems, transmission systems, multi-frequency code systems, etc., can solve the problems of not using redundant information in the air space, system reception performance limitations, etc.

Inactive Publication Date: 2009-07-08
BEIJING JIAOTONG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the uplink of the MT-CDMA system still uses a single antenna for reception, without using redundant information in the airspace, which greatly limits the reception performance of 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
  • Uplink receiving method for array antenna MT-CDMA system
  • Uplink receiving method for array antenna MT-CDMA system
  • Uplink receiving method for array antenna MT-CDMA system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0176] The method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0177] The method of the invention is applicable to any array antenna mobile communication system adopting MT-CDMA transmission scheme.

[0178] refer to figure 1 Any user (k) any sub-carrier (1 ') array antenna MT-CDMA system uplink space-time combined receiving structure block diagram, a kind of array antenna MT-CDMA system uplink receiving method's specific steps comprises:

[0179] Step 1, the signal r received by the first array element of the array antenna 1 (t), the signal r received by the second array element 2 (t),..., the signal r received by the Nth array element N (t) respectively sent to the carrier signal separation module (1-1), (1-2), ..., (1-N), N carrier separation modules complete the subcarrier cos( ω l′ t), sin(ω l′ t) Combining multiplication operations to realize the separation of each sub-carrier signal to obtain an output...

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

This invention relates to an up-link receiving method for an array antenna MT-CDMA system, which first of all separates sub-carrier signals from the received signals by every array element of the antenna, then de-spreads the signals and filters them to realize the de-spread of the user signal and separation of its sub-carrier multi-path signals to get the matched filter output of the multi-path signals, then, carries out 9 lines of vacuum domain merge to signals belonging to a same multi-path of a same sub-carrier of a same user, after that caries out time domain merge to multi-path signals of a same sub-carrier of a same user, finally judges the final judged variable to the merged user sub-carrier signal to get the judge result of the signal.

Description

technical field [0001] The invention belongs to the technical field of MT-CDMA cellular mobile communication system array antennas. Background technique [0002] The combination of multi-carrier technology and CDMA technology mainly includes three main forms: multi-carrier CDMA (MC-CDMA), multi-carrier direct-sequence spread spectrum CDMA (multicarrier DS-CDMA) and multi-tone modulation CDMA (MT-CDMA). Usually, the number of subcarriers in MC-CDMA and multicarrier DS-CDMA schemes is the same as the length of the spreading sequence, while the MT-CDMA scheme uses a longer spreading sequence and the number of subcarriers is much less than the length of the spreading sequence, so that Compared with the other two schemes, the MT-CDMA scheme has the advantages of suppressing multiple access interference, good performance, and low complexity of transmitting and receiving, and is one of the most competitive schemes for future mobile communication systems. [0003] At present, the u...

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): H04J13/02H04L27/10H04L27/26H04L1/06H04B1/707H04B7/08
Inventor 杨维陈俊仕刘俊英程时昕
Owner BEIJING JIAOTONG UNIV