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

Multi-carrier MIMO (multiple input multiple output) system based on chip-level spread spectrum code of space-time-frequency three-dimensional complementary code

A spread spectrum coding and complementary code technology, which is applied in the directions of diversity/multi-antenna system, transmission system, space transmit diversity, etc., can solve the problem of poor anti-multipath interference performance of MIMO system, and achieve the effect of improving anti-multipath interference performance.

Inactive Publication Date: 2012-02-01
HARBIN INST OF TECH
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of poor anti-multipath interference performance of MIMO systems adopting existing coding methods, the present invention provides a multi-carrier MIMO system based on chip-level spread spectrum coding of space-time-frequency three-dimensional complementary codes

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
  • Multi-carrier MIMO (multiple input multiple output) system based on chip-level spread spectrum code of space-time-frequency three-dimensional complementary code
  • Multi-carrier MIMO (multiple input multiple output) system based on chip-level spread spectrum code of space-time-frequency three-dimensional complementary code
  • Multi-carrier MIMO (multiple input multiple output) system based on chip-level spread spectrum code of space-time-frequency three-dimensional complementary code

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0021] Specific implementation mode 1. Combination figure 1 Describe this specific embodiment, the multi-carrier MIMO system based on the chip-level spread spectrum coding of the space-time-frequency three-dimensional complementary code, for each user k in the K users, its signal transmission process is:

[0022] Step 1. Perform serial / parallel conversion on the data to obtain parallel N-way data;

[0023] Step 2, using the chip-level spread spectrum encoding of the space-time-frequency three-dimensional complementary code for the parallel N-way data described in step 1 Carry out frequency spreading to obtain N channels of data after frequency spreading;

[0024] Step 3, each path data in the N path spread data obtained in step 2 respectively at f 1 , f 2 ,..., f M Modulate with M sub-carriers at a frequency of 1 to obtain a modulation signal; N modulation signals are obtained in total from N data, and the N modulation signals are sent to the wireless channel through N tr...

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 signal transmission and reception method of a multi-carrier MIMO (multiple input multiple output) system based on a chip-level spread spectrum code of a space-time-frequency three-dimensional complementary code, relating to an MIMO system based on a chip-level spread spectrum code of a space-time-frequency three-dimensional complementary code. Through the invention, the problem of poor multi-path interference resistance of the MIMO system adopting the existing coding mode is solved; and the existing coding mode is only applicable to the condition that the channel response is in slow fading, namely that the channel response is kept unchanged for sure within the time of the symbol bits. A transmitting end of the multi-carrier MIMO system performs spectrum spread by using the chip-level spread spectrum code of the space-time-frequency three-dimensional complementary code; and a receiving end performs de-spreading operation by using the chip-level spread spectrum code of the space-time-frequency three-dimensional complementary code. The multi-path interference resistance of the MIMO system disclosed by the invention is greatly improved, and the MIMO system is suitable for wireless communication processes.

Description

technical field [0001] The invention relates to a chip-level spread-spectrum coded MIMO system based on a space-time-frequency three-dimensional complementary code. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM), known as the "fourth generation mobile communication technology", is a high-speed transmission technology proposed for high spectrum utilization efficiency. OFDM technology has many excellent characteristics, such as high spectrum utilization, scalable bandwidth, flexible spectrum resource allocation, anti-multipath fading and so on. However, OFDM technology still has many disadvantages, such as sensitivity to frequency offset and phase noise, high power peak-to-average ratio, etc., especially in order to achieve inter-symbol interference caused by multipath, OFDM introduces a cycle as an inter-symbol guard interval Prefix (Cyclic Prefix, CP). The introduction of CP does greatly reduce the attenuation of OFDM, but it takes up the m...

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): H04B1/711H04B7/08
Inventor 陈晓华韩帅孟维晓
Owner HARBIN INST OF TECH
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