Low complexity data detection using fast fourier transform of channel correlation matrix

A correlation matrix and channel technology, applied in the transmission system, electrical components, etc., can solve complex power consumption, battery life reduction, high complexity and other problems

Inactive Publication Date: 2007-07-04
INTERDIGITAL TECH CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have high complexity
High complexity leads to UE14 1 incremental power consumption at the

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
  • Low complexity data detection using fast fourier transform of channel correlation matrix
  • Low complexity data detection using fast fourier transform of channel correlation matrix
  • Low complexity data detection using fast fourier transform of channel correlation matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Figure 2 depicts a simplified transmitter 26 and receiver 28 using low complexity data detection in a CDMA / TDD communication system. In a typical system, the transmitter 26 is located in each UE14 1 to 14 3 , and the multiplexing circuit 26 for transmitting multiplex traffic is located at each base station 12 1 to 12 5 middle. A low-complexity data detection receiver 28 may be located at the base station 12 1 , UEs14 1 to 14 3 or both. Receiver 28 may be used for UE 14 1 , multi-user or single-user detection of high data rate services such as 2 megabits per second (Mbs) for media. When only one UE14 1 The receiver 28 can also be used by the base station 12 when transmitting in time slots 1 .

[0014] The transmitter 26 can transmit data on the radio frequency channel 30 . A data generator 32 in the transmitter 26 may generate data that is transmitted to the receiver 28 . The spreading and modulating means 34 can spread the data and can time-multiplex the sp...

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

A combined signal is received over a shared spectrum in a time slot in a time division duplex communication system using code division multiple access. Each data signal experiences a similar channel response. The similar channel response is estimated. A matrix representing a channel of the data signals based on in part the estimated channel response is constructed. A spread data vector is determined based on in part a fast fourier transform (FFT) decomposition of a circulant version of the channel matrix. The spread data vector is despread to recover data from the received combined signal.

Description

[0001] This application is a divisional application of the No. 02804604.8 invention patent application of the above-mentioned name submitted on August 6, 2003. (1) Technical field [0002] The present invention relates to wireless communication systems, and more particularly, the present invention relates to data detection in wireless communication systems. (2) Background technology [0003] FIG. 1 depicts a wireless communication system 10 . The communication system 10 has and user equipment (Ues) 14 1 to 14 3 communication base station 12 1 to 12 5 . Each base station 121 has its operating area and user equipments (UEs) 14 1 to 14 3 Communication related operating area. [0004] Like code division multiple access (CDMA) and time division dual access using code division multiple access (TDD / CDMA), multiple communications are transmitted on the same frequency spectrum. These communications are differentiated by their channelization codes. In order to use spectrum mo...

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): H04B1/707H04B1/7105
Inventor 潘俊霖帕萨波拉丁·德艾利拉·莱尔
Owner INTERDIGITAL TECH CORP
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