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

Flexible uplink multi-address transmission device based on filter group and its method

A filter bank and frequency division multiple access technology, applied in the field of frequency division multiple access uplink transmitter, can solve the problems of implementation complexity and cost control

Active Publication Date: 2012-05-30
SHANGHAI RES CENT FOR WIRELESS TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, its implementation complexity and cost are difficult to control

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
  • Flexible uplink multi-address transmission device based on filter group and its method
  • Flexible uplink multi-address transmission device based on filter group and its method
  • Flexible uplink multi-address transmission device based on filter group and its method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] See figure 1 , which is a functional block diagram of a specific embodiment of a filter bank-based FDMA uplink transmitting end and receiving end in the present invention. For the uplink, each mobile transmitter adopts the inverse filter bank transform (IFBT) modulation with a smaller number of subbands to generate multi-subband signals, and uses a lower sampling rate to form their own discrete narrowband multi-subband signals, and then , after D / A conversion, the analog baseband signal is formed, and finally the user-specific spectrum shift is completed through the time domain phase shift to form the transmitted signal. The filter bank transformation (FBT) with higher sampling frequency and larger number of subbands is used at the receiving end of the base station to demodulate synthesized wideband signals from all users with different bandwidths (number of subbands) and carrier frequency offsets. Since the number of subbands of the multi-subband signals transmitted b...

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 flexible filter bank-based FDMA (frequency division multiple access) uplink transmitting terminal, a receiving terminal, and a receiving method are provided; each user transmitting terminal with inverse filter bank transform with less band number and a lower rate modulates to form a discrete narrow band multi-sub-band signal, and then forms a RF signal after digital to analog conversion (d / a conversion), spectrum removal specified by user and up-conversion; while at a base station a higher rate and FBT with more sub-band number are adopted so as to demodulate a synthetic wide band signal with various band widths (sub-band number) and carrier frequency offset from all users, so as to make the system have strong robustness for multi-access interference, as well as adaptable to various service requirement and terminal processing ability of multi-user well, so as to reduce complexity and power consumption of the transmitting terminal.

Description

technical field [0001] The invention relates to a filter bank-based frequency division multiple access uplink sending end, receiving end, sending method, and receiving method. Background technique [0002] In recent years, wireless communication systems have developed rapidly towards broadband; along with this development trend, the bandwidth occupied by a single channel in wireless communication systems is getting higher and higher, the complexity of wireless receivers is also increasing continuously, and the implementation complexity is getting higher and higher. At the same time, according to research in recent years, in order to effectively improve the throughput of the system, the combined multiple access technology of frequency division multiple access technology (FDMA) and time division multiple access technology (TDMA) will become the main multiple access technology of future mobile communication technology . Based on such technical requirements, multi-carrier modul...

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): H04L27/26H04L27/38
Inventor 张小东李明齐芮赟
Owner SHANGHAI RES CENT FOR WIRELESS TECH