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A simple transmission and receiving device and method based on multi-sub band filter groups

A filter bank and multi-subband technology, applied in the direction of space transmit diversity, multi-frequency code system, diversity/multi-antenna system, etc., can solve the problems of no unified implementation method, etc., and achieve the reduction of requirements and the reduction of DC components Effect

Active Publication Date: 2008-04-23
SHANGHAI RES CENT FOR WIRELESS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there is no uniform and simple implementation method for the multi-subband filter bank transmit and receive scheme based on non-critical sampling, especially under the condition of spectrum shift.

Method used

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  • A simple transmission and receiving device and method based on multi-sub band filter groups
  • A simple transmission and receiving device and method based on multi-sub band filter groups
  • A simple transmission and receiving device and method based on multi-sub band filter groups

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Embodiment Construction

[0054] figure 1 A block diagram of an implementation of a transmitting device based on a multi-subband filter bank according to a specific embodiment of the present invention is shown. It includes a serial / parallel conversion device 11, a subband mapping device 12, an M-point inverse discrete Fourier transform (IDFT) device 13, a phase shifting device 14, a data block cascading device 15, a waveform shaping means 16, a parallel / serial conversion means 17 and a waveform synthesis means 18.

[0055] It should be noted that the channel coding device, digital modulation device, baseband signal framing device, RF frequency conversion device and transmitting antenna, which are necessary components of the digital communication system transmitter, are not directly related to the purpose of the present invention and are not described here .

[0056] assume {a k , k=0, 1, 2....} is the serial modulated symbol sequence input to the serial-to-parallel conversion device 11;

[0057] A ...

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Abstract

The method includes steps: using sub band mapping to map modulation symbols to pointed sub band for transmission; next, through IDFT transform to form signal of multiple sub bands (MSB) in time domain (TD); then, through phase shifting and periodic expand to form signal of MSB with shifted frequency and expanded cycle in TD; carrying out waveform shaping and frequency spectrum shaping signal of MSB in TD; finally; using shifted overlap carries out waveform multiplexing in TD for shaped waveform symbol so as to form transmission symbol. The receiver of the filter set in MSB divides up the received data sequence into multiple data blocks, and each data block is equal to length of prototype filter; and then, carries out operations including waveform matching, phase shafting, DFT etc for the data block so as to obtain data symbol transmitted on pointed sub band. The invention can implement transmitting and receiving signal of multicarrier transmission system based on filter set in MSB.

Description

technical field [0001] The invention belongs to the technical field of broadband mobile communication, and in particular relates to a simple transmitting and receiving device and method based on multi-subband filter banks. Background technique [0002] In recent years, wireless communication systems are developing rapidly towards broadband. Along with this development trend, the bandwidth occupied by a single channel of the wireless communication system is getting higher and higher, the complexity of the wireless receiver is also continuously increasing, 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 . Bas...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B7/04
Inventor 李明齐张小东李元杰芮赟
Owner SHANGHAI RES CENT FOR WIRELESS TECH
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