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Transmit/receiver and method based on multiple sub-band filter group

A technology of filter bank and transmitting device, which is applied in the shaping network of transmitter/receiver, baseband system components, modulated carrier system, etc., and can solve problems such as signal distortion, signal out-of-band interference, and spectrum leakage of transmitted signals

Inactive Publication Date: 2007-04-04
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

If the smear in the multi-subband filtered signal is directly intercepted, on the one hand, it will cause signal distortion, and on the other hand, it will cause spectrum leakage of the transmitted signal, resulting in out-of-band interference of the signal

Method used

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  • Transmit/receiver and method based on multiple sub-band filter group
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  • Transmit/receiver and method based on multiple sub-band filter group

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Embodiment Construction

[0041] Fig. 1 shows a block diagram of a transmitter of a frequency division multiple access system based on a multi-subband filter bank with a time-domain recurrent structure according to a specific embodiment of the present invention. It includes a data block segmentation device 10, a serial-to-parallel conversion device 11, a K-point FFT transform device 12, a subband mapping device 13, an M-point IFFT transform device 14, M up-sampling devices (for brevity) , only three 150, 151 and 152 are shown in Fig. 1), M polyphase filter devices (for simplicity, only three 160, 161 and 162 are shown in Fig. , a waveform synthesis device 18, a waveform buffer truncation device 19, a cyclic waveform forming device 20 and a cyclic prefix adding device 21. Wherein, the IFFT transformation device 14 of M points, M upsampling devices (for simplicity, only three 150, 151 and 152 are shown in Fig. 1), M polyphase filter devices (for simplicity, in Fig. 1 Only three 160, 161 and 162 are show...

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Abstract

The sending end buffers the waveform signals processed by subband filter banks; cutting off the streaking signals at the beginning and end of the buffer waveform to get the truncated signals; making the looping stack from beginning to end of the truncated signals to get the transmission signals of time domain looping from beginning to end.

Description

technical field [0001] The present invention relates to a transmitting and receiving device and a method thereof, in particular to a transmitting and receiving device based on a multi-subband filter bank with a time-domain cyclic structure. Background technique [0002] In recent years, wireless communication systems have developed rapidly towards broadband; along with this development trend, wireless communication systems occupy higher and higher bandwidths, higher transmission rates, and higher spectral efficiency requirements. In the broadband wireless mobile communication system and the broadband wireless access network, multiple users are required to access at the same time, so multiple access technology is required. There are three main types of multiple access technologies commonly used: frequency division multiple access, time division multiple access, and code division multiple access. Frequency division multiple access technology is to allocate user information to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04J4/00
CPCH04L27/2608H04L27/2605H04L5/0044
Inventor 张小东李明齐周斌卜智勇
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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