公开(公告)号：WO2006125343A1

公开(公告)日：2006-11-30

申请号：PCT/CN2005/000726

申请日：2005-05-25

Applicant: 中国科学院上海微系统与信息技术研究所 ,  上海无线通信研究中心 ,  张小东 ,  卜智勇 ,  周斌 ,  李明齐 ,  杨秀梅 ,  周平

Inventor： 张小东 ,  卜智勇 ,  周斌 ,  李明齐 ,  杨秀梅 ,  周平

IPC: H04J11/00

CPC classification number: H04L27/2647 ,  H04L25/03159 ,  H04L27/2626

Abstract: Techniques are provided to support orthogonal multiple carriers frequency-time division multiplex based on orthogonal frequency division multiplex and single carrier with frequency domain equalization in prior art. At a transmitter end, Serial to Parallel Transform and Inverse Fast Fourier Transform are performed for the input serial data stream, then data blocks after IFFT are multiplexed to be a OFTDM symbol data part in temporal sequence; and then a circulation prefix is added in its front-part to form a final OFTDM symbol. At a receiver end, the CP in the front-part of the OFTDM symbol down-converted to a baseband is removed, and after the operations of data de-multiplex, FFT and P/S corresponding to the transmitter end are performed, the original serial data stream is recovered. Except for including the advantage of said prior art, this disclosure can overcome their disadvantage, and a preferable tradeoff between the general performance and complexity of the system can be acquired.

公开(公告)号：WO2007036134A1

公开(公告)日：2007-04-05

申请号：PCT/CN2006/002347

申请日：2006-09-11

Applicant: 中国科学院上海微系统与信息技术研究所 ,  上海无线通信研究中心 ,  张小东 ,  李明齐 ,  周斌 ,  卜智勇

Inventor： 张小东 ,  李明齐 ,  周斌 ,  卜智勇

IPC: H04B3/21

CPC classification number: H04L27/2605 ,  H04L27/2608

Abstract: A transmitting device, receiving device and method based on multiple sub-bands filters set, the transmitter cuts the tailing signals at the head and end segments of buffered wave-forms by buffering the wave-form signals composed by multiple sub-bands filters set, and obtains the shorter signals, then the shorter signals are superimposed circulated at the head and end segments and time domain transmission signals circulated at the head and end segments are obtained. By cutting the tailing signals at the head and end segments of buffered wave-forms, the system transmission efficiency is improved, and by superimposing the shorter signals circulated at the head and end segments to form time domain transmission signals circulated at the head and end segments, the interfere out of band of the transmitted signals is decreased and the orthogonality of multiple sub-bands signals is ensured. The receiver extends the input data block circulated at the head and end segments correspondingly, so the orthogonality of the transmitted signals can be recovered, and the signal distortion is decreased.