Signal transmission method for single-carrier modulation with time-frequency domain combination

A single-carrier modulation and signal transmission technology, applied in the field of digital information transmission, can solve problems such as difficult synchronization, channel estimation and equalization, and high algorithm complexity, and achieve the effects of convenient synchronization, accurate estimation of channel response, and excellent performance

Inactive Publication Date: 2014-08-06
TSINGHUA UNIV
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Problems solved by technology

Due to the unknown nature of CP, it is difficult for the SC-FDE method to use CP to perform operations such as synchronization, channel estimation, and equalization. Even if these functions can be realized, the algorithm complexity is relatively high

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  • Signal transmission method for single-carrier modulation with time-frequency domain combination
  • Signal transmission method for single-carrier modulation with time-frequency domain combination
  • Signal transmission method for single-carrier modulation with time-frequency domain combination

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Embodiment Construction

[0041] A signal transmission method using time-frequency domain combined single-carrier modulation proposed by the present invention is described in detail in conjunction with the accompanying drawings and embodiments as follows:

[0042] A kind of signal transmission method that adopts the single carrier modulation of time-frequency domain combination that the present invention proposes, it is characterized in that, this method comprises the following steps:

[0043] 1) Perform channel coding and constellation mapping on the information generated by the transmitting end in sequence to obtain multiple symbols after mapping;

[0044] 2) Composing a plurality of symbols after the above mapping into a data block;

[0045] 3) TFU-SCM modulation is performed on each data block: set UW as a reference sequence; insert a pilot composed of one or more UWs at the front end of the data block, and insert a UW at the back end as a guard interval, and the data The block and the back-end UW...

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Abstract

The invention relates to a signal transmission method for single-carrier modulation with time-frequency domain combination and belongs to the technical field of digital information transmission. The method comprises the steps that channel coding and constellation labeling are sequentially conducted on information generated by a sending end and mapped symbols are obtained; the mapped symbols are combined into a data block, a pilot carrier composed of a plurality of UWs is inserted into the front end of the data block, and a UW is inserted into the rear end of the data block, so that a time-frequency domain combined single-carrier modulation symbol block is formed; operations such as symbol synchronization, frequency synchronization and frequency-domain balance are accomplished by a receiving end through the pilot carrier at the front end of the data block and the UW at the rear end of the data block in the received time-frequency domain combined single-carrier modulation symbol block, and constellation inverse labeling, channel decoding and original information recovery are sequentially conducted. The method keeps the advantage of low complexity of the SC-FDE technology, estimation of a channel response by the receiving end is more accurate, the system processing efficiency is higher, and the method is more suitable for a broadband wireless mobile communication system.

Description

technical field [0001] The invention belongs to the technical field of digital information transmission, and in particular relates to a single-carrier modulation technology in a broadband wireless mobile communication system. Background technique [0002] In a broadband wireless mobile communication system, the transmitted signal is often affected by occlusion, absorption, reflection, refraction and diffraction caused by various objects in the environment during the propagation process, forming multiple path signal components to reach the receiver. The signal components of different paths have different propagation delays, phases and amplitudes, and channel noise is added, and their superposition will make the composite signal cancel or enhance each other, resulting in severe fading. This fading will distort the received signal of the receiver and reduce the reliability of communication. In addition, if the transmitter or the receiver is in a relatively moving state, the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/01H04L1/00H04L27/26
Inventor 曾捷粟欣刘莉莉容丽萍李泽娇
Owner TSINGHUA UNIV
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