Method and device for sending and receiving data in high-sensitivity narrow band wireless communication

A wireless communication, high-sensitivity technology, applied in the field of communication, can solve problems such as the inability to meet ultra-high sensitivity, and achieve the effect of reducing the amount of calculation, speeding up the synchronization time, and improving the sensitivity

Inactive Publication Date: 2015-06-10
北京芯同汇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0019] In view of this, the embodiment of the present invention provides a high-sensitivity narrowband wireless communication data transmission and reception method and device to solve the problem that the prior art cannot meet the requirements of ultra-high sensitivity

Method used

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  • Method and device for sending and receiving data in high-sensitivity narrow band wireless communication
  • Method and device for sending and receiving data in high-sensitivity narrow band wireless communication
  • Method and device for sending and receiving data in high-sensitivity narrow band wireless communication

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Embodiment 1

[0060] According to Embodiment 1 of the present invention, a method for sending high-sensitivity narrowband wireless communication data is provided.

[0061] figure 1 It is a flowchart of a method for sending high-sensitivity narrowband wireless communication data according to an embodiment of the present invention, such as figure 1 As shown, it mainly includes the following steps 102-step 104:

[0062] Step 102, the sending end uses two consecutive reverse chirp-like signals as the synchronization sequence in the preamble, and two identical complex sinusoidal signals as the reference symbols in the preamble, and together with the baseband data to be sent form a pending Send frame.

[0063] In the embodiment of the present invention, two continuous reverse chirp-like signals are used as the synchronization sequence of the preamble in the signal transmission process, and two identical sinusoidal pulses are used as the preamble reference symbols. Since the chirp-like signal T...

Embodiment 2

[0074] According to Embodiment 2 of the present invention, a high-sensitivity narrowband wireless communication data receiving method is provided.

[0075] figure 2 It is a flowchart of a method for receiving high-sensitivity narrowband wireless communication data according to an embodiment of the present invention, such as figure 2 As shown, it mainly includes the following steps:

[0076] Step 201, receiving a radio frequency transmission signal from the sending end;

[0077] Step 202, down-converting the radio frequency transmission signal to obtain a baseband reception signal;

[0078] Step 203, sampling the baseband received signal to obtain a baseband received digital signal;

[0079] Step 204, performing coarse time synchronization on the signal at the preamble in the baseband received digital signal, and then performing fine time synchronization, wherein the synchronization sequence in the preamble is composed of two continuous reverse chirp-like signals Composit...

Embodiment 3

[0098] Corresponding to the above data sending method, Embodiment 3 of the present invention provides a high-sensitivity narrowband wireless communication data sending device.

[0099] image 3 It is a schematic structural diagram of a high-sensitivity narrowband wireless communication data sending device according to an embodiment of the present invention, as shown in image 3 As shown, the high-sensitivity narrowband wireless communication data transmission device according to the embodiment of the present invention mainly includes: a component module 300, which is used to use two continuous reverse chirp-like signals as the synchronization sequence in the preamble, two identical The complex sinusoidal signal is used as the reference symbol in the preamble, together with the baseband data to be sent to form the frame to be sent; the quadrature modulation module 301 is used to modulate the frame to be sent onto two carriers in phase and quadrature to form to and send RF tran...

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Abstract

The invention discloses a method and a device for sending and receiving data in high-sensitivity narrow band wireless communication. The method comprises the steps of treating two continuously reversed linear frequency modulation signal as a synchronous sequence in a front synchronizing head, treating two same complex sine signals as reference symbols in the front synchronizing head, and then forming a frame to be sent tighter with baseband data to be sent through a sending end; modulating the frame to be sent to two in-phase orthographic carriers to form and send a radio frequency sending signal. With the adoption of the method, the angle features can be jointly demodulated without precise frequency offset estimation by the FFT algorithm and the phase; the various conditions and algorithm advantages are combined, so that the single bit calculation quantity is greatly reduced, and moreover, the receiving sensitivity can be improved, and the data transmission distance can be increased.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for transmitting and receiving high-sensitivity narrowband wireless communication data. Background technique [0002] The Internet of Things networking technology forms a network through wireless nodes for wireless communication. In the wide-area networking technology of the Internet of Things, the coverage capability of nodes directly affects the node density, thereby affecting the network cost. In the communication process, 70% of the power consumption is used for radio frequency transmission, and the power of radio frequency transmission directly affects the life of the node. In addition, in order to increase the network capacity, it is necessary to reduce the bandwidth of the signal. Therefore, ultra-long transmission distance, low average transmit power, and narrowband characteristics have become three key issues in the wide-area networki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/12H04L27/14H04L27/26
CPCH04L27/12H04L27/144H04L27/2627H04L27/265
Inventor 何林申化龙郑傲日孟祥辉申贻军
Owner 北京芯同汇科技有限公司
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