Spread spectrum signal transmission, spread spectrum signal reception method, device, equipment and medium

A signal receiving device and spread spectrum signal technology, which is applied in the field of Internet of Things communication, can solve problems such as high cost and increased cost of spread spectrum system, and achieve the effects of improving stability, reducing implementation cost and complexity, and solving high complexity

Active Publication Date: 2021-08-10
BEIJING SENSORO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned methods all require the support of high-cost hardware equipment, which greatly increases the cost of the spread spectrum system.

Method used

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  • Spread spectrum signal transmission, spread spectrum signal reception method, device, equipment and medium
  • Spread spectrum signal transmission, spread spectrum signal reception method, device, equipment and medium
  • Spread spectrum signal transmission, spread spectrum signal reception method, device, equipment and medium

Examples

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Effect test

Embodiment 1

[0043] figure 2 It is a schematic diagram of a flow chart of a spread spectrum signal transmission method in Embodiment 1 of the present invention. This embodiment is applicable to the case of transmitting signals based on Hadamard matrix spread spectrum technology. The signal sending device can be implemented, and the device can be implemented in the form of software and / or hardware, and can generally be integrated into computer equipment. Such as figure 2 As shown, the method of this embodiment specifically includes:

[0044] S110. During signal transmission, acquire a preset residual frequency offset tolerance threshold, and determine spread spectrum modulation optimization parameters.

[0045] The process of signal transmission may refer to the process of transmitting signals using multi-ary system orthogonal spread spectrum technology. Specifically, in the application scenario of the long-distance low-power narrowband communication Internet of Things, the signal transm...

Embodiment 2

[0077] Figure 5 It is a flowchart of a method for receiving a spread spectrum signal in Embodiment 2 of the present invention. This embodiment is applicable to the situation of transmitting signals based on the Hadamard matrix spread spectrum technology. The method can be received by the spread spectrum signal provided by the embodiment of the present invention. device, which can be implemented in the form of software and / or hardware, and generally can be integrated into computer equipment. The method of this embodiment specifically includes:

[0078] S210. During the signal transmission process, acquire a despreading result of the signal, and the despreading result is determined by despreading the spread spectrum signal by using Hadamard matrix spread spectrum technology.

[0079] For content not described in detail in this implementation manner, reference may be made to the description in any of the foregoing implementation manners.

[0080] The spread spectrum signal is ...

Embodiment 3

[0098] Figure 6 It is a schematic diagram of an application scenario in Embodiment 3 of the present invention. Specifically, the method for transmitting a spread spectrum signal described in any one of the embodiments of the present invention is applied to a signal transmitting device, and the method for receiving a spread spectrum signal described in any one of the embodiments of the present invention is applied to a signal receiving device.

[0099] Among them, the structural diagram of the signal sending device is as follows: Figure 7 As shown, the signal transmitting device includes a serial-to-parallel converter 710 , a multiplexer 720 , a shaping filter 730 , an up-converter 740 , an antenna 750 and a Hadamard matrix 760 .

[0100] The serial-to-parallel converter 710 is used to perform parallel conversion on the information flow to be sent, specifically to convert a 1:n-d conversion relationship into n-d bits for parallel transmission in the same unit time, and the n...

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PUM

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Abstract

The embodiment of the invention discloses a method, device, equipment and medium for transmitting and receiving spread spectrum signals. The method includes: obtaining a preset residual frequency offset tolerance threshold during signal transmission, and determining optimal parameters of spread spectrum modulation; obtaining at least one information unit, the number of which is matched with the optimized parameters of spread spectrum modulation ;Using the Hadamard matrix to spread the spectrum of each of the information units to form a spread spectrum signal and modulate it to the signal receiving device, wherein the spread spectrum modulation optimization parameters are provided to the signal receiving device in advance to indicate the signal The receiving device corrects the signal despreading result. The embodiments of the present invention can increase the tolerable frequency offset of the system, reduce the complexity of system frequency offset estimation and frequency offset tracking, and reduce the cost and complexity of system implementation.

Description

technical field [0001] Embodiments of the present invention relate to the communication field of the Internet of Things, and in particular, to a method, device, device, and medium for transmitting and receiving spread spectrum signals. Background technique [0002] Spread spectrum communication has been increasingly widely used due to its strong anti-interference ability and good confidentiality performance. [0003] In the M-ary orthogonal spread spectrum system, the spread spectrum sequence set consists of M orthogonal codewords of length n. In the modulation process at the sending end, every n bits (bit) constitute a modulation symbol (n=log 2 (M)), select an orthogonal codeword with a corresponding sequence number for transmission according to the value of the modulation symbol. At the receiving end, M correlators are required to complete the orthogonal despreading operation, determine the sequence number of the transmitted spreading sequence, and obtain the modulation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/707H04B1/7087H04J13/20
CPCH04B1/707H04B1/7087H04J13/20
Inventor 郑波浪李晓明熊艳伟李建龙刘伟
Owner BEIJING SENSORO
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