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Single-frame communication method and device based on long spreading code, and storage medium

A communication method and technology of a communication device are applied in the field of communication to achieve the effects of increasing concurrent capacity, improving anti-collision capability, and improving signal-to-noise ratio.

Inactive Publication Date: 2020-07-17
上海奥感电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention discloses a single-frame communication method, device and storage medium based on long spreading codes. (In the case of non-streaming format), there are two systems using spread spectrum and non-spread spectrum

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  • Single-frame communication method and device based on long spreading code, and storage medium
  • Single-frame communication method and device based on long spreading code, and storage medium
  • Single-frame communication method and device based on long spreading code, and storage medium

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Embodiment 1

[0032] refer to figure 1 This embodiment discloses a single-frame communication method based on a long spreading code, wherein the method includes the following steps:

[0033] S1 samples the original symbol data at the spread rate;

[0034] S2 generates a random sequence at the spreading rate through a long random code generator;

[0035] S3 finally correlates the original data at the spreading rate with the data generated by the long random code generator to obtain the final spread data.

[0036] In S1, the multiple of the spreading symbol rate compared to the original symbol rate becomes the spreading ratio, and the spreading calculated by the power of 2 becomes the spreading factor.

[0037] In S2, the random sequence is generated as a commonly used M sequence, and the turnaround time of the sequence is greater than the length after single symbol spreading, which is 15 or more.

[0038] In S3, an XOR operation is performed on the return-to-zero code [0 / 1] sequence, and...

Embodiment 2

[0046] This embodiment discloses a single-frame communication device based on a long spreading code, including a receiving unit for receiving a single frame;

[0047] The judging unit, in the monitoring state, uses the receiving antenna gain of the communication object included in the single frame and the receiving power of the single frame to judge whether to send;

[0048] The sending unit actively initiates a single frame or in the monitoring state, and sends the single frame when the state of the judging unit is judged to allow sending.

[0049] It includes a memory, a processor, and a computer program stored on the memory and operable on the processor. When the computer program is executed by the processor, the long-spreading code-based Single frame communication method.

[0050] A signal processing unit is included for adjusting the transmission timing and / or frequency among a plurality of frames of modulation symbol sequences sent to each terminal specified by time and...

Embodiment 3

[0052]This embodiment discloses a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the single-frame communication method based on the long spreading code described in the first aspect is implemented.

[0053] The present invention spreads the original signal by means of a long spreading code, so as to avoid signal aliasing and collision that may exist in the same sequence, improve the signal-to-noise ratio (SNR), and improve the parallel access capability of the system. On the basis of the existing small wireless single frame of the Internet of Things, by using a long random sequence generator, the randomness of the sequence after the spread spectrum is enhanced, and the influence of the signal aliasing that may exist on the air interface of the same symbol is reduced. Thereby, the signal-to-noise ratio (SNR) after despreading is improved, the anti-collision capability of the receiver is improved, and the overall concu...

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Abstract

The invention relates to the technical field of communication, in particular to a single-frame communication method and device based on a long spreading code and a storage medium. The method comprisesthe following steps: sampling original symbol data at a rate after spectrum spreading; generating a random sequence on the spread spectrum rate through a long random code generator; and finally, performing related operation on the original data on the spread spectrum rate and the data generated by the long random code generator to obtain final spread spectrum data. On the basis of an existing small wireless single frame of the Internet of Things, the randomness of a sequence after spectrum spreading is enhanced by using the long random sequence generator, and the influence on the same symboldue to signal aliasing possibly existing in an air interface is reduced. Therefore, the signal-to-noise ratio (SNR) after dispreading is improved, the conflict resistance of the receiver is improved,and finally the overall concurrent capacity of the system is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a single-frame communication method, device and storage medium based on long spread spectrum codes. Background technique [0002] In the existing IoT small wireless (non-cellular) systems, including LoRa, Sigfox, Zigbee, Bluetooth and BLE systems, some systems (such as LoRa, Zigbee) improve the signal-to-noise ratio (SNR) by means of spread spectrum, and further Improve the fault tolerance of the system. [0003] LoRa's spread spectrum method, that is, the original symbol is sent with a specific sequence after encoding. For example, symbol 3 is always sent with a sequence of 1-1-11. [0004] symbol code c0 c1 c2 c3 0 1 1 1 1 1 1 -1 1 -1 2 1 1 -1 -1 3 1 -1 -1 1 4 -1 -1 -1 -1 5 -1 1 -1 1 6 -1 -1 1 1 7 -1 1 1 -1 [0005] [0006] The latest IEEE802.15.4k protocol uses Orthogonal Coded Spread Spectrum (OVSF) t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7097
CPCH04B1/7097
Inventor 张润泽季汝骏
Owner 上海奥感电子科技有限公司
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