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Frequency hopping method suitable for scatter communication system

A technology of scattering communication and frequency hopping, applied in the field of communication, can solve problems such as low system performance and increased signal processing complexity at the receiving end, achieve broad market prospects, meet high-speed and high-real-time requirements, and improve performance.

Inactive Publication Date: 2019-03-01
北京慧清科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional frequency diversity scheme still has the following disadvantages in actual use: the system performance is low when there are few diversity branches, and the complexity of signal processing at the receiving end will greatly increase when there are many diversity branches

Method used

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  • Frequency hopping method suitable for scatter communication system
  • Frequency hopping method suitable for scatter communication system
  • Frequency hopping method suitable for scatter communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A frequency hopping method suitable for scatter communication systems, refer to figure 1 , which includes the following steps:

[0025] 1) Sending signal: the signal is encoded, interleaved, group hopping and modulated by the sending end to obtain the modulated signal, and then up-converted to the transmission frequency under the control of the frequency hopping pattern, and then sent to the channel;

[0026] Wherein, the signal is a low-speed waveform whose rate is 32K (ie 32kbit / s); the time length of one frame of the low-speed waveform is 1024 milliseconds, and each frame is composed of 16 time slots, and each time slot has 8 jumps data, and the length of each jump is 8 milliseconds; the encoding uses a Turbo code with a code rate of 1 / 4; the group jump is to divide the signal into 8 sections of data on average; the modulation is performed using binary phase shift keying technology modulation;

[0027] 2) Receive signal: Synchronize the frequency hopping pattern to...

Embodiment 2

[0031] A frequency hopping method suitable for scatter communication systems, please refer to Figure 1-3 , which includes the following steps:

[0032] 1) Sending signal: the signal is encoded, interleaved, group hopping and modulated by the sending end to obtain the modulated signal, and then up-converted to the transmission frequency under the control of the frequency hopping pattern, and then sent to the channel; wherein, the The sending end includes an encoding module, an interleaving module, a group hopping module and a modulation module connected in sequence;

[0033] 2) Receiving signal: Synchronize the frequency hopping pattern to the receiving end corresponding to the sending end by down-conversion, and then send the data to the decoder for decoding after demodulation, de-hopping and de-interleaving in sequence; , the receiving end includes a demodulation module, a de-hopping module, a de-interleaving module and a decoding module connected in sequence, and the decod...

Embodiment 3

[0037] A frequency hopping method suitable for scatter communication systems, please refer to figure 1 , which includes the following steps:

[0038] 1) Sending signal: the signal is encoded, interleaved, group hopped and modulated by the sending end to obtain the modulated signal, and then up-converted to the transmitting frequency under the control of the frequency hopping pattern, and then sent to the channel; the sending end It is composed of encoding, interleaving, group hopping, modulation and up-conversion modules. The modulated signal is up-converted to the transmission frequency under the control of the frequency hopping pattern, and finally sent to the channel;

[0039] 2) Receiving signal: Synchronize the frequency hopping pattern to the receiving end corresponding to the sending end by down-conversion, and then send the data to the decoder for decoding after demodulation, de-hopping and de-interleaving in sequence; The receiving end corresponds to the sending end ...

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Abstract

The invention discloses a frequency hopping method suitable for a scatter communication system, and relates to the technical field of communication. The frequency hopping method comprises the following steps: 1) transmitting a signal; and 2) receiving the signal. According to the frequency hopping method disclosed by the invention, the scatter channel fading is resisted by using frequency hopping,interleaving and coding through the hidden diversity technology, the high rate and high real-time requirements of the system are met, the performance of the traditional scatter communication system is greatly improved without increasing the system complexity or hardware equipment, the problem that the traditional frequency diversity scheme causes high system complexity and low performance when used for coping with the channel fading phenomenon, the complexity of the traditional scatter communication system is simplified, the system cost is reduced, and the market expectation is broad.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a frequency hopping method suitable for a scattering communication system. Background technique [0002] With the continuous development of science and technology, communication technology has also developed rapidly. Among them, scatter communication is a beyond-the-horizon communication technology that utilizes the scattering effect of electromagnetic waves generated by the inhomogeneity of the air propagation medium such as the troposphere and ionosphere, and has been widely used in the field of communication technology. Because the tropospheric space is not an ideal free space, the inhomogeneous body of the atmosphere produces chaotic reflection and refraction of part of the energy of the radio wave, thus forming multipath transmission, resulting in serious channel fading in the scattering communication system. To solve the above phenomenon, traditional methods are usual...

Claims

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Application Information

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IPC IPC(8): H04B1/715H04L27/20
CPCH04B1/715H04B2001/7152H04B7/22Y02D30/70
Inventor 石全旺刘鹏杨晓青
Owner 北京慧清科技有限公司
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