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Multi-carrier frequency hopping communication system based on on-off keying (OOK) modulation

A frequency hopping communication, multi-carrier technology, applied in the field of communication, can solve the problems of discontinuous signal phase, low spectrum utilization, difficult implementation of phase shift keying modulation, etc., to save transmission power, high transmission efficiency, and improve spectrum utilization. rate effect

Inactive Publication Date: 2013-04-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

Since the frequency switching during the implementation of FH will cause the phase discontinuity of the signal, phase shift keying modulation is difficult to achieve, so FH is usually modulated with MFSK
The use of MFSK modulation will result in low spectrum utilization

Method used

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  • Multi-carrier frequency hopping communication system based on on-off keying (OOK) modulation
  • Multi-carrier frequency hopping communication system based on on-off keying (OOK) modulation
  • Multi-carrier frequency hopping communication system based on on-off keying (OOK) modulation

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Embodiment Construction

[0016] The invention proposes a multi-carrier frequency hopping communication system based on OOK modulation. like figure 2 As shown, it includes a transmitting end and a receiving end, the transmitting end includes a coding unit, a data modulation unit, a frequency hopping modulation unit, and a radio frequency transmitting unit, and the receiving end includes a radio frequency receiving unit, a frequency hopping demodulation unit, a data demodulation unit, and a decoding unit ;

[0017] The input end of the encoding unit is connected to the signal source output, the output end of the encoding unit is connected to the input end of the data modulation unit, the output end of the data modulation unit is connected to the input end of the frequency hopping modulation unit, and the output end of the frequency hopping modulation unit is connected to the radio frequency The input terminals of the transmitting unit are connected;

[0018] The output end of the radio frequency rece...

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Abstract

The invention provides a multi-carrier frequency hopping communication system based on on-off keying (OOK) modulation. The multi-carrier frequency hopping communication system based on the OOK modulation comprises a launching terminal and a receiving terminal, wherein the launching terminal comprises a coding unit, a data modulation unit, a frequency hopping modulation unit and a radio-frequency emission unit and the receiving terminal comprises a radio-frequency receiving unit, a frequency hopping demodulation unit, a data demodulation unit and a decoding unit. The data modulation unit comprises a series-to-parallel module, an OOK modulation module and a carrier wave combination module. The data modulation unit comprises a parallel-to-series module, a filtration module, an energy calculation module and a judging module. The multi-carrier frequency hopping communication system based on the OOK modulation can improve spectrum efficiency. When the number of a subcarrier is M, a multi-carrier OOK modulation can transmit M bit of information in parallel once. Compared with an existing frequency hopping system with multi-frequency-shift keying (MFSK) modulation, the spectrum efficiency is improved.

Description

technical field [0001] The invention belongs to communication technology, in particular to multi-carrier (MC: Multicarrier) frequency hopping communication technology. Background technique [0002] Frequency hopping (FH: Frequency hopping), referred to as frequency hopping, is usually used in conjunction with M-ary frequency shift keying (MFSK: Multiple Frequency-Shift Keying) modulation, consisting of a set of k=log 2 The M binary codes are converted into multi-ary codes with M states, and the M states correspond to M different carrier frequencies. Taking 4FSK as an example, the system can convert 2-bit binary code into four states (0, 1, 2, 3), and these four states correspond to 4 carriers of different frequencies. The MFSK signal hops pseudo-randomly within the frequency hopping bandwidth. For a typical FH / MFSK system block diagram, see figure 1 . Sending end: After the information source is channel-coded, the MFSK modulation module converts every k bits of the input ...

Claims

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Application Information

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IPC IPC(8): H04L27/10
Inventor 董彬虹邹洋宋延光周兰林乐荣臻
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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