Transmission and receiving method and device for fraction Fourier domain and frequency domain joint frequency spreading signals
A fractional Fourier, frequency hopping signal technology, applied in the field of frequency hopping, can solve the problem of low spectrum utilization rate of frequency hopping communication system, and achieve the effect of improving spectrum utilization rate, realizing multiplexing, and improving system capacity
Inactive Publication Date: 2008-09-10
HARBIN INST OF TECH
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[0003] The present invention solves the shortcoming of low frequency spectrum utilization in the existing frequency hopping communication system, and provides a method and device for transmitting and receiving frequency hopping signals in the fractional Fourier domain and frequency domain, that is, the fractional domain frequency hopping method and the traditional carrier frequency hopping Combining the two channels of frequency hopping signals in parallel to obtain a joint frequency hopping communication system
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specific Embodiment approach 1
[0021] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment;
[0022] The transmission method of the joint frequency hopping signal in the fractional domain and the frequency domain in this embodiment is:
[0023] Steps of signal generation: the signal source generates a transmission signal c(t), and converts the transmission signal c(t) through serial / parallel conversion to obtain two binary digital signals, and the two binary digital signals are respectively the first transmission channel signal c 1 (t) and the second sending signal c 2 (t);
[0024] Send signal c to the first channel 1 (t) The step of performing fractional domain frequency hopping: sending the fractional domain frequency hopping sequence generator to generate a frequency hopping sequence, generating a frequency hopping pattern by the sequence value of the frequency hopping sequence, and cutting the signal generator in real time according to the frequency hopping pat...
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An emission and receiving method for frequency hopping signals combined by a fractional Fourier domain and a frequency domain as well as a device thereof are provided. The invention relates to a frequency hopping technology in wireless communications and solves the defect that the utilization ratio of frequency spectra in the traditional frequency hopping communication system is not high. Two channels of binary digital signals are obtained by a signal source at a signal sending terminal and then one channel of binary digital signals is modulated to fractional domain frequency hopping signals and the other channel is modulated to traditional carrier frequency hopping signals. Mixed frequency hopping signals are obtained by adding the two channels of signals. At a receiving terminal, firstly received signals are fractional domain de-hopped. The fractional domain frequency hopping signals are filtered from the received signals by the other demodulator circuit and then the frequency domain de-hopping is processed and demodulated to obtain frequency domain de-hopping signals. Finally the obtained fractional domain de-hopped signals and demodulated signals are changed in series/parallel so as to obtain subscriber signals. The combined frequency hopping method realizes the transmission of two-way data in the same frequency band range so as to greatly improve the system capacity of the communication system.
Description
technical field [0001] The invention relates to a frequency hopping technology in wireless communication, in particular to a method and device for transmitting and receiving frequency hopping signals in fractional domain and frequency domain. Background technique [0002] The frequency hopping communication system refers to a communication system in which the carrier frequency of a user hops within a wide frequency range according to a certain frequency hopping pattern (the frequency hopping pattern is different for different users). After the information signal undergoes waveform transformation (information modulation), it is sent to people for carrier modulation. The carrier is generated by a hopping frequency synthesizer controlled by a frequency hopping sequence (pseudo-random sequence), and its frequency changes with the sequence value of the frequency hopping sequence. Therefore, the carrier is first modulated by the frequency hopping sequence, which is called frequenc...
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IPC IPC(8): H04B1/713H04L27/26H04B1/7156
Inventor 沙学军唐珣宁晓燕迟永钢吴宣利梅林吴少川
Owner HARBIN INST OF TECH
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