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A fm/chirp waveform segmentation multiplex communication method and its application system

A waveform segmentation and multi-channel communication technology, applied in the field of communication, can solve the problem that Chirp pulse carrier is not used for multi-channel communication

Inactive Publication Date: 2011-12-14
周运伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the chirp pulse carrier waveform has excellent autocorrelation characteristics, multiple chirp pulse carrier waveforms with the same center frequency and sweep bandwidth but different sweep rules can achieve orthogonal or weak cross-correlation; however, due to the demodulation method The restriction of Chirp pulse carrier is generally not used to realize multi-channel communication

Method used

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  • A fm/chirp waveform segmentation multiplex communication method and its application system
  • A fm/chirp waveform segmentation multiplex communication method and its application system
  • A fm/chirp waveform segmentation multiplex communication method and its application system

Examples

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Embodiment 1

[0131] This embodiment is used to illustrate the working process of a FM / Chirp waveform division multiplexing communication system used in the downlink channel between the base station and the mobile station, and its system structure is as follows Figure 9 shown.

[0132] In the downlink transmission part (901) of the base station, a baseband total signal a(t) to be transmitted is decomposed into two branches of the baseband sub-signal b to be transmitted through the baseband splitter (908) i (t)(1≤i≤2); In the first branch, the baseband sub-signal b to be transmitted will be transmitted according to the FM / Chirp composite frequency modulation method 1 (t) sent to the modulator (909) of the first branch for carrier modulation to generate the modulated carrier c of the first branch 1 (t), the modulated carrier c 1 (t) output to the resonant power amplifier (911); the output d of the resonant power amplifier (911) 1 (t) As one output of the downlink transmitting part (901) o...

Embodiment 2

[0141] This embodiment is used to illustrate the working process of an uplink FM / Chirp waveform division multiple access communication system that realizes co-frequency coverage in two base stations. Taking the situation where there are 2 base stations and each base station has a corresponding mobile station as an example, the system structure is as follows Figure 10 shown.

[0142] In the transmitting part (1001) of mobile station A, baseband signal b to be transmitted A (t) carry out carrier modulation by FM / Chirp modulator (1013), the modulated carrier c of its output A (t) as the input of the resonant power amplifier (1014); the output d of the resonant power amplifier (1014) A (t) Input to wireless channel (1009) and wireless channel (1012) through transmit antenna (1003). Similarly, in the transmitting part (1002) of the mobile station B, the baseband signal b to be transmitted is B (t) carry out carrier modulation by FM / Chirp modulator (1013), the modulated carrier...

Embodiment 3

[0153] This embodiment is used to illustrate the working process of an uplink TDMA / FCWDMA system that realizes co-frequency coverage in two base stations. Taking the situation where there are 2 base stations and each base station has 2 corresponding mobile stations as an example, the system structure is as follows Figure 11 shown. Figure 11 The mobile station A1 transmitting part (1101), the mobile station A2 transmitting part (1107), the mobile station B1 transmitting part (1103) and the mobile station B2 transmitting part (1109) shown in Figure 6 Shown in (b); The composition structure of base station A receiving part (1105) and base station B receiving part (1111) is as follows Figure 6 (c) shown.

[0154] Figure 11 All the transmitting antennas, all the receiving antennas and the wireless channels between all the antennas form a wireless channel such as Figure 7 The passive MIMO channel shown; wherein, the receiving antenna (1106) is equivalent to the channel com...

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Abstract

The invention relates to an FM / Chirp waveform division multiplex communication method and an application system thereof, belonging to the field of communication. The FM / Chirp waveform segmentation multi-channel communication method is: according to the FM / Chirp composite frequency modulation method, each baseband signal to be transmitted is subjected to carrier modulation, and the frequency domain position overlap, time domain position overlap and waveform mutual correlation degree of the corresponding number of channels are obtained. The modulated carrier is lower than the specified value; demodulate and recover the restored samples of each baseband signal to be transmitted from the synthetic communication signal formed by each modulated carrier through power amplification, attenuation, delay and linear superposition processing, and use each The inter-correlation degree of the modulated carrier waveform of one channel is lower than the specified value to suppress the interference brought by other modulated carriers; the present invention also provides the FCWDM system, FCWDMA system, uplink TDMA / FCWDMA system and downlink TDMA system realized by this method / FCWDMA system. The FM / Chirp waveform division multi-channel communication method and its application system provided by the present invention can realize multi-channel simultaneous transmission at the same frequency, and can use resonance power amplification to realize high-power transmission.

Description

technical field [0001] The invention relates to an FM / Chirp waveform division multiplex communication method and an application system thereof, belonging to the field of communication. Background technique [0002] In multi-channel communication, there are three main types of signal division methods: time division, frequency division, and pattern division; among them, time division uses the orthogonal characteristics of each communication signal in the time domain, and frequency division uses each Orthogonal characteristics of communication signals in the frequency domain, while pattern segmentation utilizes the orthogonal or quasi-orthogonal (weak cross-correlation) characteristics between pseudo-noise codes of various channels. [0003] In code division multiplex communication, the frequency domain position of each communication signal can completely overlap or partially overlap with the frequency domain position of other communication signals, and the time domain position...

Claims

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Application Information

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IPC IPC(8): H04L27/12H04L27/14
CPCH04L27/103H04J11/0036
Inventor 周运伟
Owner 周运伟
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