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A technology of pulse communication and communication device, applied in the field of communication, can solve the problems of short transmission distance, low gain, large power loss, etc., and achieve the effect of increasing transmission distance and improving crosstalk.
Inactive Publication Date: 2002-10-02
陈克炯
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[0006] Large power loss, severe waveform distortion, poor signal-to-noise ratio, inter-symbol interference, and short transmission distance, the longest distance (single station) is only 1.7 kilometers, and the number of relay stations is only ≤10
[0007] 2. When the device works in a rectangular pulse, not only the gain is low, but also the transmission power is low
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[0031] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0032] The present invention changes the traditional rectangular pulse (square wave pulse) into cosine pulse communication, which has two types: one is cosine pulse code modulation communication, and the difference between it and square wave pulse code modulation communication is that in square wave pulse code modulation Before the signal is sent to the channel, the square wave pulse is converted into a cosine pulse by an electronic switch, and the cosine pulse code modulation signal is transmitted on the channel. The other is cosine pulse analog modulation communication. The difference between it and square wave pulse analog modulation communication is that the switching pulse is changed from square wave pulse to cosine pulse, and the cosine pulse analog modulation signal is transmitted on the channel.
[0033] Above-mentioned communication method, whe...
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Abstract
The present invention relates to the technical field of communication, in particular to a pulse communication method and its device that uses cosine pulse instead of square wave pulse communication, two communication devices designed according to the cosine pulse analog modulation or code modulation signal transmitted on the channel, its A communication circuit for converting square wave pulses into cosine pulses is provided in the shell. Because the present invention has the greatest advantage of narrow occupied frequency band, it also has the advantages of high output power, long transmission distance, no intersymbol interference, significant improvement of signal-to-noise ratio and crosstalk, and the like. In addition, when the sender changes to cosine pulse transmission, the receiver can receive without modification, and the communication quality is greatly improved.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to a pulse communication method and a device thereof. Background technique [0002] As we all know, communication technology is about the generation, processing, exchange, recording, copying, sending, transmission and reception of electrical signals. At this time, electrical signals are the carriers of information, so communication technology is also called the transmission technology of electrical signals. Information is included in all source signals that need to be transmitted, such as text, data, voice, images, and sensors. Different source signals constitute different communication systems, such as telegraph, telephone, radio, fax, television, radar, Remote control, telemetry and artificial intelligence to name a few. The communication system includes signal source, converter, channel, inverse converter and sink, etc., and is usually s...
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