1-21976-4

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The 1-21976-4 application field and working principle are comprehensive and complex. 1-21976-4 is a set of protocols for the long range wireless telecommunication network. It is based on the use of time multiplexing and pulse-code modulation techniques for transmitting voice and data over radio systems. It supports communications between one or multiple sites based on a single frequency or multiple frequencies.

1-21976-4 is a long range wireless communication protocol suitable for a variety of industries and applications. It is widely used for applications that require long distances or high speed links, such as wireless security, remote sensing, unmanned aerial vehicles (UAVs), smart metering, and military communications. This protocol supports voice and data communications over the long range wireless radio systems.

The working principle of 1-21976-4 is based on the time division multiplexing approach, which is the integration of various traffic in one frequency channel and delivery of that traffic to the receiving end. It is based on two parts: 1) frequency planning strategy and 2) modulated spectra for the different channels. In this protocol, the frequency plan strategy includes selection of the frequency band which takes into account radio interference, noise, etc. The modulated spectra is defined for each channel, which depends on the type of data. The transmitted data is packetized, and the receiver has to reconstruct the packets.

In the 1-21976-4 protocol, the demodulation of received signal consists of two stages: 1) Frequency error correction, where the receiver compares the received signal frequency with the reference frequency and corrects the received signal\'s frequency. 2) Symbol decoder. This is the phase where the received signal is demodulated, and symbols are decoded from the signal based on the channel\'s modulated spectra. Then the original packet recovered from the signal.

1-21976-4 is an efficient protocol designed for long range wireless communication. It is an important part of the modern communication systems and provides higher data rate and stronger interference immunity compared to other wireless protocols. It is used in many applications such as remote sensing, wireless security, and aerial communication to send and receive telecommunication signals between one or multiple sites. The frequency planning strategy and symbol decoding process contribute to the efficiency of the protocol.

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