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Digital communication system

A digital communication system and signal technology, applied in the field of electronic information and wireless communication systems, can solve the problems of signal instability, poor anti-interference, transmission efficiency, etc., to improve anti-interference ability, ensure call effect, and improve signal transmission efficiency Effect

Inactive Publication Date: 2015-06-03
林南
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Problems solved by technology

[0003] In order to overcome the problems of signal instability, poor anti-interference and low transmission efficiency in existing digital communication systems, the present invention provides a digital communication system

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  • Digital communication system

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Embodiment Construction

[0009] The digital communication system principle of the present invention is as figure 1 As shown in the figure, in the digital communication system, the information source transmits the signal to the modulator through the information coding module and the channel coding module. module and the source decoding module are sent to the receiver. The trustee receives signals through a GPS receiver, and the channel coding module uses Huffman coding. The basic idea of ​​Huffman coding is: take a shorter code length for symbols with a higher probability of occurrence; and a longer code length for symbols with a lower probability of occurrence, so it is a variable-length code. Huffman coding can produce the optimal source coding, but the prerequisite is to know the probability of occurrence of all source symbols, which is often impossible to achieve. Unlike Huffman coding, the source coding algorithm is designed to be consistent with the statistical characteristics of the source The...

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Abstract

The invention discloses a digital communication system. A signal source transmits a signal to a modulator through an information coding module and a channel coding module; a modulator output signal and a signal of an interference source are connected with a demodulator through a channel; after being output by the demodulator, the signals are sent to a trustee through the channel coding module and a signal source decoding module. The digital communication system disclosed by the invention improves the signal transmission efficiency and guarantees a conversation effect, so that the voice quality can be compared with wired voice communication; moreover, the channel coding module adopts Huffman coding, so that the anti-interference ability is improved.

Description

technical field [0001] The invention relates to the field of electronic information, in particular to the field of wireless communication systems. Background technique [0002] With the development of electronics and informatization and the continuous increase of demand, wireless communication systems have played an increasingly important and irreplaceable role. The wireless communication system, also known as the radio communication system, is composed of three parts: sending equipment, receiving equipment, and wireless channels, and uses wireless electromagnetic waves to realize information and data transmission systems. It is classified according to the working frequency band or transmission means, and can be divided into medium wave communication, short wave communication, ultrashort wave communication, microwave communication and satellite communication. Fading and interference are two unique problems in wireless communication. How to suppress these two problems has al...

Claims

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Application Information

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IPC IPC(8): H04L1/00
Inventor 林南
Owner 林南