Mobile terminal emergency communication device and mobile terminal
A mobile terminal and emergency communication technology, applied in wireless communication, emergency/dangerous communication services, wireless communication services, etc., can solve the problems of large power amplification unit and battery, heavy weight, inconvenient to carry, etc., and achieve long communication distance , simple structure and good diffraction characteristics
Active Publication Date: 2017-03-29
QINGDAO HISENSE MOBILE COMM TECH CO LTD
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Problems solved by technology
[0004] However, the components required to communicate over a satellite air interface are generally much larger than those required for communication over a mobile cellular air interface, for example, the directional antenna of a satellite phone is usually large so that its directional gain can overcome the satellite signal The inherent high loss of transmission; the volume of the power amplification unit and battery installed inside the satellite phone is also very large, which is also necessary to overcome the high loss of satellite signal transmission
Therefore, compared with ordinary cellular phones, satellite phones equipped with the above-mentioned communication elements have the problems of large volume, heavy weight and inconvenient portability.
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[0021] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0022] Aiming at the problem that the emergency communication function of the mobile terminal in the prior art is not perfect, the embodiment of the present invention provides a mobile terminal emergency communication device, on the basis of the FM (Frequency Modulation, frequency modulation) circuit in the existing mobile terminal, an additional A single-pole double-throw switch, a power amplif...
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The invention relates to a mobile terminal emergency communication device and a mobile terminal. The emergency communication device is additionally provided with a first single-pole double-throw switch, a first power amplifier, an up-converter and a microphone based on a frequency modulation (FM) circuit in the existing mobile terminal, and thus the communication device simultaneously having FM signal transmitting and receiving functions is formed. During a communication process, an audio signal receiving function can be achieved by connecting the single-pole double-throw switch with a signal input end of the first low-noise amplifier, or an audio signal transmitting function can be achieved by connecting the single-pole double-throw switch with a signal output end of the first power amplifier. According to the emergency communication device, fewer circuit elements are added based on the existing FM circuit structure, and thus the purpose of performing voice communication without coverage of operator networks can be achieved, and the structure is simple; in addition, the FM broadcast band is used for performing emergency communication, the FM is long-wave communication, and signals of the frequency band have the advantages of good diffraction characteristic and long communication distance.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a mobile terminal emergency communication device and a mobile terminal. Background technique [0002] At present, communication systems such as GSM (Global System for Mobile Communication, Global System for Mobile Communication) and CDMA (Code Division Multiple Access, Code Division Multiple Access) that develop rapidly have created great convenience for people's work and life, but, The operation of the above-mentioned communication systems all need to rely on the ground communication network and power system. Therefore, in the event of a major disaster or no signal coverage in a remote location, the function of voice or multimedia communication cannot be realized. [0003] Based on the above reasons, people usually use satellite phones for emergency communication when encountering special situations such as disasters and remote locations without operator network c...
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IPC IPC(8): H04B7/185H04B1/40H04B1/401H04B1/44H04W4/22H04W4/90
CPCH04B1/40H04B1/401H04B1/44H04B7/1853H04W4/90
Inventor 仝清付郑江伟隋晓东
Owner QINGDAO HISENSE MOBILE COMM TECH CO LTD