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Remote distance wireless transmission method

A wireless transmission, long-distance technology, applied to long-distance and high-speed wireless transmission methods, can solve the problems of reducing communication confidentiality, avoid the waste of resources, meet the data transmission capability of burst traffic, and ensure transmission security. Effect

Inactive Publication Date: 2009-06-17
林志华
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Furthermore, due to the relatively free use of the frequency band, the confidentiality of communication is reduced. In some special occasions, the encryption of the baseband signal is an important problem that must be solved.

Method used

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Embodiment Construction

[0022] In known wireless transmission systems, adaptive access to idle spectrum has been developed. For example, Chinese patent CN101039462A published on September 19, 2007 discloses a method for selecting dynamic frequencies between basic service sets of the same channel. A device performs negotiation with the second device to obtain the channel to be used by the first device and the channel to be used by the second device as well as the information of the channel, and through the method of negotiation, the idle channel can be used for multiple channels with adaptive access function The common communication system can really improve the spectrum utilization. On this basis, the long-distance wireless transmission method provided by the embodiment also includes automatic control of the transmission system.

[0023] 1 to 5, the embodiment provides a long-distance wireless transmission method, which can realize real-time full-duplex point-to-point, point-to-multipoint transmissio...

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Abstract

The invention provides a remote wireless transmitting method for self-adaptively adjusting optimum modulation modes under the precondition that the communication quality is guaranteed. The modulation mode comprises: sending a series of test data to an information sink by an information source, determining to adopt one of QPSK, 16QAM, 64QAM or 126QAM as a transmission system according to the bit error rate and the transmission speed of the test data by the information sink, feeding back to the information source, modulating to a corresponding transmission system according to feedback information of the information sink by the information source, then, sending data to the information sink, selecting a suitable transmission system according to the bit error rate and the transmission speed of received data by the information sink, feeding back to the information source, adjusting a corresponding transmission system and the speed in real time according to the feedback information of the information sink by the information source, sending the data to the information sink, and thereby self-adaptively realizing the optimization of the data transmission efficiency according to the transmission environment and the speed demands. The method is applied in wireless data digital transmission with long distance and high speed.

Description

technical field [0001] The present invention relates to a communication method, in particular to a long-distance and high-speed long-distance wireless transmission method, which is applied to point-to-point, point-to-multipoint, terminal Data transmission at the opposite end, especially in the fields of wireless access, transmission links, expansion of existing communication channels, low-cost routing applications, long-distance communication links, cellular base station connections, railway communications, and military communications. Background technique [0002] The design of public wireless communication systems is based on static, that is, after the frequency band is assigned by the national radio management department, the communication system can only work in the assigned dedicated frequency band, using a single proprietary modulator / demodulator, channel protocol, etc. Even multi-band phones only switch between a few predefined frequency bands. This design is usually...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/02H04B7/15H04L1/00
Inventor 林志华
Owner 林志华
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