Digital microwave transmission systems SB extra-INTERVAL over water

摘要

The invention relates to radio communications and may be used in the construction of digital radio transmission systems at extra-interval above the water surface. When organizing radio link (RRL) above the water surface must be considered that water has a high reflectivity over water powerful atmospheric processes occur in the lower troposphere more rapidly than over land, the formation of layered inhomogeneities. This greatly influences the propagation of radio waves, the main beam can bend, it creates the conditions for spreading and multipath fading causes signal deterioration parameters Parameter Errors and readiness relay paths. The result, which is obtained by the proposed device - to increase reliability of information transmitted over the extra-portions of water surface, reducing the amount of radio frequency and modem equipment, more efficient use of the radio spectrum, reducing the cost of the radio. Digital radio relay transmission system with extra-interval above the water surface, resistant to multipath conditions comprises relay stations, each of which consists of transmitting and receiving devices connected to an antenna through a duplexer, a switch connected to the communication line, the first signal processing apparatus configured a series-connected unit conversion signal streams, block matching packet flow rate coding block and a modulator, wherein input conversion unit signal flow is connected to the first terminal of the switch, and the output of the modulator is connected to the input of the transmitting device, a second signal processing apparatus configured as a series-connected demodulator, the decoding unit, the block matching packet flow rate and the block transform signal streams, wherein the input of the demodulator connected to the output of the receiving device, and the output signal streams conversion unit is connected to the second terminal of the switch.