| 摘要 |
A signal receiver for receiving IP-television signals using WiMAX technologies comprises an antenna switch, three band-pass filters, an anolog-to-digital converter, a demultiplexer, whose first input is connected to an audio signal decoder, whose output is connected to an audio interface unit, the second demultiplexer output is connected to a video signal decoder, whose output is connected to a data output device, whose second input is connected to a logic device, an identification block, an analog-to-digital converter, a pre-amplifier unit, whose input is connected to the antenna switch, whose input is connected to a pass-band filter, the output of pre-amplifier unit is connected to a finite amplification unit, whose output is connected to an input of separating unit, whose outputs are connected to the inputs of bass-band filters, the outputs are connected to the analog-to-digital converters, the outputs are connected to an OFDM demodulator input, whose output is connected to an input of adaptive digital pass-band filter, whose output is connected to a code converter input, the output is connected to the demultiplexer, whose first output is connected to a sound decoder, whose output is connected to the audio interface unit, the second demultiplexer output is connected to the first input of video signal decoder, whose output is connected to the information output device, a control microcontroller is connected to the second decoder input, whose first output is connected to the information output device, the second output is connected to the code converter, the input is connected to an identification unit, the output of device is connected to the OFDM modulator input, whose outputs are connected to the inputs of analog-to-digital converters, whose outputs are connected to the pass-band filters, whose outputs are connected to an adder, whose output is connected to a preamplifier input, whose output is connected to the finite amplification unit, whose output is connected to the antenna switch input, the input is connected to one of the signal detector outputs. |
