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Single Frequency Network System of Digital Television Transmission using Studio-Transmitter Link for an Analog Broadcasting
Single Frequency Network System of Digital Television Transmission using Studio-Transmitter Link for an Analog Broadcasting
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机译:使用演播室-发射机链路进行模拟广播的数字电视传输的单频网络系统
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摘要
An SFN(Single Frequency Network) system using an STL(Studio to Transmitter Link) for analog broadcasting in a digital TV transmitter is provided to compose an SFN using a conventional analog STL system without an additional cost, and delay a signal by a desired time and transmit the delayed signal by composing a digital delay unit in each transmitter. An I/Q(Inphase/Quadrature) demodulating unit(51) demodulates an IF(Intermediate Frequency) signal into a baseband I/Q signal. A digital processor(52) compensates and delays the channel distortion of the signal outputted from the I/Q demodulating unit. An I/Q modulating unit(53) modulates the signal outputted through the digital processor. A frequency up-converter(54) converts the output signal of the I/Q modulating unit into a desired frequency band. An HPA(High Power Amplifier)(55) amplifies the signal converted in the frequency up-converter.
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机译:提供了一种在数字电视发射机中使用STL(演播室到发射机链接)进行模拟广播的SFN(单频网络)系统,以使用常规的模拟STL系统组成SFN,而无需额外的费用,并且将信号延迟了所需的时间通过在每个发射机中组成一个数字延迟单元来发送该延迟信号。 I / Q(同相/正交)解调单元(51)将IF(中频)信号解调为基带I / Q信号。数字处理器(52)补偿并延迟从I / Q解调单元输出的信号的信道失真。 I / Q调制单元(53)对通过数字处理器输出的信号进行调制。频率上变频器(54)将I / Q调制单元的输出信号转换成期望的频带。 HPA(高功率放大器)(55)放大在频率上变频器中转换的信号。
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