Multiple-complex system of high efficiency digital television transmitter and implementing method thereof
A digital TV and transmitter technology, applied in the field of multi-integrated systems, can solve the problems of signal power average value and envelope peak value difference, affecting signal coverage quality, MER index deterioration, etc., to achieve high efficiency, improved efficiency and low cost of the whole machine Effect
Inactive Publication Date: 2014-07-23
上海东洲罗顿通信股份有限公司
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Problems solved by technology
A common feature of these modulated signals is that there is a difference between the average value of the signal power and the peak value of the envelope, resulting in a relatively large peak-to-average value, which requires the amplifier to have good linear characteristics
Otherwise, affected by nonlinearity, it will lead to signal spectrum regeneration, resulting in degradation of MER index, thereby affecting the coverage quality of the signal
Method used
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[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0035] see figure 1 , the present invention provides a multi-body system of a high-efficiency digital television transmitter. The circuit of the multi-body system is mainly composed of elements such as radio frequency input RFin, power divider PS, main amplifier MAIN, auxiliary amplifier AUX, wavelength transmission line QWTL, and load Load. device composition.
[0036] The circuit connection of the multi-body system is as follows:
[0037] The RF input RFin is connected to the power splitter PS, the other end of the power splitter PS is respectively connected to the main amplifier MAIN and the auxiliary amplifier AUX, the other end of the main amplifier MAINS is connected to the wavelength transmission line QWTL, and the other end of the wavelength transmission line QWTL is respectively connected to the auxiliary amplifier AUX and the load Load. Th...
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The invention relates to a multiple-complex system of a high efficiency digital television transmitter and an implementing method thereof. The multiple-complex system comprises a radio frequency input, a power distributor, a main amplifier, an auxiliary amplifier, a wave length transmission line and a load. The radio frequency input is connected with the power distributor, the other end of the power distributor is respectively connected with the main amplifier and the auxiliary amplifier, the other end of the main amplifier is connected with the wave length transmission line, the other end of the auxiliary amplifier is respectively connected with the wave length transmission line and the load. The implementing method of the multiple-complex system comprises the steps of enabling the power distributor to distribute a radio frequency input signal, transmitting one signal to the main amplifier and transmitting the amplified signal to the quarter-wave transmission line; transmitting the other signal to the auxiliary amplifier, transmitting the amplified signal to the quarter-wave transmission line and then performing processing for output. By adopting the multiple-complex system of the high efficiency digital television transmitter and the implementing method and under the condition that the linear requirement of the system is fully met, the efficiency can be remarkably improved, the efficiency of a traditional high-power digital television transmitter can be improved from 10%-13% to 30%-35%, energy is saved, and the cost is reduced.
Description
technical field [0001] The invention belongs to the communication field, and relates to a high-efficiency digital television transmitter multi-integration technology, specifically a multi-integration system and an implementation method thereof. Background technique [0002] With the rapid development of digital TV technology, the OFDM modulation method with high spectral efficiency has been widely used. A common feature of these modulated signals is that there is a difference between the average value of the signal power and the peak value of the envelope, resulting in a relatively large peak-to-average value, which requires the amplifier to have good linearity. Otherwise, affected by the nonlinearity, it will lead to signal spectrum regeneration, resulting in the deterioration of the MER index, thereby affecting the coverage quality of the signal. In order to satisfy the linearity within the transmission dynamic range, it is required that the power amplifier in the system ...
Claims
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Inventor 兰建伙刘宇陈骏孙堪如曾惠忠
Owner 上海东洲罗顿通信股份有限公司