WO2019095554A1 - 一种数模广播信号合路装置及方法 - Google Patents

一种数模广播信号合路装置及方法 Download PDF

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Publication number
WO2019095554A1
WO2019095554A1 PCT/CN2018/073266 CN2018073266W WO2019095554A1 WO 2019095554 A1 WO2019095554 A1 WO 2019095554A1 CN 2018073266 W CN2018073266 W CN 2018073266W WO 2019095554 A1 WO2019095554 A1 WO 2019095554A1
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signal
broadcast signal
digital
power
analog
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PCT/CN2018/073266
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English (en)
French (fr)
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甘军
吴振华
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深圳思凯微电子有限公司
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Publication of WO2019095554A1 publication Critical patent/WO2019095554A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services

Definitions

  • the present invention belongs to the field of broadcast technologies, and in particular, to a digital analog broadcast signal combining device and method.
  • the mainstream of digital audio broadcasting in the world First, the digital audio broadcasting (Digital Audio) applied in Europe Broadcasting, DAB) technology, in which DAB system occupies 2M channel bandwidth, is pure digital signal broadcasting, and cannot be compatible with China's existing analog AM/FM broadcasting; Second, world digital broadcasting technology (Digital) Radio Musice, DRM/DRM+), but the technology is not developed and promoted enough, and the industrialization is very low. Third, HD Radio (Hybrid Digital) approved by the US FCC Radio), the standard is based on in-band simulcasting. The spectrum division of the scheme is set for the US standard and is very different from the Chinese spectrum. At the same time, its technology in the United States has adopted patent protection measures, and if it is used, it needs to pay a high patent fee.
  • DAB digital audio broadcasting
  • DRM/DRM+ world digital broadcasting technology
  • HD Radio Hybrid Digital
  • the main object of the present invention is to provide a combining device and method for digital-to-analog broadcast signals, which aims to solve the technical problem that the conventional FM audio broadcasting digitalization has high transformation cost and the two signals interfere with each other seriously.
  • the present invention provides a speech signal echo canceling apparatus, the apparatus comprising: an analog signal input port, a digital signal exciter, and a signal combiner;
  • the analog signal input port is configured to acquire an analog broadcast signal to be transmitted and a target frequency band in which the analog broadcast signal is located, send the analog broadcast signal to the signal combiner, and transmit the target frequency band To the digital signal exciter;
  • the digital signal exciter is configured to generate a digital broadcast signal in the target frequency band, and transmit the digital broadcast signal to the signal combiner;
  • the signal combiner is configured to combine the analog broadcast signal and the digital broadcast signal to obtain a target digital-to-analog broadcast signal.
  • the signal combiner comprises:
  • a directional coupler for respectively receiving the analog broadcast signal and the digital broadcast signal, and coupling the analog broadcast signal and the digital broadcast signal to obtain a target digital-to-analog broadcast signal.
  • the directional coupler comprises:
  • a main signal line for receiving and transmitting the analog broadcast signal
  • the coupled signal line which is non-intersecting with the main signal line, is for receiving and transmitting the digital broadcast signal, and coupling the digital broadcast signal to the main signal line when transmitting the digital broadcast signal.
  • the signal combiner further comprises:
  • a power detecting device is disposed at an output end of the main signal line, configured to respectively perform power detection on the analog broadcast signal and the digital broadcast signal on the main signal line, compare the detection result with a preset power, and determine the coupled Whether the analog broadcast signal and the digital broadcast have power loss;
  • a power adjustment unit configured to adjust the analog broadcast signal and the digital broadcast signal according to the preset power when the analog broadcast signal and the digital broadcast signal have power loss after signal coupling according to a detection result of the signal loss detecting unit Power.
  • the digital signal exciter further comprises:
  • a digital signal generating unit configured to generate a digital broadcast signal in the target frequency band
  • a spectrum analyzer configured to acquire a spectrum distribution of the analog broadcast signal, and detect a spectrum distribution of the digital broadcast signal in the target frequency band, and determine whether a spectrum distribution of the analog broadcast signal and the digital broadcast signal overlap;
  • a frequency adjustment unit configured to adjust a spectrum distribution of the analog broadcast signal when the spectrum distribution is overlapped, so that a spectrum distribution of the digital broadcast signal does not coincide with a spectrum distribution of the analog broadcast signal
  • the spectrum adjustment unit is further configured to send the adjusted digital broadcast signal to the signal combiner.
  • the digital signal exciter further comprises:
  • a digital signal generating switch configured to send a trigger instruction to the digital signal generating unit when the analog signal input port acquires the analog broadcast signal, so that the digital broadcast signal generating unit generates a A digital broadcast signal in the target frequency band.
  • the digital-to-analog broadcast signal combining device between the digital signal exciter and the signal combiner further comprises:
  • a power adjustment system configured to acquire power of the analog broadcast signal, and receive a digital broadcast signal output by the digital signal exciter, detect power of the digital broadcast signal, and compare the number according to a preset power ratio The power of the broadcast signal is adjusted, and the power-adjusted digital broadcast signal is sent to the signal combiner.
  • the digital-to-analog broadcast signal combining device further includes:
  • a heat sink disposed between the digital signal exciter and the signal combiner.
  • the present invention also provides a digital-to-analog broadcast signal combining method, which uses the above-mentioned digital-to-analog broadcast signal combining device, which specifically includes:
  • the analog signal input port acquires an analog broadcast signal to be transmitted and a target frequency band in which the analog broadcast signal is located, transmits the analog broadcast signal to the signal combiner, and transmits the target frequency band to the digital signal Exciter
  • a digital signal exciter generates a digital broadcast signal in the target frequency band, and transmits the digital broadcast signal to the signal combiner;
  • the signal combiner combines the analog broadcast signal with the digital broadcast signal to obtain a target digital-to-analog broadcast signal.
  • the method further includes:
  • the digital signal exciter After generating the digital broadcast signal, the digital signal exciter sends the digital broadcast signal to the power amplifier adjustment system;
  • the power amplifier adjusting system further acquires the power of the analog broadcast signal, detects the power of the digital broadcast signal, and adjusts the power of the digital broadcast signal according to the preset power ratio, and then transmits the power adjusted digital broadcast signal. To the signal combiner.
  • the invention uses an analog signal input port to acquire an analog broadcast signal to be transmitted and a target frequency band in which the analog broadcast signal is located, send the analog broadcast signal to the signal combiner, and send the target frequency band to the a digital signal exciter; generating, by a digital signal exciter, a digital broadcast signal in the target frequency band, transmitting the digital broadcast signal to the signal combiner; and using the signal combiner to transmit the analog broadcast signal and
  • the digital broadcast signal is combined to obtain a target digital-to-analog signal. Since the present invention generates a digital broadcast signal in the original analog bandwidth, and the original analog broadcast signal remains unchanged during the signal combining process, the original broadcast system operates as usual, and the device of the present invention can be upgraded only by adding the original device to the original device. To the digital FM broadcasting system, which reduces the cost of digital upgrade of analog broadcasting.
  • FIG. 1 is a block diagram showing the structure of a first embodiment of a digital-to-analog broadcast signal combining apparatus according to the present invention
  • FIG. 2 is a structural block diagram of a second embodiment of a digital-to-analog broadcast signal combining apparatus according to the present invention
  • FIG. 3 is a circuit schematic diagram of a directional coupler in a signal combiner in the digital-to-analog broadcast signal combining device shown in FIG. 1;
  • FIG. 4 is a structural block diagram of a signal combiner in the digital-to-analog broadcast signal combining device of FIG. 1;
  • FIG. 5 is a structural block diagram of a digital signal exciter in the digital-to-analog broadcast signal combining device of FIG. 1;
  • FIG. 1 is a structural block diagram of a first embodiment of a digital-to-analog broadcast signal combining apparatus according to the present invention.
  • the digital-to-analog broadcast signal combining device includes: an analog signal input port 10, a digital signal exciter 20, and a signal combiner 30;
  • the analog signal input port 10 is configured to acquire an analog broadcast signal to be sent, acquire the frequency band information of the station where the analog broadcast signal is located, and then transmit the analog broadcast signal to the signal combiner;
  • the digital signal exciter 20 is configured to generate a digital broadcast signal to be transmitted, and call the radio frequency band information of the analog broadcast signal, and transmit the digital broadcast signal to the signal combiner through the same radio frequency band. ;
  • the signal combiner 30 is configured to combine the analog broadcast signal to be transmitted and the digitized signal to obtain a target digital-to-analog signal and output the same.
  • the application scenario of the digital-to-analog broadcast signal combining device proposed by the embodiment of the present invention may be a broadcast broadcast system, and the analog signal input port 10 is placed in the FM signal exciter of the digital-to-analog broadcast signal combining device. After that, after the digital-to-analog broadcast signal combining device is turned on, a system initializing operation is performed, the analog signal input port 10 performs resetting and input (Input) interface initial setting, and then the digital signal exciter 20 performs system initial setting.
  • the digital signal exciter 20 also detects whether there is a signal for stopping the generation of the digital broadcast signal, When the signal is stopped, the digital broadcast signal generating operation is ended.
  • the analog signal input port 10 after the digital-to-analog broadcast signal combining device receives the power-on command, after performing the system initialization operation, the analog signal input port 10 performs reset and input (Input) interface initialization settings, and then the digital signal The exciter 20 performs a system initialization setting to cause the digital signal exciter 20 to be in a slave state.
  • the analog signal input terminal 10 receives an analog broadcast signal generated by the FM signal exciter; when receiving the analog broadcast signal, performs communication control on the digital signal exciter 20 to enable the The digital signal exciter 20 performs digital broadcast signal generation and transmission operations.
  • the analog signal input port 10 also detects the received analog broadcast signal, detects the target frequency band of the analog broadcast signal, and then sends the target frequency band to the digital signal exciter 20, so that The digital signal exciter 20 generates a digital broadcast signal in the target frequency band and transmits it to the signal combiner 30.
  • the digital signal exciter 20 after receiving the digital broadcast signal generation control, generates a digital broadcast signal by digital audio signal (AES/EBU) or analog audio signal modulation, the digital audio signal (AES/EBU) Or the analog audio signal can be transmitted through an external audio device, or can be obtained by internally stored audio.
  • AES/EBU digital audio signal
  • AES/EBU analog audio signal modulation
  • the analog audio signal can be transmitted through an external audio device, or can be obtained by internally stored audio.
  • This embodiment does not limit this; if the analog audio signal is digital-to-analog converted (A/D) into a digital audio signal, Performing the next processing, if it is a digital audio signal, directly performing the next processing; the digital signal processor (DSP) in the digital signal exciter 20 adjusts and encodes the digital audio signal, the digital audio The signal is then subjected to frequency modulation by a direct digital synthesizer (DDS); finally, the digital FM signal is converted into a digital FM carrier signal by digital-to-analog conversion (D/A) conversion, that is, a digital broadcast signal, after generating the digital broadcast signal, the digital The signal exciter 20 transmits the digital broadcast signal to the signal combiner 30.
  • DSP direct digital synthesizer
  • the digital-to-analog broadcast signal combining device is preceded by the KW-level power amplifier system of the conventional analog broadcasting system, so that the digital-to-analog broadcast signal generated by the digital-to-analog broadcast signal combining device can pass the original KW-level power amplifier system power amplifier. Then, the antenna transmits a signal, so digital analog simulcasting can be completed without purchasing other equipment.
  • the digital signal exciter 20 may generate a digital broadcast signal by digital audio signal (AES/EBU) or analog audio signal modulation, and transmit the generated digital broadcast signal to the signal combiner 30, in addition to
  • AES/EBU digital audio signal
  • the digital-to-analog broadcast signal combining device in this embodiment further includes a heat dissipation system for dissipating heat from the internal electronic components and a power supply system (not shown) for supplying power to the device.
  • the analog signal input port acquires an analog broadcast signal to be transmitted and a target frequency band in which the analog broadcast signal is located, sends the analog broadcast signal to the signal combiner, and sends the target frequency band.
  • the digital signal exciter generating a digital broadcast signal in the target frequency band with a digital signal exciter, transmitting the digital broadcast signal to the signal combiner; and using the signal combiner to transmit the analog broadcast
  • the signal and the digital broadcast signal are combined to obtain a target digital-to-analog signal.
  • the digital signal exciter since the digital signal exciter generates a digital broadcast signal in the original analog bandwidth, and the original analog broadcast signal remains unchanged during the signal combining process, the original broadcast system operates as usual, without adding or changing other devices. Upgradeable to digital FM radio, reducing the cost of analog broadcast digital upgrades.
  • the device further includes:
  • the power adjustment system 40 is configured to acquire power of the analog broadcast signal, and receive a digital broadcast signal output by the digital signal exciter 20, detect power of the digital broadcast signal, and compare the power according to a preset power ratio. The power of the digital broadcast signal is adjusted, and the power-adjusted digital broadcast signal is sent to the signal combiner 30.
  • the power adjustment system 40 acquires the generated digital broadcast signal of the digital signal exciter 20, and also receives the analog broadcast signal, and the power of the digital broadcast signal and the analog broadcast signal. Performing detection separately, calculating a power ratio of the current two signals according to the power of the two signals, and comparing the current power ratio with a preset power ratio of the digital broadcast signal and the analog broadcast signal, and comparing the digital signal according to the comparison result
  • the power ratio of the preset two signals is not fixed in the embodiment, and may be set according to actual conditions.
  • the power adjustment system 40 includes one or more power amplifiers.
  • the power amplifier is preferably a digital power amplifier (ie, a digital power amplifier), and is used according to the result of the power comparison.
  • the digital broadcast signal is amplified or attenuated, and the power-adjusted digital broadcast signal is transmitted to the signal combiner.
  • the signal combiner 30 includes a directional coupler 310.
  • the directional coupler 310 is specifically described below in conjunction with FIG. 3:
  • the directional coupler includes: a main signal line and a coupled signal line that do not intersect each other.
  • the main signal line is configured to receive and transmit the analog broadcast signal; the coupled signal line is configured to receive and transmit the digital broadcast signal, and then couple the digital broadcast signal to a main signal line, preferably, One end of the main signal line signal is used as the input end 301 for simulating the input of the broadcast signal, and then the analog broadcast signal is transmitted on the main signal line, and one end of the coupled signal line is used as the isolated end 302, and the isolated end 302 is
  • the input terminal 301 on the main signal line is not on the same side for receiving and transmitting a digital broadcast signal whose transmission direction is opposite to the direction in which the main signal line transmits an analog broadcast signal; the digital broadcast signal is transmitted to the coupled end on the coupled signal line 303.
  • the coupling end 303 is on the same side as the input end 301 on the main signal line, and is configured to couple the digital broadcast signal to the main line to obtain a target broadcast digital-to-analog signal.
  • the directional coupler is preferably a directional coupler of microstrip parallel lines.
  • the degree of coupling C is 3 dB and the isolation is >40 dB.
  • the main signal line is in a shape of a line
  • the coupled signal line is U-shaped
  • the input terminal 301 receives an analog broadcast signal, and is forwardly transmitted through the main signal line
  • the isolated terminal 302 receives the digital broadcast signal and reverses through the coupled signal line.
  • the main signal line and the coupled signal line are parallel to form a coupling capacitor, and a 50 Ohm load is also connected to reduce signal interference during coupling. .
  • the selection of the specific load value may be selected according to actual conditions, and this embodiment does not limit this.
  • the analog broadcast signal obtained by the analog signal input end and the digital broadcast signal generated by the digital signal exciter are combined by the directional coupler to obtain a digital-to-analog broadcast signal, and the directional coupler is separated from each other by two
  • the port receives the analog broadcast signal and the digital broadcast signal, and the signal is combined by the coupling capacitor of the coupling end 303, thereby having high isolation during the combining process, so that the two signals do not affect each other.
  • the signal combiner 30 further includes:
  • the power detecting device 320 is disposed at an output end of the main signal line, and is configured to respectively perform power detection on the analog broadcast signal and the digital broadcast signal on the main signal line, compare the detection result with a preset power, and determine the coupling. Whether the analog broadcast signal and the digital broadcast have power loss;
  • the power adjustment unit 330 is configured to receive a detection result of the signal loss detecting unit, and adjust the analog broadcast signal and the digital broadcast signal according to a preset power when the analog broadcast signal and the digital broadcast signal have power loss in the combiner Power.
  • the digital-to-analog broadcast signal coupled by the directional coupler 310 needs to be power-detected by the power detecting device 320, and then the power adjustment unit 330 performs power adjustment on the digital-to-analog broadcast signal to make the power-adjusted digital-analog.
  • the broadcast signal can be matched in power to the power requirements of the original analog broadcast system.
  • the power detecting device 320 may preset a power value of the digital-analog broadcast signal and a power ratio of the analog broadcast signal and the digital broadcast signal in the digital-to-analog broadcast signal according to a power requirement of the original analog broadcast system; the directional coupler The 310 obtains a digital-to-analog broadcast signal after coupling the analog broadcast signal and the digital broadcast signal, and transmits the digital-to-analog broadcast signal from the main signal line to the power detecting device 320, and the power detecting device 320 according to the preset power value and The power ratio is compared to the digital-to-analog broadcast signal, and the digital-to-analog broadcast signal and the detection result are transmitted to the power adjustment unit 330.
  • the power adjustment unit 330 After receiving the digital-to-analog broadcast signal and the detection result, the power adjustment unit 330 performs a logarithmic mode according to the detection result. The broadcast signal is adjusted; if the detection result meets the preset power value and the power ratio, the power adjustment unit 330 does not perform any operation; if the detection result does not meet the preset power value and the power ratio, the power The adjusting unit 330 adjusts the digital-to-analog broadcast signal to a preset power value and a power ratio.
  • the signal combiner 30 performs power detection and adjustment on the digital-to-analog broadcast signal after the combined processing by the power detecting device 320 and the power adjusting unit 330, thereby improving the stability of the combined processing and ensuring digital-to-analog broadcasting.
  • the power of the signal enables the digital-to-analog broadcast signal to be broadcast normally through the original analog broadcast system.
  • the digital signal exciter 20 further includes:
  • the digital signal generating unit is configured to generate a digital broadcast signal in the target frequency band
  • the spectrum analyzer is configured to acquire a spectrum distribution of the analog broadcast signal, and detect a spectrum distribution of the digital broadcast signal in the target frequency band, and determine whether a spectrum distribution of the analog broadcast signal and the digital broadcast signal overlap ;
  • the frequency adjustment unit is configured to adjust a spectrum distribution of the analog broadcast signal when the spectrum distribution overlaps, so that a spectrum distribution of the digital broadcast signal does not coincide with a spectrum distribution of the analog broadcast signal.
  • the spectrum adjustment unit is further configured to send the adjusted digital broadcast signal to the signal combiner.
  • the spectrum analyzer 201 and the frequency band adjusting unit 202 in this embodiment are disposed at an output port of the digital signal exciter 20, and the spectrum analyzer 201 will use the digital signal before outputting the digital broadcast signal. Generating a spectrum of the broadcast signal to determine whether the digital broadcast signal is in the target frequency band, and also detecting whether the spectral distribution of the digital broadcast signal coincides with the spectral distribution of the analog broadcast signal, and transmitting the detection result to the frequency band adjustment
  • the unit 202 adjusts the frequency of the digital broadcast signal according to the detection result of the spectrum analyzer 201.
  • the frequency band adjusting unit 202 when the spectrum analyzer 201 detects that the digital broadcast signal is in the target frequency band and does not overlap with the spectrum distribution of the analog broadcast signal, the frequency band adjusting unit 202 does not perform any operation when the spectrum
  • the meter 201 detects that the digital broadcast signal is not in the target frequency band or overlaps with the spectrum distribution of the analog broadcast signal, and the frequency band adjusting unit adjusts the frequency of the digital broadcast signal to the target frequency band, and is analogous to the broadcast signal.
  • the spectrum distribution is not coincident, which ensures that the digital broadcast signal and the analog broadcast signal can be simultaneously broadcast in the same frequency band, and the two signals are not affected by each other.
  • the present invention also provides a method for combining digital-to-analog broadcast signals, wherein the method utilizes the above-mentioned digital-to-analog broadcast signal device, and the specific working principle and application of the digital-to-analog broadcast signal device in the method can refer to the above The embodiment is not described here.

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Abstract

本发明公开了一种数模广播信号合路装置及方法，所述装置包括：模拟信号输入端口，用于获取待发送的模拟广播信号及所述模拟广播信号所处的目标频段，将所述模拟广播信号发送至所述信号合路器，并将所述目标频段发送至所述数字信号激励器；数字信号激励器，用于生成处于所述目标频段中的数字广播信号，将所述数字广播信号发送至所述信号合路器；信号合路器，用于将所述模拟广播信号和数字广播信号进行合路，获得目标数模信号。本发明通过在原模拟带宽内生成数字广播信号，并且原有模拟广播信号在信号合路过程中保持不变，使得原有广播系统照常运转，只需在原有设备上增加本发明装置即可升级到数字调频广播系统，从而降低了模拟广播数字化升级的成本。

Description

一种数模广播信号合路装置及方法
技术领域
本发明属于广播技术领域，尤其涉及一种数模广播信号合路装置及方法。
背景技术
目前，全世界电视的数字化过程已经初步完成。我国数字地面电视广播（Digital Television Terrestrial Broadcasting，DTTB）、移动多媒体广播（China Mobile Multimedia Broadcasting，CMMB，即手机电视）已进入稳步发展阶段，而有线电视的数字化已商用多年，正在进入双向、高清时代。数字化带来了更高质量的节目制作、发送与接收，使得用户享有了更优质的用户体验。但是我国传统的FM音频广播的数字化改革相对落后，为了提高音频广播的节目质量，FM音频广播也面临着数字化改造。
目前全球数字音频广播主流方案：一是欧洲所应用的“数字音频广播（Digital Audio Broadcasting，DAB）”技术，在这种技术中，DAB系统占用2M信道带宽，是纯数字信号广播，无法与中国现有的模拟调幅/调频广播兼容；二是世界数字广播技术（Digital Radio Mondiale，DRM/DRM+），但该技术研发和推广力度不够，产业化很低；三是美国FCC批准的HD Radio（Hybrid Digital Radio）,该标准以带内同播为核心，其方案的频谱划分方式是针对美国的标准设定的，与中国频谱划分方式有很大不同。同时其技术美国采取了专利保护措施，若使用需要支付高额专利费。
传统FM音频广播数字化若使用当代主流技术进行升级改造面临着现有广播信号频率重新划分，同时现有数字与模拟信号进行合路，其合路器理论信号插入损耗3dB，两路信号在经过合路后信号都减少3dB，转化后发射功率将下降到原功率1/2。若使用该技术进行改造意味不仅需要重新进行广播信号频率划分，而且还要放弃现有设备，重新购买发射机激励器及其功率放大器系统，改造成本过高。而且，数字与模拟信号合路会造成信号之间的相互影响，现有方案均未能完全解决调频广播频段带内数模混合信号中两种信号的相互干扰问题。
上述内容仅用于辅助理解本发明的技术方案，并不代表承认上述内容是现有技术。
发明内容
本发明的主要目的在于提供了一种数模广播信号的合路装置及方法，旨在解决现有技术中传统FM音频广播数字化时存在改造成本高，两种信号相互干扰严重的技术问题。
为实现上述目的，本发明提供了一种语音信号回声消除装置，所述装置包括：模拟信号输入端口、数字信号激励器和信号合路器；
所述模拟信号输入端口，用于获取待发送的模拟广播信号及所述模拟广播信号所处的目标频段，将所述模拟广播信号发送至所述信号合路器，并将所述目标频段传输至所述数字信号激励器；
所述数字信号激励器，用于生成处于所述目标频段中的数字广播信号，将所述数字广播信号传输至所述信号合路器；
所述信号合路器，用于将所述模拟广播信号和数字广播信号进行合路，获得目标数模广播信号。
优选地，所述信号合路器包括：
定向耦合器，用于分别接收所述模拟广播信号和数字广播信号，并对所述模拟广播信号和数字广播信号进行耦合，获得目标数模广播信号。
优选地，所述定向耦合器包括：
主信号线，用于接收并传输所述模拟广播信号；
耦合信号线，与主信号线互不相交，用于接收并传输所述数字广播信号，在传输所述数字广播信号时，将所述数字广播信号耦合至所述主信号线。
优选地，所述信号合路器还包括：
功率检测装置，设于所述主信号线的输出端，用于对所述主信号线上的模拟广播信号和数字广播信号分别进行功率检测，将检测结果与预设功率比较，判断耦合后的所述模拟广播信号和数字广播是否有功率损耗；
功率调整单元，用于根据信号损耗检测单元的检测结果，当所述模拟广播信号和数字广播信号在信号耦合后有功率损耗时，根据所述预设功率调整所述模拟广播信号和数字广播信号的功率。
优选地，所述数字信号激励器还包括：
数字信号生成单元，用于生成处于所述目标频段中的数字广播信号；
频谱仪，用于获取所述模拟广播信号的频谱分布，并检测所述数字广播信号在所述目标频段中的频谱分布，判断所述模拟广播信号和数字广播信号的频谱分布是否存在重合；
频率调整单元，用于当所述频谱分布存在重合时，对所述模拟广播信号的频谱分布进行调整，以使所述数字广播信号的频谱分布与所述模拟广播信号的频谱分布不重合；
所述频谱调整单元，还用于将调整后的数字广播信号发送至所述信号合路器。
优选地，所述数字信号激励器还包括：
数字信号生成开关，用于在所述模拟信号输入端口获取所述模拟广播信号时，向所述数字信号生成单元发送触发指令，以使所述数字广播信号生成单元在接收触发指令后生成处于所述目标频段中的数字广播信号。
优选地，所述数字信号激励器和信号合路器之间所述数模广播信号合路装置还包括：
功率调整系统，用于获取所述模拟广播信号的功率，并接收所述数字信号激励器输出的数字广播信号，检测所述数字广播信号的功率，并根据预设的功率比，对所述数字广播信号的功率进行调整，再功率调整后的数字广播信号发送至信号合路器。
优选地，所述数模广播信号合路装置还包括：
设于所述数字信号激励器和信号合路器之间的散热器。
此外，本发明还提出一种数模广播信号合路方法，所述方法利用上述数模广播信号合路装置，其具体包括：
模拟信号输入端口获取待发送的模拟广播信号及所述模拟广播信号所处的目标频段，将所述模拟广播信号发送至所述信号合路器，并将所述目标频段发送至所述数字信号激励器；
数字信号激励器生成处于所述目标频段中的数字广播信号，将所述数字广播信号发送至所述信号合路器；
信号合路器将所述模拟广播信号与数字广播信号进行合路处理，获得目标数模广播信号。
优选地，所述方法还包括：
数字信号激励器在生成数字广播信号后，将所述数字广播信号发送至功放调整系统；
功放调整系统还会获取所述模拟广播信号的功率，并检测所述数字广播信号的功率，并根据预设的功率比，对数字广播信号的功率进行调整，再功率调整后的数字广播信号发送至信号合路器。
本发明利用模拟信号输入端口获取待发送的模拟广播信号及所述模拟广播信号所处的目标频段，将所述模拟广播信号发送至所述信号合路器，并将所述目标频段发送至所述数字信号激励器；用数字信号激励器生成处于所述目标频段中的数字广播信号，将所述数字广播信号发送至所述信号合路器；用信号合路器将所述模拟广播信号和数字广播信号进行合路，获得目标数模信号。由于本发明通过在原模拟带宽内生成数字广播信号，并且原有模拟广播信号在信号合路过程中保持不变，使得原有广播系统照常运转，只需在原有设备上增加本发明装置即可升级到数字调频广播系统，从而降低了模拟广播数字化升级的成本。
附图说明
图1为本发明数模广播信号合路装置的第一实施例的结构框图；
图2为本发明数模广播信号合路装置的第二实施例的结构框图；
图3为图1所示的数模广播信号合路装置中信号合路器中定向耦合器的电路原理图；
图4为图1所述的数模广播信号合路装置中信号合路器的结构框图；
图5为图1所述的数模广播信号合路装置中数字信号激励器的结构框图；
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
参照图1，图1为本发明数模广播信号合路装置第一实施例的结构框图。其中，所述数模广播信号合路装置包括：模拟信号输入端口10、数字信号激励器20和信号合路器30；
所述模拟信号输入端口10，用于获取待发送的模拟广播信号，并获取所述模拟广播信号所在的电台频段信息，再将所述模拟广播信号传输至所述信号合路器；
所述数字信号激励器20，用于生成待发送的数字广播信号，并调用所述模拟广播信号所在的电台频段信息，将所述数字广播信号通过相同的电台频段传输至所述信号合路器；
所述信号合路器30，用于将所述待发送模拟广播信号和数字化信号进行合路，获得目标数模信号并输出。
需要说明的是，本发明实施例提出的数模广播信号合路装置的应用场景可以是广播播发系统，所述模拟信号输入端口10置于所述数模广播信号合路装置的FM信号激励器之后；在数模广播信号合路装置开启后会进行系统初始化操作，所述模拟信号输入端口10进行复位及输入（Input）接口初始化设置，然后所述数字信号激励器20会进行系统初始化设置，并等待数字广播信号生成功能的触发，在接收到触发信号（即模拟广播信号信号）时，通过两线式串行总线（Inter－Integrated Circuit，I2C）接收通信控制，所述通信控制包括：复位控制和/或数字广播信号生成控制等，此外，所述数字信号激励器20还会检测是否有停止数字广播信号生成的信号，在有停止信号时，结束数字广播信号生成操作。
在具体实现中，所述数模广播信号合路装置在接收到开机指令时，执行系统初始化操作之后，所述模拟信号输入端口10进行复位及输入（Input）接口初始化设置，然后所述数字信号激励器20会进行系统初始化设置，以使所述数字信号激励器20处于从设备状态。上述初始化过程完成后，所述模拟信号输入端10对FM信号激励器产生的模拟广播信号进行接收；当接收到模拟广播信号时，对所述数字信号激励器20进行通讯控制，以使所述数字信号激励器20进行数字广播信号生成和传输操作。
此外，所述模拟信号输入端口10还会对接收到的模拟广播信号进行检测，已检测所述模拟广播信号的目标频段，再将所述目标频段发送给所述数字信号激励器20，以使所述数字信号激励器20在目标频段内生成数字广播信号并发送至所述信号合路器30。
相应地，所述数字信号激励器20,在接受了数字广播信号生成控制后，通过数字音频信号（AES/EBU）或模拟音频信号调制生成数字广播信号，所述数字音频信号（AES/EBU）或模拟音频信号可以通过外部音频设备传输，也可以通过内部储存的音频来获得，本实施例对此不加以限制；如果是模拟音频信号经数模转换(A/D)成数字音频信号后，再进行下一步处理，如果是数字音频信号，则直接进行下一步处理；所述数字信号激励器20中的数字信号处理器（DSP）对所述数字音频信号进行调整、编码，所述数字音频信号再通过直接数字频率合成器（DDS）完成频率调制；最后数字调频信号通过数模转换（D/A）转换生成数字调频载波信号，即数字广播信号，在生成数字广播信号后，所述数字信号激励器20将所述数字广播信号发送至所述信号合路器30。
此外，所述数模广播信号合路装置于传统模拟广播系统的KW级功放系统之前，以使所述数模广播信号合路装置生成的数模广播信号可以通过原有的KW级功放系统功放，再由天线发射信号，因此不需要购买其他设备即能完成数模同播。
本实施例中，所述数字信号激励器20可通过数字音频信号（AES/EBU）或模拟音频信号调制生成数字广播信号，并将生成的数字广播信号传输至所述信号合路器30，此外本实施例中所述数模广播信号合路装置还包括为其内部各电子器件散热的散热系统和用于为装置供电的供电系统（图中未示出）。
本实施例中，模拟信号输入端口获取待发送的模拟广播信号及所述模拟广播信号所处的目标频段，将所述模拟广播信号发送至所述信号合路器，并将所述目标频段发送至所述数字信号激励器；用数字信号激励器生成处于所述目标频段中的数字广播信号，将所述数字广播信号发送至所述信号合路器；用信号合路器将所述模拟广播信号和数字广播信号进行合路，获得目标数模信号。本实施例中，由于数字信号激励器在原模拟带宽内生成数字广播信号，并且原有模拟广播信号在信号合路过程中保持不变，使得原有广播系统照常运转，无需添加或更改其他设备即可升级到数字调频广播，从而降低了模拟广播数字化升级的成本。
进一步地，如图2所述，基于第一实施例提出本发明数模广播信号合路装置的第二实施例，在本实施例中，所述装置还包括：
功率调整系统40，用于获取所述模拟广播信号的功率，并接收所述数字信号激励器20输出的数字广播信号，检测所述数字广播信号的功率，并根据预设的功率比，对所述数字广播信号的功率进行调整，再功率调整后的数字广播信号发送至信号合路器30。
需要说明的是，所述功率调整系统40在获取到所述数字信号激励器20的生成的数字广播信号，同时也会接受所述模拟广播信号，对所述数字广播信号和模拟广播信号的功率分别进行检测，根据所述两个信号的功率计算当前两信号的功率比，再将当前所述功率比与预设的数字广播信号和模拟广播信号的功率比进行比较，根据比较结果对数字信号的功率进行放大或者衰减，本实施例中所述预设两信号的功率比并不固定，可根据实际情况设置。
本实施例中，所述功率调整系统40包括一个或者一个以上的功放器，在本实施例中，所述功放器优选为数字功率放大器（即数字功放），用于根据功率比较的结果，对数字广播信号进行功率放大或者衰减，并将功率调整后的数字广播信号传输至信号合路器，
本实施例中，所述信号合路器30包括一个定向耦合器310，下面结合图3对所述定向耦合器310进行具体说明：
所述定向耦合器包括：互不相交的主信号线和耦合信号线，
所述主信号线，用于接收并传输所述模拟广播信号；所述耦合信号线，用于接收并传输所述数字广播信号，再将所述数字广播信号耦合至主信号线，优选地，以主信号线信号的一端作为输入端301，用于模拟广播信号的输入，再将模拟广播信号在主信号线上进行传输，以耦合信号线的一端作为隔离端302，所述隔离端302与主信号线上的输入端301不在同一侧，用于接收并传输数字广播信号，其传输方向与主信号线传输模拟广播信号的方向相反；所述数字广播信号在耦合信号线上传输至耦合端303，所述耦合端303与主信号线上的输入端301在同一侧，用于将数字广播信号耦合至主线，获得目标广播数模信号。
在具体实现中，如图3所示，定向耦合器优选为一种微带平行线的定向耦合器。优选地，其耦合度C为3dB,隔离度＞40dB。主信号线为一字形，耦合信号线为U字形，所述输入端301接收模拟广播信号，并通过主信号线正向传输，所述隔离端302接收数字广播信号，并通过耦合信号线反向传输至耦合端303，优选地，所述耦合端303，存在一个耦合电容，可以将数字信号耦合至主信号线，获得目标数模广播信号。
为实现对数字广播信号和模拟广播信号的耦合，本实例中的耦合端303处，主信号线和耦合信号线平行以形成耦合电容，此外，还接入了50Ohm负载以降低耦合时的信号干扰。当然，具体的负载数值的选择可以根据实际情况选择，本实施例对此不加以限制。
本实施例中，通过定向耦合器对模拟信号输入端获取的模拟广播信号和数字信号激励器生成的数字广播信号进行信号合路，获得数模广播信号,所述定向耦合器由两个互相隔离的端口接收模拟广播信号和数字广播信号，并且由耦合端303的耦合电容进行信号合路，从而在合路过程中有很高的隔离度，可以做到两信号互不影响。
进一步地，如图4所示，基于上述各实施例提出本发明数模广播信号合路装置的第三实施例，在本实施例中，所述信号合路器30还包括：
功率检测装置320，设于所述主信号线的输出端，用于对所述主信号线上的模拟广播信号和数字广播信号分别进行功率检测，将检测结果与预设功率比较，判断耦合后的所述模拟广播信号和数字广播是否有功率损耗；
功率调整单元330，用于接收信号损耗检测单元的检测结果，在所述模拟广播信号和数字广播信号在合路器中有功率损耗时，根据预设功率调整所述模拟广播信号和数字广播信号的功率。
需要说明的是，为提升数模广播信号质量，保证数模广播信号的正常播发。本实施例中经定向耦合器310耦合后的数模广播信号需要经功率检测装置320进行功率检测，再经功率调整单元330对数模广播信号进行功率调整，以使经过功率调整后的数模广播信号能在功率上与原有模拟广播系统的功率要求相互匹配。
在具体实现时，功率检测装置320可以根据原有模拟广播系统的功率要求预设数模广播信号的功率值以及数模广播信号中模拟广播信号和数字广播信号的功率比；所述定向耦合器310在对模拟广播信号和数字广播信号进行耦合处理后得到数模广播信号，将所述数模广播信号由主信号线传输至功率检测装置320，功率检测装置320根据所述预设功率值和功率比对所述数模广播信号进行检测，再将数模广播信号和检测结果传输给功率调整单元330；功率调整单元330在接收了数模广播信号和检测结果后，根据检测结果对数模广播信号进行调整；如果检测结果符合所述预设功率值和功率比，则所述功率调整单元330不进行任何操作；如果检测结果不符合所述预设功率值和功率比，则所述功率调整单元330将所述数模广播信号调整至预设功率值和功率比。
本实施例中，信号合路器30通过功率检测装置320和功率调整单元330对合路处理之后的数模广播信号进行功率检测和调整，提高了合路处理的稳定性，保证了数模广播信号的功率，使数模广播信号能够通过原有的模拟广播系统正常播发。
进一步地，如图5所示，基于上述各实施例提出本发明数模广播信号合路装置的第四实施例，在本实施例中，所述数字信号激励器20还包括：
所述数字信号生成单元，用于生成处于所述目标频段中的数字广播信号；
所述频谱仪，用于获取所述模拟广播信号的频谱分布，并检测所述数字广播信号在所述目标频段中的频谱分布，判断所述模拟广播信号和数字广播信号的频谱分布是否存在重合；
所述频率调整单元，用于当所述频谱分布存在重合时，对所述模拟广播信号的频谱分布进行调整，以使所述数字广播信号的频谱分布与所述模拟广播信号的频谱分布不重合；
所述频谱调整单元，还用于将调整后的数字广播信号发送至所述信号合路器。
需要说明的是，本实施例中的频谱仪201和频段调整单元202设置在所述数字信号激励器20的输出端口，在所述数字广播信号输出之前，所述频谱仪201会对所述数字广播信号的频谱分布检测，以判断所述数字广播信号是否在目标频段中，并且还会检测所述数字广播信号的频谱分布是否与模拟广播信号的频谱分布重合，并将检测结果发送给频段调整单元202；所述频段调整单元202会根据频谱仪201的检测结果对所述数字广播信号的频率进行调整。
在本实施例中，当所述频谱仪201检测到所述数字广播信号在目标频段中，并且与模拟广播信号的频谱分布不存在重合，频段调整单元202则不进行任何操作，当所述频谱仪201检测到所述数字广播信号不在目标频段中或存在与模拟广播信号的频谱分布重合的情况，频段调整单元将对所述数字广播信号的频率调整至目标频段中，且与模拟广播信号的频谱分布不重合，保证了，数字广播信号和模拟广播信号可以在同一频段内同时播发，并且降低两信号互相不影响。
此外，本发明还提供一种数模广播信号的合路方法，所述方法利用上述数模广播信号装置，所述数模广播信号装置在所述方法中的具体工作原理及应用可参照以上各实施例，此处不再赘述。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其它变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者系统不仅包括那些要素，而且还包括没有明确列出的其它要素，或者是还包括为这种过程、方法、物品或者系统所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者系统中还存在另外的相同要素。
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (15)

  1. 一种数模广播信号合路装置，其特征在于，所述装置包括：模拟信号输入端口、数字信号激励器和信号合路器；
    所述模拟信号输入端口，用于获取待发送的模拟广播信号及所述模拟广播信号所处的目标频段，将所述模拟广播信号发送至所述信号合路器，并将所述目标频段传输至所述数字信号激励器；
    所述数字信号激励器，用于生成处于所述目标频段中的数字广播信号，将所述数字广播信号传输至所述信号合路器；
    所述信号合路器，用于将所述模拟广播信号和数字广播信号进行合路，获得目标数模广播信号。
  2. 如权利要求1所述的装置，其特征在于，所述信号合路器包括定向耦合器；
    所述定向耦合器，用于分别接收所述模拟广播信号和数字广播信号，并对所述模拟广播信号和数字广播信号进行耦合，获得目标数模广播信号。
  3. 如权利要求2所述的装置，其特征在于，所述定向耦合器包括互不相交的主信号线和耦合信号线；
    所述主信号线，用于接收并传输所述模拟广播信号；
    所述耦合信号线，用于接收并传输所述数字广播信号，在传输所述数字广播信号时，将所述数字广播信号耦合至所述主信号线。
  4. 如权利要求2所述的装置，其特征在于，所述信号合路器还包括功率检测装置和功率调整单元；
    所述功率检测装置设于所述主信号线的输出端，用于对所述主信号线上的模拟广播信号和数字广播信号分别进行功率检测，将检测结果与预设功率比较，判断耦合后的所述模拟广播信号和数字广播是否有功率损耗；
    所述功率调整单元，用于根据信号损耗检测单元的检测结果，当所述模拟广播信号和数字广播信号在信号耦合后有功率损耗时，根据所述预设功率调整所述模拟广播信号和数字广播信号的功率。
  5. 如权利要求1所述的装置，其特征在于，所述数字信号激励器包括数字信号生成单元、频谱仪和频率调整单元；
    所述数字信号生成单元，用于生成处于所述目标频段中的数字广播信号；
    所述频谱仪，用于获取所述模拟广播信号的频谱分布，并检测所述数字广播信号在所述目标频段中的频谱分布，判断所述模拟广播信号和数字广播信号的频谱分布是否存在重合；
    所述频率调整单元，用于当所述频谱分布存在重合时，对所述模拟广播信号的频谱分布进行调整，以使所述数字广播信号的频谱分布与所述模拟广播信号的频谱分布不重合；
    所述频谱调整单元，还用于将调整后的数字广播信号发送至所述信号合路器。
  6. 如权利要求5所述的装置，其特征在于，所述数字信号激励器还包括：数字信号生成开关；
    所述数字信号生成开关，用于在所述模拟信号输入端口获取所述模拟广播信号时，向所述数字信号生成单元发送触发指令，以使所述数字广播信号生成单元在接收触发指令后生成处于所述目标频段中的数字广播信号。
  7. 如权利要求1所述的装置，其特征在于，所述装置还包括：设于所述数字信号激励器和信号合路器之间的功率调整系统；
    所述功率调整系统，用于获取所述模拟广播信号的功率，并接收所述数字信号激励器输出的数字广播信号，检测所述数字广播信号的功率，并根据预设的功率比，对所述数字广播信号的功率进行调整，再功率调整后的数字广播信号发送至信号合路器。
  8. 如权利要求2所述的装置，其特征在于，所述装置还包括：设于所述数字信号激励器和信号合路器之间的功率调整系统；
    所述功率调整系统，用于获取所述模拟广播信号的功率，并接收所述数字信号激励器输出的数字广播信号，检测所述数字广播信号的功率，并根据预设的功率比，对所述数字广播信号的功率进行调整，再功率调整后的数字广播信号发送至信号合路器。
  9. 如权利要求3所述的装置，其特征在于，所述装置还包括：设于所述数字信号激励器和信号合路器之间的功率调整系统；
    所述功率调整系统，用于获取所述模拟广播信号的功率，并接收所述数字信号激励器输出的数字广播信号，检测所述数字广播信号的功率，并根据预设的功率比，对所述数字广播信号的功率进行调整，再功率调整后的数字广播信号发送至信号合路器。
  10. 如权利要求4所述的装置，其特征在于，所述装置还包括：设于所述数字信号激励器和信号合路器之间的功率调整系统；
    所述功率调整系统，用于获取所述模拟广播信号的功率，并接收所述数字信号激励器输出的数字广播信号，检测所述数字广播信号的功率，并根据预设的功率比，对所述数字广播信号的功率进行调整，再功率调整后的数字广播信号发送至信号合路器。
  11. 如权利要求5所述的装置，其特征在于，所述装置还包括：设于所述数字信号激励器和信号合路器之间的功率调整系统；
    所述功率调整系统，用于获取所述模拟广播信号的功率，并接收所述数字信号激励器输出的数字广播信号，检测所述数字广播信号的功率，并根据预设的功率比，对所述数字广播信号的功率进行调整，再功率调整后的数字广播信号发送至信号合路器。
  12. 如权利要求6所述的装置，其特征在于，所述装置还包括：设于所述数字信号激励器和信号合路器之间的功率调整系统；
    所述功率调整系统，用于获取所述模拟广播信号的功率，并接收所述数字信号激励器输出的数字广播信号，检测所述数字广播信号的功率，并根据预设的功率比，对所述数字广播信号的功率进行调整，再功率调整后的数字广播信号发送至信号合路器。
  13. 如权利要求1所述的装置，其特征在于，所述数模广播信号合路装置还包括：设于所述数字信号激励器和信号合路器之间的散热器。
  14. 一种利用权利要求书1所述的数模广播信号合路装置的数模广播信号合路方法，其特征在于，所述方法包括以下步骤：
    模拟信号输入端口获取待发送的模拟广播信号及所述模拟广播信号所处的目标频段，将所述模拟广播信号发送至所述信号合路器，并将所述目标频段发送至所述数字信号激励器；
    数字信号激励器生成处于所述目标频段中的数字广播信号，将所述数字广播信号发送至所述信号合路器；
    信号合路器将所述模拟广播信号与数字广播信号进行合路处理，获得目标数模广播信号。
  15. 如权利要求14所述的方法，其特征在于，所述数字信号激励器生成处于所述目标频段中的数字广播信号，将所述数字广播信号发送至所述信号合路器，具体包括：
    数字信号激励器在生成数字广播信号后，将所述数字广播信号发送至功放调整系统；
    功放调整系统还会获取所述模拟广播信号的功率，并检测所述数字广播信号的功率，并根据预设的功率比，对数字广播信号的功率进行调整，再功率调整后的数字广播信号发送至信号合路器。
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