CN103281092B - A kind of modulating system and method realizing multi-mode intelligent soft base station - Google Patents
A kind of modulating system and method realizing multi-mode intelligent soft base station Download PDFInfo
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Abstract
The invention discloses a kind of modulating system and the method that realize multi-mode intelligent soft base station, this system at least comprises: communication modalities arranges module, arranges a kind of communication modalities for selecting in multiple communication modalities; Parameter configuration module, the communication modalities according to selecting carries out parameter configuration; Modulation module, the modulation of the communication modalities selected by realizing according to the parameter of configuration, obtains intermediate frequency and exports; Output module, export the modulated intermediate frequency signal that this modulation module obtains, the present invention can by the flexible loading of parameter and configuration on the basis of Unified frame, support the various modes modulation systems such as TETRA, GSM and LTE, not only increase the versatility of software, highly shortened the design cycle, and reduce design cost, decrease the complexity of later stage program maintenance.
Description
Technical field
The present invention, about a kind of modulating system and the method that realize multi-mode intelligent soft base station, particularly relates to a kind of modulating system and the method that realize multi-mode intelligent soft base station based on OFDM framework.
Background technology
In more than ten short years, mobile communication develops 2G/3G/4G three generations standard and more than 10 and plants standard system.Meanwhile, the network of multiple types is by long-term co-existence.For a long time, each equipment commercial city adopts the Design Mode of the corresponding a kind of base station of a kind of standard, and cause equipment kind polytypic to be mixed, organizational structures program is loaded down with trivial details, and technical support of equipment difficulty is large.Therefore, be necessary in fact to propose a kind of modulation technique realizing multi-mode intelligent soft base station, to solve the problem.
Summary of the invention
For overcoming the deficiency that above-mentioned prior art exists, the object of the present invention is to provide a kind of modulating system and the method that realize multi-mode intelligent soft base station, it can by the flexible loading of parameter and configuration on the basis of Unified frame, support TETRA (Trans-European Trunked Radio System, pan-European trunked radio), GSM (Global System for Mobile Communications, global system for mobile communications) and LTE (Long Term Evolution, Long Term Evolution) etc. various modes modulation system, not only increase the versatility of software, highly shortened the design cycle, and reduce design cost, decrease the complexity of later stage program maintenance.
For reaching above-mentioned and other object, the present invention proposes a kind of modulating system realizing multi-mode intelligent soft base station, and described modulating system realizes based on OFDM framework, at least comprises:
Communication modalities arranges module, arranges a kind of communication modalities for selecting in multiple communication modalities;
Parameter configuration module, communication modalities according to selecting carries out parameter configuration, wherein, described parameter configuration module comprises: clock signal configuration module, for configurable clock generator signal parameter, it comprises one or more crystal oscillator and n phase-locked loop, those crystal oscillators are supplied to this modulation module for generation of high accurate clock signal, this modulation module is according to the current communication modalities needing configuration, respectively to each phase-locked loop transmission frequency control command information, after each phase-locked loop receives FREQUENCY CONTROL order, lock and export corresponding frequency; I/Q sign map mode configures module, and for configuring I/Q sign map mode, it searches I/Q sign map table according to selecting the communication modalities arranged in I/Q sign map storehouse, and converts baseband signal to I signal, Q signal according to I/Q sign map table; Filter parameter configuration module, for configuring emission filter parameter according to the communication modalities selected;
Modulation module, the modulation of the communication modalities selected by realizing according to the parameter of configuration, obtain intermediate frequency to export, wherein, described modulation module comprises: clock process module, by the output of this clock signal configuration module by after frequency multiplication, scaling down processing, produce the information such as the clock signal needed for each communication modalities, frame signal and time slot signal; IFFT converts module, obtain this I/Q sign map mode configure module export I signal and Q signal after, deliver to filter module after respectively IFFT conversion is carried out to it; Filter module, the filter parameter according to obtaining selects corresponding emission filter to carry out filtering process to I signal, Q signal, and the I signal after filtering process, Q signal are delivered to up-conversion module; Up-conversion module, carries out Digital Up Convert process to I signal, Q signal, forms a digital medium-frequency signal; Digital-to-analogue conversion module, after digital medium-frequency signal is carried out digital-to-analogue conversion, obtains required intermediate frequency Modulation waveform;
Output module, exports the modulated intermediate frequency signal that this modulation module obtains.
Further, this up-conversion module is carried out Digital Up Convert process by the mode of inquiry sine table and cosine table obtain digital medium-frequency signal to I signal, Q signal.
Further, this modulation module utilizes FPGA hardware platform to realize.
Further, this multiple communication modalities comprises GSM, TETRA and LTE.
For reaching above-mentioned and other object, the present invention also provides a kind of modulator approach realizing multi-mode intelligent soft base station, and described modulator approach realizes based on OFDM framework, comprises the steps:
Step one, selects to arrange a kind of communication modalities in multiple communication modalities;
Step 2, the communication modalities according to selecting carries out parameter configuration, and this parameter configuration comprises the configuration of clock signal, the configuration of I/Q sign map mode and the configuration of emission filter parameter,
Wherein, the configuration of described I/Q sign map mode comprises the steps:
Communication modalities according to arranging searches I/Q sign map table in sign map storehouse;
Convert baseband signal to I signal according to I/Q sign map table, Q signal delivers to modulation module;
Step 3, the modulation of the communication modalities selected by realizing according to the parameter of configuration, obtains intermediate frequency and exports, comprise the steps: the I signal of acquisition, Q signal to carry out IFFT conversion respectively; Corresponding emission filter is selected to carry out filtering process to the I signal after IFFT conversion, Q signal according to the filter parameter obtained; I signal, Q signal after process are after filtering carried out Digital Up Convert process, obtains digital medium-frequency signal; This digital medium-frequency signal is carried out digital-to-analogue conversion, obtains required intermediate frequency Modulation waveform;
Step 4, exports the modulated intermediate frequency signal that modulation obtains.
Further, the configuration of this clock signal parameter comprises the steps:
After system power supply, crystal oscillator produces high accurate clock signal, is supplied to modulation module;
According to the current communication modalities needing configuration, modulation module is respectively to each phase-locked loop transmission frequency control command information;
After phase-locked loop receives FREQUENCY CONTROL order, lock and export corresponding frequency, delivering to modulation module;
After frequency multiplication, scaling down processing, produce the information such as the clock signal needed for each communication modalities, frame signal and time slot signal.
Compared with prior art, a kind of modulating system and method realizing multi-mode intelligent soft base station of the present invention, by selecting to arrange a kind of communication modalities in multiple communication modalities, communication modalities according to selecting carries out parameter configuration, and the modulation of communication modalities selected by realizing according to the parameter of configuration, obtain intermediate frequency to export, achieve and support TETRA by the flexible loading of parameter and configuration on the basis of Unified frame, the object of the various modes modulation systems such as GSM and LTE, the present invention not only increases the versatility of software, highly shortened the design cycle, and reduce design cost, decrease the complexity of later stage program maintenance.
Accompanying drawing explanation
Fig. 1 is a kind of system architecture diagram realizing the modulating system of multi-mode intelligent soft base station of the present invention;
Fig. 2 is that in present pre-ferred embodiments, each mode clock signal produces schematic diagram;
Fig. 3 is the schematic diagram of modulating part in present pre-ferred embodiments;
Fig. 4 is emission filter design diagram in present pre-ferred embodiments;
Fig. 5 is a kind of flow chart of steps realizing the modulator approach of multi-mode intelligent soft base station of the present invention;
Fig. 6 is the thin portion flow chart of steps of step 503 in present pre-ferred embodiments.
Embodiment
Below by way of specific instantiation and accompanying drawings embodiments of the present invention, those skilled in the art can understand other advantage of the present invention and effect easily by content disclosed in the present specification.The present invention is also implemented by other different instantiation or is applied, and the every details in this specification also can based on different viewpoints and application, carries out various modification and change not deviating under spirit of the present invention.
Fig. 1 is a kind of system architecture diagram realizing the modulating system of multi-mode intelligent soft base station of the present invention.In present pre-ferred embodiments, the modulating system realizing multi-mode intelligent soft base station of the present invention realizes based on OFDM framework, as shown in Figure 1, this modulating system comprises: communication modalities arranges module 10, parameter configuration module 11, modulation module 12 and output module 13.
Wherein communication modalities arranges module 10 and arranges a kind of communication modalities for selecting in multiple communication modalities, in present pre-ferred embodiments, communication modalities arranges module 10 can arrange a kind of communication modalities in multiple communication modalities as selected in GSM, TETRA, LTE etc.; Parameter configuration module 11 carries out parameter configuration according to the communication modalities selected, and parameter configuration here comprises the configuration of clock signal (clk), the configuration of I/Q sign map mode and the configuration of emission filter parameter; Modulation module 12, the modulation of the communication modalities selected by realizing according to the parameter of configuration, obtain intermediate frequency and export, in present pre-ferred embodiments, modulation module 12 realizes on FPGA hardware platform; Output module 13 exports the modulated intermediate frequency signal that modulation module obtains.
Specifically, parameter configuration module 11 comprises clock signal configuration module 110, I/Q sign map mode configures module 111 and filter parameter configuration module 112.Modulation module 12 comprises clock process module 120, IFFT converts module 121, filter module 122, up-conversion module 123 and digital-to-analogue conversion module 124 (D/A).Each module will be introduced further below.
Fig. 2 is that in present pre-ferred embodiments, each mode clock signal produces schematic diagram.As shown in Figure 2, clock signal configuration module 110 comprises one or more crystal oscillator and n phase-locked loop pll 1-PLLn (PhaseLocked Loop, PLL), wherein crystal oscillator is supplied to modulation module 12 (FPGA) for generation of high accurate clock signal, modulation module 12 (FPGA) is according to the current communication modalities needing configuration, respectively to each PLL transmission frequency control command information (clock signal), after each PLL module receives FREQUENCY CONTROL order, lock and export corresponding frequency, deliver to modulation module 12 (FPGA), the clock processing module 120 of modulation module 12 (FPGA) passes through frequency multiplication, after the process such as frequency division, produce the clock signal needed for each communication modalities, the information such as frame signal and time slot signal.
Fig. 3 is the schematic diagram of modulating part in present pre-ferred embodiments.As shown in Figure 3, I/Q sign map mode configuration module 111 searches I/Q sign map table according to selecting the communication modalities arranged in I/Q sign map storehouse, and convert baseband signal to I signal according to I/Q sign map table, Q signal delivers to modulation module 12, in present pre-ferred embodiments, mainly comprise the mapping modes such as GMSK, pi/4DQPSK, QPSK, 4QAM, 16QAM, 64QAM.The IFFT of modulation module 12 converts after module 121 obtains I signal I (n) and Q signal Q (n), IFFT (Inverse Fast Fourier Transform is carried out respectively to it, inverse fast Fourier transform) conversion, in present pre-ferred embodiments, employ the FFT ip Core in FPGA, because these ip Core input and output are serial, so without the need to carrying out serioparallel exchange and parallel-serial conversion process when realizing, I signal after IFFT conversion, Q signal is sent to filter module 122, filter module 122 selects corresponding emission filter to I signal according to the filter parameter obtained, Q signal carries out filtering process, by the I signal after filtering process, Q signal delivers to up-conversion module 123, up-conversion module 123 is to I signal, Q signal carries out Digital Up Convert process, form a digital medium-frequency signal, in present pre-ferred embodiments, up-conversion module 123 is by (sine table of tabling look-up, cosine table) mode is to I signal, Q signal carries out Digital Up Convert process and obtains digital medium-frequency signal, after digital medium-frequency signal is carried out digital-to-analogue conversion by digital-to-analogue conversion module 124, obtain required intermediate frequency Modulation waveform.
Fig. 4 is emission filter design diagram in present pre-ferred embodiments.In order to effectively eliminate intersymbol interference and frequency spectrum diffusion, signal needs device filtering process after filtering after being converted by IFFT.But emission filter type corresponding to different communication systems is different, as GSM mode use Gaussian filter, TETRA pattern uses root raised cosine filter, LTE pattern uses windowing raised cosine filter, but all can be realized by digital filter.Under the condition that emission filter program is the same, only the requirement that different filter coefficients can reach different mode need be set.
Fig. 5 is a kind of flow chart of steps realizing the modulator approach of multi-mode intelligent soft base station of the present invention.In present pre-ferred embodiments, the modulator approach realizing multi-mode intelligent soft base station of the present invention realizes based on OFDM framework.As shown in Figure 5, a kind of modulator approach realizing multi-mode intelligent soft base station of the present invention, comprises the steps:
Step 501, selects to arrange a kind of communication modalities in multiple communication modalities;
Step 502, the communication modalities according to selecting carries out parameter configuration, and parameter configuration here comprises the configuration of clock signal (clk), the configuration of I/Q sign map mode and the configuration of emission filter parameter;
Step 503, the modulation of the communication modalities selected by realizing according to the parameter of configuration, obtains intermediate frequency and exports;
Step 504, exports the modulated intermediate frequency signal that modulation obtains.
In step 502, the configuration of clock signal parameter comprises the steps:
After step 1.1. system power supply, crystal oscillator produces high accurate clock signal, is supplied to FPGA system;
Step 1.2 is according to the current communication modalities needing configuration, and modulation module is respectively to each PLL module transmission frequency control command information (clock signal);
Step 1.3, after PLL module receives FREQUENCY CONTROL order, locks and exports corresponding frequency, delivering to modulation module;
Step 1.4. modulation module, by after the process such as frequency multiplication, frequency division, produces the information such as the clock signal needed for each communication modalities, frame signal and time slot signal.
In step 502, the configuration of I/Q sign map mode comprises the steps:
Step 2.1, the communication modalities according to arranging searches I/Q sign map table in sign map storehouse, in present pre-ferred embodiments, mainly comprises the mapping modes such as GMSK, pi/4DQPSK, QPSK, 4QAM, 16QAM, 64QAM;
Step 2.2, converts baseband signal to I signal according to I/Q sign map table, Q signal delivers to modulation module.
Fig. 6 is the thin portion flow chart of steps of step 503 in present pre-ferred embodiments.As shown in Figure 6, step 503 comprises the steps: further
Step 601, the I signal of acquisition, Q signal are carried out respectively IFFT (Inverse Fast FourierTransform, inverse fast Fourier transform) conversion, in present pre-ferred embodiments, employ the FFT ip Core in FPGA, because these ip Core input and output are serial, so without the need to carrying out serioparallel exchange and parallel-serial conversion process when realizing;
Step 602, carries out filtering process by the I signal after IFFT conversion, Q signal through emission filter, it should be noted that, the emission filter here for filtering need carry out corresponding selection according to the filter parameter obtained;
Step 603, I signal, Q signal after process are after filtering carried out Digital Up Convert process, obtain digital medium-frequency signal, in present pre-ferred embodiments, by (sine table, cosine table) mode of tabling look-up, Digital Up Convert process is carried out to I signal, Q signal;
Step 604, carries out digital-to-analogue conversion by digital medium-frequency signal, obtains required intermediate frequency Modulation waveform.
In sum, a kind of modulating system and method realizing multi-mode intelligent soft base station of the present invention, by selecting to arrange a kind of communication modalities in multiple communication modalities, communication modalities according to selecting carries out parameter configuration, and the modulation of communication modalities selected by realizing according to the parameter of configuration, obtain intermediate frequency to export, achieve and support TETRA by the flexible loading of parameter and configuration on the basis of Unified frame, the object of the various modes modulation systems such as GSM and LTE, the present invention not only increases the versatility of software, highly shortened the design cycle, and reduce design cost, decrease the complexity of later stage program maintenance.
Compared with prior art, tool of the present invention has the following advantages:
(1) the present invention is based on the multiple modalities modulation system that software and radio technique achieves unified shader on the same hardware platform, the complexity enhance the versatility of software, shortening the design cycle greatly, reduce design cost, alleviate later stage system maintenance.
(2) the present invention only needs simple parameter configuration, can realize different modulation systems, also for third-party use and exploitation provide convenient, is highly suitable for the user demand of various communication system physical layer modulation module.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any those skilled in the art all without prejudice under spirit of the present invention and category, can carry out modifying to above-described embodiment and change.Therefore, the scope of the present invention, should listed by claims.
Claims (6)
1. realize a modulating system for multi-mode intelligent soft base station, described modulating system realizes based on OFDM framework, at least comprises:
Communication modalities arranges module, arranges a kind of communication modalities for selecting in multiple communication modalities;
Parameter configuration module, the communication modalities according to selecting carries out parameter configuration, and wherein, described parameter configuration module comprises:
Clock signal configuration module, for configurable clock generator signal parameter, it comprises one or more crystal oscillator and n phase-locked loop, described crystal oscillator is supplied to this modulation module for generation of high accurate clock signal, this modulation module is according to the current communication modalities needing configuration, respectively to each phase-locked loop transmission frequency control command information, after each phase-locked loop receives FREQUENCY CONTROL order, lock and export corresponding frequency;
I/Q sign map mode configures module, and for configuring I/Q sign map mode, it searches I/Q sign map table according to selecting the communication modalities arranged in I/Q sign map storehouse, and converts baseband signal to I signal, Q signal according to I/Q sign map table;
Filter parameter configuration module, for configuring emission filter parameter according to the communication modalities selected;
Modulation module, the modulation of the communication modalities selected by realizing according to the parameter of configuration, obtain intermediate frequency and export, wherein, described modulation module comprises:
Clock process module, by the output of this clock signal configuration module by after frequency multiplication, scaling down processing, produces the clock signal needed for each communication modalities, frame signal and time slot signal information;
IFFT converts module, obtain this I/Q sign map mode configure module export I signal and Q signal after, deliver to filter module after respectively IFFT conversion is carried out to it;
Filter module, the filter parameter according to obtaining selects corresponding emission filter to carry out filtering process to I signal, Q signal, and the I signal after filtering process, Q signal are delivered to up-conversion module;
Up-conversion module, carries out Digital Up Convert process to I signal, Q signal, forms a digital medium-frequency signal; And
Digital-to-analogue conversion module, after digital medium-frequency signal is carried out digital-to-analogue conversion, obtains required intermediate frequency Modulation waveform;
Output module, exports the modulated intermediate frequency signal that this modulation module obtains.
2. a kind of modulating system realizing multi-mode intelligent soft base station as claimed in claim 1, is characterized in that: this up-conversion module is carried out Digital Up Convert process by the mode of inquiry sine table and cosine table obtain digital medium-frequency signal to I signal, Q signal.
3. a kind of modulating system realizing multi-mode intelligent soft base station as claimed in claim 1, is characterized in that: this modulation module utilizes FPGA hardware platform to realize.
4. a kind of modulating system realizing multi-mode intelligent soft base station as claimed in claim 1, is characterized in that: this multiple communication modalities comprises GSM, TETRA and LTE.
5. realize a modulator approach for multi-mode intelligent soft base station, described modulator approach realizes based on OFDM framework, comprises the steps:
Step one, selects to arrange a kind of communication modalities in multiple communication modalities;
Step 2, the communication modalities according to selecting carries out parameter configuration, and this parameter configuration comprises the configuration of clock signal, the configuration of I/Q sign map mode and the configuration of emission filter parameter,
Wherein, the configuration of described I/Q sign map mode comprises the steps:
Communication modalities according to arranging searches I/Q sign map table in sign map storehouse;
Convert baseband signal to I signal according to I/Q sign map table, Q signal delivers to modulation module;
Step 3, the modulation of the communication modalities selected by realizing according to the parameter of configuration, obtains intermediate frequency and exports, comprise the steps:
The I signal of acquisition, Q signal are carried out IFFT conversion respectively;
Corresponding emission filter is selected to carry out filtering process to the I signal after IFFT conversion, Q signal according to the filter parameter obtained;
I signal, Q signal after process are after filtering carried out Digital Up Convert process, obtains digital medium-frequency signal;
This digital medium-frequency signal is carried out digital-to-analogue conversion, obtains required intermediate frequency Modulation waveform;
Step 4, exports the modulated intermediate frequency signal that modulation obtains.
6. a kind of modulator approach realizing multi-mode intelligent soft base station as claimed in claim 5, it is characterized in that, the configuration of this clock signal parameter comprises the steps:
After system power supply, crystal oscillator produces high accurate clock signal, is supplied to modulation module;
According to the current communication modalities needing configuration, modulation module is respectively to each phase-locked loop transmission frequency control command information;
After phase-locked loop receives FREQUENCY CONTROL order, lock and export corresponding frequency, delivering to modulation module;
After frequency multiplication, scaling down processing, produce the clock signal needed for each communication modalities, frame signal and time slot signal information.
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| CN105432139B (en) * | 2013-12-05 | 2019-01-08 | 华为技术有限公司 | A kind of base station and its method of managing software |
| CN106664748B (en) * | 2015-05-29 | 2019-11-29 | 华为技术有限公司 | Base-band software management method, wireless access system, base band device and BTS management platform |
| CN107318094B (en) * | 2016-04-27 | 2020-10-09 | 成都鼎桥通信技术有限公司 | Network intercommunication method and terminal based on cluster communication system |
| CN114915527B (en) * | 2022-04-26 | 2023-05-12 | 大尧信息科技(湖南)有限公司 | Mixed modulation signal synthesis method and generator based on software reconfiguration |
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