CN100375395C - CDMA mobile communication system pilot transmitter - Google Patents
CDMA mobile communication system pilot transmitter Download PDFInfo
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- CN100375395C CN100375395C CNB2004100701671A CN200410070167A CN100375395C CN 100375395 C CN100375395 C CN 100375395C CN B2004100701671 A CNB2004100701671 A CN B2004100701671A CN 200410070167 A CN200410070167 A CN 200410070167A CN 100375395 C CN100375395 C CN 100375395C
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Abstract
The present invention discloses a pilot frequency transmitter of a CDMA mobile communication system, which belongs to the field of mobile communication. The pilot frequency transmitter of the CDMA mobile communication system comprises a control module (11), a digital module (12), a radio frequency module (13) and a power supply module (14), wherein the control module (11) completes the configuration, the communication and the control of the modules; the control background (1102) realizes a man-machine dialog; the digital module (12) completes the signal processing of base band I/Q data; the radio frequency module (13) mainly completes the functions of modulation, power amplification and filtering of a simulation I/Q signal which is output by the digital module (12); the output frequency of a system is arranged by the radio frequency local oscillator (1304). The present invention has the advantages of small volume, light weight and portability; various base band configuration signals can be downloaded by a complete background operation interface; output power is automatically detected accurately at real time; transmitted frequency and power are displayed on a display screen in due time.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of emitter of CDMA mobile communication system pilot signal.
Background technology
Mobile communication system has become indispensable important component part in the every field such as production, life day by day, and not only convenient people's interchange is more linked up cost, improve the quality of living etc. the aspect is profoundly being promoted the change of society from reducing.Along with variation and deepization that people require for mobile communication, mobile communication technology is also fast-developing thereupon.When mobile communication system was carried out the network planning, the base station that needs to measure the specific region covered, and the main method of measurement is to launch pilot signal with emitter, detects this pilot signal with receiving system then, and the base station of measuring the specific region whereby covers.Currently used emitter generally is the signal generating Instrument and the power amplifier of specialty, produces pilot signal by signal generating Instrument, connects power amplifier then and launches pilot signal.But in actual applications, there is very big shortcoming in this scheme: at first, whole pilot transmission system comprises such as a lot of equipment such as power supply, power amplifier, professional signal generating Instruments, exist volume big, connect inherent shortcomings such as loaded down with trivial details, complicated operation, inconvenience carry; And the signal generating Instrument of specialty costs an arm and a leg at present, covers for the base station that needs large tracts of land to conduct a field operation and measures, and seems very uneconomical; In addition, in order accurately to measure the cell coverage area of calculation base station, must know the transmitting power of pilot frequency emitting set, promptly require to detect the size of power output in good time, thereby requiring again increases a power measuring, has increased the complexity and the cost of system more.
Summary of the invention
The objective of the invention is to overcome that the volume that existing CDMA mobile communication system pilot transmitter device exists is big, complicated operation, carry difficulty, shortcoming with high costs, in the hope of a kind of easy and simple to handle, compact conformation and code division multiple access mobile communcations system pilot transmission machine with low cost are provided.
For achieving the above object, the present invention has constructed a kind of CDMA mobile telecommunication transmitter, it is characterized in that, comprises modules such as control module, digital module, radio-frequency module and power module;
Described control module mainly comprises microcontroller MCU and control backstage, and the control backstage can be portable hand held computer or special keyboard/display system, and control module is mainly finished each modules configured, communication and control, realizes human-computer dialogue;
Described digital module mainly comprises I/Q memory, I/Q data buffer, filter and clock generator and D/A (D/A) etc.; Mainly finish the signal processing of baseband I/Q data, realize the signal storage of baseband I/Q data, the whole flow process that reads, realize that the molding filtration of signal is handled and digital-to-analogue conversion; Also finish Generation of Clock Signal and distribution simultaneously;
Described radio-frequency module major function is to finish the modulation of the Simulation with I/Q signal of digital module output, power amplification and filter function and system's output frequency is set by radio-frequency (RF) local oscillator; Simultaneously radio-frequency module by the pad value of control module control numerical-control attenuator, can be controlled the power output of pilot transmitter flexibly on the basis of realizing basic radio frequency processing function, thereby provides various possible power parameter values for test; Also design a coupler and power-sensing circuit at radio-frequency module in addition, can finish the coupling and the power detection of radiofrequency signal amplified signal, realized the in good time test and the control of power output.
CDMA mobile communication system pilot transmitter volume of the present invention is little, and light weight is easy to carry, is convenient to the multiple spot operation.Multiple functional, easy to operate, can download various base band configuration signal by complete consistency operation interface, comprise pilot signal and other baseband signals of cdma system and 3G (third generation mobile system), but the frequency and the power of flexible configuration output simultaneously.Moreover, the watt level that transmitter of the present invention also can accurately be tested oneself in good time and be exported is on the computer that the frequency and the power of emission in time can be shown in backstage control or the display screen of pilot transmitter.
Description of drawings
Fig. 1 is a CDMA mobile communication system pilot transmitter structured flowchart of the present invention.
Fig. 2 is a radio-frequency module structure chart in the transmitter of the present invention.
Fig. 3 is broadband CDMA system (WCDMA) the pilot transmitter structure chart as the specific embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing device of the present invention is further described in detail.
Fig. 1 has illustrated the systemic-function of CDMA mobile communication system pilot transmitter of the present invention.As can be seen from Figure 1, device of the present invention comprises 4 basic functions modules: control module 11, digital module 12, radio-frequency module 13, power module 14.Control module 11 mainly is made up of microcontroller MCU1101 and control backstage 1102, control backstage 1102 can be portable hand held computer or special keyboard/display system, control module 11 is mainly finished each modules configured, communication and control, realizes human-computer dialogue.Digital module 12 mainly contains compositions such as I/Q memory 1203, I/Q data buffer 1204, filter 1205 and clock generator 1202 and D/A (D/A) 1206.Mainly finish the signal processing of baseband I/Q data, realize the signal storage of baseband I/Q data, the whole flow process that reads, realize that the molding filtration of signal is handled and digital-to-analogue conversion; Also finish Generation of Clock Signal and distribution simultaneously.Radio-frequency module 13 major functions are to finish the modulation of the Simulation with I/Q signal of digital module output, power amplification and filter function and system's output frequency is set by radio-frequency (RF) local oscillator 1304; Radio-frequency module 13 is on the basis of realizing basic radio frequency processing function simultaneously, the present invention has further developed power control and measuring ability (seeing shown in Figure 2), pad value by control module 11 control numerical-control attenuators 2301, can control the power output of pilot transmitter flexibly, thereby provide various possible power parameter values for test; Also design a coupler 2302 and power-sensing circuit 2303 at radio-frequency module 13 in addition, can finish the coupling and the power detection of radiofrequency signal amplified signal, realized the in good time test and the control of power output.
Is that example is introduced this WCDMA pilot signal transmission machine in detail below in conjunction with accompanying drawing 3 with the WCDMA system.
WCDMA pilot transmitter shown in Figure 3 is divided into 4 modules according to function, introduces the function of each module below in detail.
Control module: comprise MCU1101 and control backstage 1102.MCU1101 finishes the detection of whole system and control; The function of man-machine interaction is finished on control backstage 1102, promptly can be by control backstage 1102 to the MCU1101 transmitting control commands, finish various operations by MCU1101, simultaneously the MCU1101 result that operating state, warning message, system configuration and the power of each module can be tested oneself sends it back control backstage 1102 and shows.Can there be 2 kinds of selection modes on control backstage 1102, a kind of is portable hand held computer, control interface, backstage by moving on the laptop computer to the MCU1101 transmitting control commands, can also be downloaded the I/Q data file of WCDMA pilot signal by serial ports or network interface from computer to pilot transmitter under this mode; Another kind is by keyboard on the pilot transmitter panel and display system, and to the MCU1101 transmitting control commands, after the I/Q data file was downloaded, this equipment can be controlled in this way; When laptop computer (PC) conduct control backstage 1102, this device can be operated under 2 kinds of mode of operations, and a kind of is downloading mode, and another kind is an emission mode.When being operated in downloading mode, download the I/Q data file to this pilot transmitter from PC; Under emission mode, PC can directly start the power amplifier 1302 of pilot transmitter, and the pilot signal transmission of having downloaded is gone out;
Digital module: digital module is finished the processing to the base-band digital i/q signal, digital module 12 also comprises bus switch unit 3201, address generator 1201, clock generator 1202, first digital filter 3210, second digital filter 3211, I/Q memory 1203 further comprises I memory 3204 and Q memory 3205, I/Q data buffer 1204 further comprises an I data buffer 3207, the one Q data buffer 3206, the 2nd I data buffer 3209, the 2nd Q data buffer 3208, D/A 1206 further comprise first D/A converter 3212 and second D/A converter 3213;
When control module 11 works in downloading mode, microcontroller 1101 sends the sig1 signal to bus switch unit 3201, the address signal of microcontroller 1101 is switched on the address bus of I memory 3204 and Q memory 3205, microcontroller 1101 sends the sig3 signal to bus switch unit 3201 simultaneously, open an I data buffer 3207 and a Q data buffer 3206, close the 2nd I data buffer 3209 and the 2nd Q data buffer 3208, make the data bus signal of microcontroller 1101 deliver to the data/address bus of I memory 3204 and Q memory 3205; Microcontroller 1101 can carry out read/write operation to I memory 3204 and Q memory 3205 then, and the data file on the control module 11 is write into I/Q memory 1203, finishes downloading process;
After the downloading mode of control module 11 is finished, continue to operate in emission mode, microcontroller 1101 sends the sig1 signal to bus switch unit 3201, the address signal of address generator 1201 is switched on the address bus of I memory 3204 and Q memory 3205, microcontroller 1101 sends the sig3 signal to bus switch unit 3201 simultaneously, open the 2nd I data buffer 3209 and the 2nd Q data buffer 3208, close an I data buffer 3207 and a Q data buffer 3206, make I memory 3204, the data/address bus of the data bus signal of Q memory 3205 and microcontroller 1101 is isolated, the address signal of address generator 1201 is read the data of I memory 3204 and Q memory 3205 then, by the 2nd I data buffer 3209, the 2nd Q data buffer 3208, deliver to first digital filter 3210, the input of second digital filter 3211, finish digital molding filtration, first D/A converter 3212 and second D/A converter 3213 are delivered in output; Clock generator 1202 generation system all clocks of other unit.
MUX3201, address generator 1201, clock generator 1202, I data buffer 3207, Q data buffer 3206, I data buffer 3209, Q data buffer 3208, digital filter 3210 and digital filter 3211 can use FPGA (field programmable gate array) to realize.
The address that address generator 1201 produces is with the big partial circulating of 1 frame data, is about to I memory 3204, Q memory 3205 and repeats to read from 0 address since 0 address to producing the address again after the last data of 1 frame run through, and circulation constantly.First digital filter 3210, second digital filter 3211 adopt root raised cosine limited impact response interpolating digital filter, and input data rate 3.84MCPS, 4 times of interpolations are output as 15.36MCPS.
Radio-frequency module: comprise I/Q modulator 1303, radio-frequency (RF) local oscillator 1304, numerical-control attenuator 2301, power amplifier 1302, filter 1301, coupler 2302, antenna 3406 and power-sensing circuit 2303; The Simulation with I that first D/A (D/A) converter 3212, second D/A (D/A) converter 3213 are sent here/Q baseband signal is through I/Q modulator 1303, directly be modulated to radio frequency, through numerical-control attenuator 2301, power amplifier 1302, filter 1301, launch through antenna 3406; Sending into power-sensing circuit 2303 rate of doing works at the output of filter 1301 by coupler 2302 coupling unit energy detects, MCU1101 can calculate the power output of equipment according to the test value of power-sensing circuit 2303, is presented on the computer or the display screen on the pilot transmitter panel of backstage control in good time; Pad value by the keyboard tunable integers controlling attenuation device 2301 on consistency operation interface or the pilot transmitter panel, the emission power output that obtains requiring, simultaneously MCU1101 can also carry out frequency configuration to the phase-locked loop circuit of radio-frequency (RF) local oscillator 1304 by the keyboard on consistency operation interface or the pilot transmitter panel, the output of control frequency flexibly, and the frequency that disposes is presented in good time on the computer or the display screen on the pilot transmitter panel of backstage control.
Power module: the power supply of each module is provided.
Above execution mode is to be that the function that example is introduced pilot transmitter is in detail implemented with the WCDMA system, if be used for other code division multiple access systems, the design of digital module and radio-frequency module will be adjusted accordingly.Parameter setting in digital module part digital filter 3210, digital filter 3211 will be done corresponding the adjustment according to system requirements, and the timing parameter of clock generator 1202 also will be done corresponding change; The frequency of the radio-frequency (RF) local oscillator 1304 of radio-frequency module part also will be adjusted accordingly according to the frequency requirement of each system, and also the difference because of system index is different for the parameter of power amplifier 1302, filter 1301 simultaneously.
Claims (8)
1. a CDMA mobile communication system pilot transmitter is characterized in that, comprises control module (11), digital module (12), radio-frequency module (13), power module (14);
Described control module (11) mainly comprises microcontroller (1101) and control backstage (1102), and described microcontroller (1101) is finished each modules configured, communication and control, and human-computer dialogue is realized on described control backstage (1102);
Described digital module (12) mainly comprises I/Q memory (1203), I/Q data buffer (1204), filter (1205), clock generator (1202) and D/A (1206), finish the signal processing of baseband I/Q data, realize the signal storage of baseband I/Q data, the whole flow process that reads, realize the molding filtration processing and the digital-to-analogue conversion of signal simultaneously, and Generation of Clock Signal and distribution;
Described radio-frequency module (13) comprises filter (1301), power amplifier (1302), I/O modulator (1303) and radio-frequency (RF) local oscillator (1304), mainly finish modulation, power amplification and the filter function of the Simulation with I/Q signal of described digital module (12) output, also system's output frequency is set by described radio-frequency (RF) local oscillator (1304).
2. CDMA mobile communication system pilot transmitter according to claim 1 is characterized in that, described control backstage (1102) is by portable hand held computer or special keyboard/display system structure.
3. CDMA mobile communication system pilot transmitter according to claim 2, it is characterized in that, when portable hand held computer is adopted on described control backstage (1102), can be operated in two kinds of patterns of downloading mode and emission mode: when being operated in downloading mode, download the I/Q data file to CDMA mobile communication system pilot transmitter from described portable hand held computer; When being operated in emission mode, described portable hand held computer directly starts the power amplifier (1302) of CDMA mobile communication system pilot transmitter, and the pilot signal transmission of having downloaded is gone out.
4. CDMA mobile communication system pilot transmitter according to claim 1, it is characterized in that described radio-frequency module (13) also comprises I/Q modulator (1303), radio-frequency (RF) local oscillator (1304), numerical-control attenuator (2301), power amplifier (1302), filter (1301), coupler (2302), antenna (3406) and power-sensing circuit (2303); The Simulation with I that described digital module (12) is sent here/Q baseband signal, is launched by described antenna (3406) through described numerical-control attenuator (2301), power amplifier (1302) and filter (1301) through described I/Q modulator (1303); Sending into described power-sensing circuit (2303) rate of doing work at the output of described filter (1301) by described coupler (2307) coupling unit energy detects, described microcontroller (1101) calculates the power output of equipment according to the test value of described power-sensing circuit (2303), is presented on the described control backstage (1102) in good time; Adjust the pad value of described numerical-control attenuator (2303) by the keyboard on the described control backstage (1102), the emission power output that obtains requiring, simultaneously described microcontroller (1101) also carries out frequency configuration by described control backstage (1102) to the phase-locked loop circuit of described radio-frequency (RF) local oscillator (1304).
5. CDMA mobile communication system pilot transmitter according to claim 1, it is characterized in that, described digital module (12) also comprises bus switch unit (3201), address generator (1201), clock generator (1202), first digital filter (3210), second digital filter (3211), described I/Q memory (1203) further comprises I memory (3204) and Q memory (3205), described I/Q data buffer (1204) further comprises an I data buffer (3207), the one Q data buffer (3206), the 2nd I data buffer (3209), the 2nd Q data buffer (3208), described D/A (1206) further comprise first D/A converter (3212) and second D/A converter (3213);
In described control module (11) when working in downloading mode, described microcontroller (1101) sends the sig1 signal to described bus switch unit (3201), the address signal of described microcontroller (1101) is switched on the address bus of described I memory (3204) and described Q memory (3205), described microcontroller (1101) sends the sig3 signal to described bus switch unit (3201) simultaneously, open a described I data buffer (3207) and a Q data buffer (3206), close described the 2nd I data buffer (3209) and the 2nd Q data buffer (3208), make the data bus signal of described microcontroller (1101) deliver to the data/address bus of described I memory (3204) and Q memory (3205); Described then microcontroller (1101) can carry out read/write operation to described I memory (3204) and Q memory (3205), and the data file on the described control module (11) is write into described I/Q memory (1203), finishes downloading process.
6. CDMA mobile communication system pilot transmitter according to claim 5, it is characterized in that described bus switch unit (3201), address generator (1201), clock generator (1202), an I data buffer (3207), a Q data buffer (3206), the 2nd I data buffer (3209), the 2nd Q data buffer (3208), first digital filter (3210) and second digital filter (3211) are realized by field programmable gate array.
7. CDMA mobile communication system pilot transmitter according to claim 5, it is characterized in that, the address that described address generator (3202) produces is with the big partial circulating of 1 frame data, be about to described I memory (3204), Q memory (3205) and repeat to read from 0 address since 0 address to producing the address again after the last data of 1 frame run through, circulation constantly.
8. CDMA mobile communication system pilot transmitter according to claim 5, it is characterized in that, described first digital filter (3210), second digital filter (3211) adopt root raised cosine limited impact response interpolating digital filter, input data rate 3.84MCPS, 4 times of interpolations are output as 15.36MCPS.
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| CNB2004100701671A CN100375395C (en) | 2004-08-04 | 2004-08-04 | CDMA mobile communication system pilot transmitter |
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| CNB2004100701671A CN100375395C (en) | 2004-08-04 | 2004-08-04 | CDMA mobile communication system pilot transmitter |
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| CN100375395C true CN100375395C (en) | 2008-03-12 |
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| CN101047334B (en) * | 2006-03-31 | 2010-10-13 | 深圳市朗科科技股份有限公司 | Common power supply anti-interference power supply method and circuit for hand transmitting equipment |
| CN107819527B (en) * | 2016-09-12 | 2020-10-13 | ***通信有限公司研究院 | Testing device and testing method for large-scale antenna base station equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237839A (en) * | 1998-03-10 | 1999-12-08 | 松下电器产业株式会社 | CDMA transmission apparatus |
| WO2003103326A1 (en) * | 2002-05-31 | 2003-12-11 | Telefonaktiebolaget Lm Ericsson | Indicating the forward link serving sector in high data rate cdma systems |
| CN1510857A (en) * | 1997-04-17 | 2004-07-07 | NTT�ƶ�ͨ������ʽ���� | Base station device in mobile communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1510857A (en) * | 1997-04-17 | 2004-07-07 | NTT�ƶ�ͨ������ʽ���� | Base station device in mobile communication system |
| CN1237839A (en) * | 1998-03-10 | 1999-12-08 | 松下电器产业株式会社 | CDMA transmission apparatus |
| WO2003103326A1 (en) * | 2002-05-31 | 2003-12-11 | Telefonaktiebolaget Lm Ericsson | Indicating the forward link serving sector in high data rate cdma systems |
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