CN1665177A - Signal source of analog SCDMA base station signal - Google Patents
Signal source of analog SCDMA base station signal Download PDFInfo
- Publication number
- CN1665177A CN1665177A CN2005100184415A CN200510018441A CN1665177A CN 1665177 A CN1665177 A CN 1665177A CN 2005100184415 A CN2005100184415 A CN 2005100184415A CN 200510018441 A CN200510018441 A CN 200510018441A CN 1665177 A CN1665177 A CN 1665177A
- Authority
- CN
- China
- Prior art keywords
- signal
- scdma
- acc0
- base station
- carry out
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to a signal source simulating the signal of a SCDMA base station, mainly comprising three parts: signal modulating part, downlinkamplifying circuit and power supply module, where the first part simulates to generate a paging broadcast channel ACC0 of the SCDMA base station; the second part amplifies the small SCDMA signal from the first part and then transmits the amplified signal to a retransmitting antenna or distributing system; and the third part supplies the power to the whole system. And the SCDMA signal source is connected with the retransmitting antenna and by the detection of the ACC0 signal by instrument, and it judges the extent of SCDMA signal loss caused by the engineering field, thus accurately determining point position and inlet level of the retransmitting antenna and providing a foundation for engineering design.
Description
Technical field
The present invention relates to a kind of signal source of simulating big well-informed SCDMA base station signal, also the SCDMA signal source.
Background technology
In the mobile communications network of China was built, more and more important role had been played the part of in the repeater.Provide the operator of wireless mobile service for employing SCDMA wireless access systems such as China Telecom and China Netcom, the coverage effect of SCDMA is directly connected to network service quality.And the SCDMA base station transmitting power is little, its limited coverage area, and therefore, the SCDMA repeater is being widely used aspect indoor covering and the outdoor enhancing.
At present, various types of SCDMA base station connect the SCDMA trunk amplifier indoor covering is provided and connect the SCDMA tower amplifier with the application that strengthens outdoor covering in, because wireless signal always is subjected to the influence of landform and man-made environment in the process of space transmission, in engineering survey and design, the point position of retransmitting antenna and antenna entry level are important link, also be a difficult point simultaneously, therefore whether reasonably determining of the some position of area of coverage internal antenna and antenna entry level become conceptual design major criterion.The size of the some position of antenna and antenna entry level in conceptual design in the past, generally add that by experience simple space link loss and building cut off loss and calculate, the scheme of designing like this can not reflect the actual conditions of engineering site very accurately, causes engineering effort undesirable.In order to make conceptual design satisfy the requirement of engineering site, and provide relevant survey and design data, must carry out simulation test, understand the extent of deterioration of engineering site, thereby accurately determine the some position and the entry level of retransmitting antenna the SCDMA signal to the user.
In the indoor and outdoor covering design, owing to lack SCDMA signal source simulation test, cause the scheme that designs unreasonable, the position of antenna point is inaccurate, and antenna outlet field intensity is not enough, causes switching in the communication process problems such as frequent.Cover this a part of simulation test for the SCDMA indoor and outdoor, existing method is to rely on easy signal source to carry out simulation test.This method of testing is to connect retransmitting antenna by descending simple signal source, another section use frequency spectrograph connects donor antenna and receives, realize simulation test, because the output of simple signal source is the analog signal that does not have through ovennodulation, therefore can not be received by present widely used all kinds SCDMA field test instrument, and test process need bring to engineering site with valuable test instrumentation, both dangerous also uneconomical, as direct employing signal of base station simulation test effect, this is very unreal border, infeasible in actual engineering.
Summary of the invention
The objective of the invention is to have the above-mentioned defective that exists in the SCDMA engineering design now, provide a kind of signal source of simulating big well-informed SCDMA base station signal, just the SCDMA signal source in order to overcome.After the SCDMA signal source, connect retransmitting antenna exactly, by the detection of instrument to paging broadcast channel ACC0 signal in the SCDMA signal, judge the extent of deterioration of engineering site, thereby accurately determine the some position and the entry level of retransmitting antenna, for engineering design provides foundation the SCDMA signal.
The signal source of analog SCDMA base station signal mainly comprises signal modulating part, descending amplifier section and power module three parts.The signal modulating part is used for simulating the paging broadcast channel ACC0 that produces the SCDMA base station, and its theory diagram as shown in Figure 3.Central processor CPU produces paging broadcast channel ACC0 frame sequence according to the SCDMA standard, carry out differential coding, carry out serial/parallel conversion then and be mapped to I and Q two-way, and carry out Walsh Walsh0 and 256 pseudorandom PN sign indicating number spread processing, send into finite impulse response filter FIR then and carry out the raised cosine Filtering Processing, carry out digital-to-analogue conversion D/A treatment conversion then and become analog signal, and carry out low-pass filtering LPF, send into the SCDMA control channel frequency range that the IQ modulator carries out difference quaternary PSK DQPSK modulation and upconverts to 1.8GHz; The SCDMA small-signal that descending amplifying circuit received signal modulation part is sent here also amplifies, and delivers to retransmitting antenna or connects the dried compartment system of broadcasting; The power module part is powered to whole system.Because the SCDMA system is the system of TDD working method, in the cycle of 10ms, up channel and the down channel 5ms that works respectively, and paging broadcast channel ACC0 signal to be per 50 frames 0.5 second send once, in the engineering survey simulation test, by using various types of SCDMA field test instruments to detect paging broadcast channel ACC0 signal, thereby accurately determine the some position and the entry level of engineering proposal retransmitting antenna.
Description of drawings
Fig. 1 uses block diagram for the signal source that simulation produces SCDMA base station calling broadcast singal.
Fig. 2 produces the signal source theory diagram of SCDMA base station calling broadcast singal for simulation.
Fig. 3 is the theory diagram of signal modulating part in the signal source.
Embodiment
In conjunction with Fig. 1, Fig. 2 and Fig. 3 SCDMA signal source implementation in the indoor and outdoor coverage test is described.The SCDMA signal source mainly comprises signal modulating part, descending amplifier section and power module three parts.The signal modulating part is used for simulating the paging broadcast channel ACC0 that produces the SCDMA base station, and its theory diagram as shown in Figure 3.Central processor CPU produces paging broadcast channel ACC0 frame sequence according to the SCDMA standard, carry out differential coding, carry out serial/parallel conversion then and be mapped to I and Q two-way, and carry out Walsh0 and 256 PN sign indicating number spread processing, send into finite impulse response filter FIR then and carry out the raised cosine Filtering Processing, carry out digital-to-analogue conversion D/A treatment conversion then and become analog signal, and carry out low-pass filtering LPF, send into the SCDMA control channel frequency range that the IQ modulator carries out difference quaternary PSK DQPSK modulation and upconverts to 1.8GHz; The SCDMA small-signal that descending amplifying circuit received signal modulation part is sent here also amplifies, and delivers to retransmitting antenna or connects the dried compartment system of broadcasting; The power module part is powered to whole system.Because the SCDMA system is the system of TDD working method, in the cycle of 10ms, up channel and the down channel 5ms that works respectively, and paging broadcast channel ACC0 signal to be per 50 frames 0.5 second send once, in the engineering survey simulation test, by using various types of SCDMA field test instruments, detect paging broadcast channel ACC0 signal, thereby accurately determine the some position and the entry level of engineering proposal retransmitting antenna.
Claims (2)
1, a kind of signal source of simulating big well-informed SCDMA base station signal, this signal source mainly comprises signal modulating part, descending amplifying circuit and power module three parts, the signal modulating part is used for simulating the paging broadcast channel ACC0 that produces the SCDMA base station; The paging broadcast channel ACC0 that control circuit control signal modulating part produces; The SCDMA small-signal that descending amplifying circuit received signal modulation part is sent here also amplifies, and delivers to retransmitting antenna or compartment system; The power module part is powered to whole system, it is characterized in that: the signal modulating part is simulated the paging broadcast channel ACC0 that produces the SCDMA base station as follows: central processor CPU produces paging broadcast channel ACC0 frame sequence according to the SCDMA standard, carry out differential coding, carry out serial/parallel conversion then and be mapped to I and Q two-way, and carry out Walsh Walsh0 and 256 pseudorandom PN sign indicating number spread processing, send into finite impulse response filter FIR then and carry out the raised cosine Filtering Processing, carry out digital-to-analogue conversion D/A treatment conversion then and become analog signal, and carry out low-pass filtering LPF, send into the SCDMA control channel frequency range that the IQ modulator carries out difference quaternary PSK DQPSK modulation and upconverts to 1.8GHz.
2, signal source according to claim 1 is characterized in that: the signal modulating part of signal source directly produces the SCDMA modulation signal of band paging broadcast channel ACC0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100184415A CN1665177A (en) | 2005-03-24 | 2005-03-24 | Signal source of analog SCDMA base station signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100184415A CN1665177A (en) | 2005-03-24 | 2005-03-24 | Signal source of analog SCDMA base station signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1665177A true CN1665177A (en) | 2005-09-07 |
Family
ID=35036090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100184415A Pending CN1665177A (en) | 2005-03-24 | 2005-03-24 | Signal source of analog SCDMA base station signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1665177A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101272189B (en) * | 2008-03-31 | 2011-04-06 | 浙江工业大学 | TD-SCDMA signal source development system based on ADS |
-
2005
- 2005-03-24 CN CN2005100184415A patent/CN1665177A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101272189B (en) * | 2008-03-31 | 2011-04-06 | 浙江工业大学 | TD-SCDMA signal source development system based on ADS |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101442367B (en) | Mobile-terminal simulator for a wireless telecommunications network | |
| CN103338086B (en) | Testing system for radio frequency consistency of satellite mobile communication terminal and testing method of testing system | |
| TWI351201B (en) | Wireless communication methods and apparatus supporting use of one or more frequency bands | |
| CN102148649B (en) | Method and system for testing space radio frequency performance of multi-antenna device | |
| WO2008084621A1 (en) | Wireless communication terminal device, access point device, wireless communication system, and information service method and information fetching method in the system | |
| MY150337A (en) | Method and apparatus for transmit power calibration in a frequency division multiplexed wireless system | |
| BRPI0703862A (en) | intercellular interference control method in mobile communication system | |
| CN102158873A (en) | Multi-antenna system based method and system for testing over the air (OTA) performance | |
| CN103763719A (en) | Simulation drive test method for TD-LTE system | |
| WO2005114871A3 (en) | System and method for detection of mobile operating through a repeater | |
| CN102480743A (en) | Positioning method of cross-cell coverage, apparatus and system thereof | |
| NO20003626L (en) | Cellular radio system comprising at least two measuring devices for locating a mobile station | |
| CN106130573B (en) | The pilot signal method for generation of NB-IoT pilot signal generating device | |
| CN101668228B (en) | Device and method for testing interface | |
| DE602005007174D1 (en) | Method of using the signal-to-noise ratio (SNR) to reduce the test factory time | |
| CN1665177A (en) | Signal source of analog SCDMA base station signal | |
| CN210927985U (en) | Metering automation terminal communication module | |
| CN102711240B (en) | Indoor orientation method, collecting method and system | |
| CN102111768A (en) | Multi-frequency band common networking method and device | |
| DE60236185D1 (en) | SYSTEM AND METHOD FOR EMULATING MOBILE NETWORKS AND ASSOCIATED EQUIPMENT | |
| CN100342671C (en) | Signal source capable of simulating PHS base station signal | |
| CN105743570A (en) | Methods and devices for measuring and correcting time delays of digital fiber distribution system | |
| CN103095385B (en) | Cellphone power meter | |
| CN204350311U (en) | WCDMA mobile message active acquisition equipment | |
| CN114268982A (en) | Vehicle-mounted mobile communication terminal test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20050907 |