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1
Chen, Yuanxin. "Building software tools for combat modeling and analysis." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://handle.dtic.mil/100.2/ADA429676.
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Thesis (M.S. in Computer Science)--Naval Postgraduate School, Dec. 2004.Thesis Advisor(s): Mikhail Auguston. "December 2004." Includes bibliographical references (p. 179-180). Also available online.
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Šuška, Boris. "Syntaxí řízený editor." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2009. http://www.nusl.cz/ntk/nusl-236695.
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This thesis is dealing with integration of available lexical analyzer generator tools and presents concept of parallel syntax analysis based on block-oriented syntax analysis. Results will be used during development of syntax-directed editor under Eclipse platform latter.
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DePasquale, Gerald Anthony. "Design and implementation of Module Driver and Output Analyzer Generator." Thesis, Monterey, California. Naval Postgraduate School, 1990. http://hdl.handle.net/10945/30637.
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Werner, Jeffrey M. "Payload Data Analyzer and Payload Data Generator System for Space Station Integration and Test." International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/607574.
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International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, NevadaTo support the processing of International Space Station (ISS) Payloads, the Kennedy Space Center (KSC) had the need to develop specialized test and validation equipment to quickly identify interface problems between the payload or experiment under test and the communication and telemetry downlink systems. To meet this need, the Payload Data Analyzer (PDA) System was developed by the Data Systems Technology Division (DSTD) of NASA’s Goddard Space Flight Center (GSFC) to provide a suite of troubleshooting tools and data snapshot features allowing for diagnosis and validation of payload interfaces. The PDA System, in conjunction with the Payload Data Generator (PDG) System, allow for a full set of programmable payload validation tools which can quickly be deployed to solve crucial interface problems. This paper describes the architecture and tools built in the PDA which help facilitate Space Station Payload Processing.
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Ritter, David M., and Tina Dr Smilkstein. "Verification of Receiver Equalization by Integrating Dataflow Simulation and Physical Channels." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1733.
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This thesis combines Keysight’s SystemVue software with a Vector Signal Analyzer (VSA) and Vector Signal Generator (VSG) to test receiver equalization schemes over physical channels. The testing setup, “Equalization Verification,” is intended to be able to evaluate any equalization scheme over any physical channel, and a decision-directed feed-forward LMS equalizer is used as an example. The decision-directed feed-forward LMS equalizer is shown to decrease the BER from 10-2 to 10-3 (average of all trials) over a CAT7 and CAT6A cable, both simulated and physical, for 1GHz and 2GHz carrier, and 80MHz data rate. A wireless channel, 2.4GHz Dipole Antenna, is also tested to show that the addition of the equalization scheme decreases BER from 10-5 to less than 10-5. Then the simulation and equalization parameters (LMS step size, PRBS, etc.) are changed to further verify the equalization scheme. The simulated channel BER results do not always match the physical channel BER results, but the equalization scheme does decrease BER for both wired and wireless channels.
Then transistor-based equalization model is created using both HDL SystemVue components and blocks easily implemented by transistors. The model is then verified using HDL, Spice, and SystemVue simulation. Overall this thesis accomplishes its goal of creating a testing setup, Equalization Verification, to show that adding a given simulated equalization scheme in SystemVue can improve the quality of the link, by decreasing BER by at least an order of magnitude, over a specific physical channel.
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Pinto, Tasso Tirapani Silva. "GGLL: um gerador de analisadores sintáticos para gramáticas gráficas LL(1)." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/45/45134/tde-23012015-075452/.
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Este trabalho tem como fulcro o desenvolvimento de um gerador de analisadores sintáticos do tipo top-down para gramáticas LL(1) com entrada gráfica da gramática, bem como uma comparação do mesmo com outros geradores em uso no mercado. Como resultado foi obtido um gerador totalmente funcional, e foi mostrado como ele é superior aos outros analisadores. São descritos detalhes da implementação e foi elaborado um manual de uso do sistema implementado em Java independente de ambientes de programação.This thesis has as its main goal the development a parser generator using top-down syntax analysis for LL(1) grammars. Its input is a graph grammar. A comparison with available parser generators is also presented. As a result a fully executable generator, and the fact that it is superior to the other generators was demonstrated. This work contains details of the implementation, and presents a users manual of the system, which was implemented in Java. The system is independent of programming environments.
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Mantena, Shanmukha Raju. "Verification of Third Party Components to The Road Telematics Communicator." Thesis, Blekinge Tekniska Högskola, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-20580.
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The Road Telematics Communicator (RTC) as it is called in Scania. It is the device responsible to keep the vehicle connected and send the vehicle data to the off-board system. It uses data from different sources such as GNSS signals, CAN signal, and wireless Telecom signals. Connected vehicles provide real-time information on positioning, fuel consumption, and vehicle diagnostics. There are acceptance and regression test suites that verify the functionality of RTC. Third-party components such as the GNSS module are not a part of the tests due to technical limitations. Hence RTC lacks automated tests for important features. Due to the lack of complete verification in automated test suites, time-consuming tests must be performed on the road. And trouble reports from the field are difficult to analyze. This thesis provides testing the location accuracy of the GNSS module in vehicles used for telematics applications in the automotive industry, by using a GPS vector signal generator in a controlled lab environment. GNSS consists of GPS, GALILEO, GLONASS, BEIDOU. We are using GPS in this research. The GPS receiver is put under test in a controlled lab environment for testing the Time to First Fix, Location accuracy of GPS receiver, and analyzing the performance with the given inputs. Test cases were created similar to field tests on the signal generator. At this stage, an experiment is performed on the GPS receiver which is connected to the signal generator via RF connector and to a computer via LAN. An input data is sent to the signal generator in the form of SCPI commands. The signal generator processes these commands and generates a signal accordingly. This generated signal is fed to the receiver. With the help of a signal generator, we can generate fields like inputs and verify the behavior of the GPS module. By verifying the behavior of the module, we can develop test cases that show the functionality of the receiver.
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Kilicoglu, Nezaket. "Construction Of An Experimental Radar System." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612760/index.pdf.
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In this thesis, an Experimental Radar System is designed and constructed for
use in experimental radar studies such as clutter measurement and target
detection, both in the laboratory and outdoor. COTS laboratory equipments are
utilized as hardware elements of the radar and MATLAB is used as signal
processing and user interface software tool. Vector signal generator (as
transmitter), spectrum analyzer with vector signal analysis (as receiver), a high
power amplifier, a low noise amplifier, horn antennas and a computer are the
hardware units of the system. Various transmit signals are generated and pulse
Doppler processing is performed at the receiver side. The system is controlled
through the user interface which runs on a PC.
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Nguyen, Van Liem, Henrik Tollin, and Thanh Tu Tran. "Coupling of a home-made simulated automatic mercury analyzer (AMA254) to a mercury fluorescence detector for total mercury determination in biological samples : -The use of a hydride generator system and atomic absorption spectroscopy to detect mercury in water samples." Thesis, Umeå universitet, Kemiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-56597.
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In this project we have been working with two different instruments home-made AMA 254 and Hydride Generator. Home-made AMA 254 was coupled to a fluorescence detector. The Hydride Generator was coupled to atomic absorption spectroscopy (AAS), by an optical path. Calibration of mass-flow controller by applying a suitable gas in the inlet and a bubbles calibration unit at the outlet. All date was saved by labview program was used The first configurations, carrier gas was fed into the middle of the catalyzer tube and the gold-trap by a T-shape connector to carry mercury to the detector. Condensation of mercury vapour when the gas-stream collided to the silicon walls, at the T-shape connection leads to failing. Second configuration, two positioned-switching valve was introduced between the oxygen and argon tanks, allowing only one gas to reach MFC depending on the switching position. There are four different parameters memory effects, repeatability, accuracy and sensitivity, have to investigated to know that the machine gives reliable result when running real samples. Memory effects: Memory effect is one reason for deviation of the analysis. It is obvious that some mercury still remains within the tube after running. Memory effect is not significant at high concentration of the analyte, but could be troublesome at lower concentration. Repeatability: Repeatability was tested by running 3 replicates with the same concentration of the analyte. This is important for knowing the precision of the analysis. Accuracy: The Reference material MESS-92 (92ppb) was used to evaluate the accuracy of the analysis . Triplicate was running and the mean value was calculated to 98.3 ppb, the deviation was 6.86%. Sensitivity: By comparing the mercury fluorescence detector and atomic absorption (AAS) it become evident that the fluorescence detector is much more suitable for analysis with AMA 254 as it gave an overloaded signal whereas the atomic absorption only appeared as noise. Minor Field Study in Chemistry – Autumn 2010 Page 4 The comparison between the mercury fluorescence detector and atomic absorption (AAS) was done with 0.05 gram(g) tuna fish samples. Mercury fluorescence detector gave an overloaded signal, whereas the AAS signal appeared as noise. It is evident that the fluorescence detector is much more sensitive than the AAS detector. Hydride generation is one common method for determining mercury in water. Three different channels are used for pumping the solutions and forming hydride, they are Hydrochloric acid, NaBH4and sample (blank, standards). The hydride form of mercury was flushed and collected into the gold trap by nitrogen gas. After that the gold-trap is heated up to release mercury optical cell where the absorption as a peak was measured in the same manner as normal flame AAS without using of flame. In our project we also made up a temperature controller to control the temperature. The real temperature was measured by thermocouple and was designed like a small box.
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Viktorin, Jiří. "Aplikace hlubokých zásobníkových automatů v kompilátorech." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2009. http://www.nusl.cz/ntk/nusl-236718.
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In this thesis, I focus on the application of deep pushdown automatons in compilers, their composition in the parser, and the possibility of further recovery. Thanks to these automatons can carry out the expansion of the nonterminals in various depths and thus makes it possible to use other records of expressions.
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Priškin, Jiří. "Vysokofrekvenční obvodový analyzátor s DDS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218400.
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At first this thesis is dealing with the basic principles of network analyzers and afterwards goes to propose conception of a polyscope, as a special type of the scalar network analyzer, designed for magnitude frequency response measurement of two-port devices. As a result of this part of the thesis is the polyscope's block circuit diagram and also selection of key integrated circuits for sweep generator, logarithmic detector and control circuits. As the following part of the thesis is a design of the all basic analyzer's circuits resulting in their schematics diagrams and printed circuit boards, do assembly of all modules and mechanical construction of the instrument and look of the front panel. Some of the tasks is implementation of the firmware and personal computer application able to download measured data from the circuit analyzer via USB and generate chart in Microsoft Office Excel book.
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Štěrba, Václav. "Návrh 10-ti kanálového equalizeru s optimalizací kmitočtové charakteristiky a spektrálním audio-analyzátorem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219896.
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This work deals with the design of a 10-zones equalizer with optimized frequency characteristics with a spectrum audio analyzer. In this work the problem of processing audio signals using equalization for filtering the interference frequencies, correction of frequency cover signal boost or suppression of the required zones of the audible spectrum are also analyzed. The influence of subjective perception of sound intensity of the audio signals reproduction and its use in working with equalizer is discussed too. The work describes the principles and usage of the audio-analyzer as a tool for the optimization of the audio equalization setting when ensuring the appropriate listening conditions of music reproduction, spoken word, sounds, etc. It also focuses on the signal source for testing audio-chains, their generation and measurement using the audio analyzer. The equalizer equipment, audio-analyzer generator of reference signals equipment and power supply are designed as a single unit.
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Ďurčanský, Norbert. "Generátor zefektivňující tvorbu a udržovatelnost single-page aplikací." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2019. http://www.nusl.cz/ntk/nusl-403153.
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This diploma thesis deals with developing generator for single-page applications. Before developing the application it was necessary to identify problem areas that prevent the development and describe tools that make it easy to create, test, maintain, and deploy single-page applications. Based on the obtained information, the generator Create Sbspa is designed and implemented to efficiently create single-page applications and help to eliminate development problems. It generates configuration and code from semantic templates. The generator is available through a user interface that splits the templates into the groups by applicability. The generator was designed with the need for simplicity and clarity to enable efficient integration with new features. This work also includes design and implementation of the example app which shows features and benefits of the generator.
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Blažek, Martin. "Interaktivní interpret jazyka C." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235978.
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This master's thesis deals with implementation of ISO C99 language interpreter. The goal of this thesis is to provide support of education in C language programming and fast algorithm prototyping. It enables students to create own C programs and to experiment with language constructions without compiling. User interface includes editor and simple debugger. The interpreter is implemented in a novel grammar development environment written in Java language - ANTLRWorks which includes ANTLR language tool.
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Park, Jong-Min. "Analyzer/code generator for the galaxy compiler." 1988. http://catalog.hathitrust.org/api/volumes/oclc/17633572.html.
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Thesis (M.S.)--University of Wisconsin--Madison, 1988.Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 91-92).
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XU, JUN-JIE, and 徐俊傑. "Testability analyzer and test pattern generator of digital circuits." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/05487583463746358548.
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Yeh, Cheng-Yu, and 葉政育. "An Efficient Text Analyzer by Prosody Generator Driven Approach for Mandarin TTS." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/78289254266232939531.
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碩士國立臺北科技大學
電機工程系碩士班
90
An efficient text analyzer which is driven by prosody generator for Mandarin text-to-speech will be analyzed and designed in this thesis. Three research topics are analyzed in detail and the system implementation is done efficiently according to these analytic results. For the topic #1, the contribution of each linguistic feature on the prosody generator will be analyzed. For the topic #2, the cross-influence of each linguistic feature on the prosody generator will be analyzed. For the last topic, the entropy of linguistic feature will be employed to examine the problem of over-classification on the linguistic feature. Finally, the efficient text analyzer architecture will be designed based on these analytic results. For the performance testing, totally 39,103 Chinese characters can be segmented into word sequences within 78ms under personal computer(P4-1.4G.). The correction rate of word tagging with 97% is achieved. It confirms that the performance of our text analyzer is very good.
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Wang, Ting-Chun, and 王鼎鈞. "IEEE 802.11ax Vector Signal Generator and Analyzer based on Software Defined Radio." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/3zagrw.
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碩士元智大學
電機工程學系乙組
107
Following the footstep of 5G era, the IEEE wireless local network (WLAN) standardization body has also proposed its 802.11ax draft standard in 2019, namely the high efficiency (HE) WLAN. Compared to former 802.11ac spec, the new standard can not only support both indoor and outdoor applications and advanced multiple-input and multiple-output (MIMO) technology, but also adopt the orthogonal frequency division multiple access (OFDMA) to divide the spectrum usage into resource unit (RU) under dense multiuser scenario. As a result, its spectral efficiency is increased dramatically with a peak data rate over 10Gbps. In this thesis, we employ a very cost-effective way to design and implement the vector signal generator and analyzer (VSG/VSA) that are fully compliant to 802.11ax spec. First, according to the 802.11 ax D3.0 PHY spec, we design the TX algorithms and implement the VSG core software. Then the VSG functions and performance is verified by the Keysight 89600 VSA. Next, we design the RX algorithms and its VSA software, including the symbol/carrier synchronization, channel estimation/equalization, signal field demodulation/decoding, pilot-based carrier phase tracking, and up to 1024-QAM constellation demapping and error vector magnitude (EVM) calculation, etc. Finally, we connect our open-platform VSG and VSA software to various instrument and software defined radio platforms to transmit and receive the real-world 802.11ax RF (Radio Frequency) signal, while we let the Keysight Infiniium DSO with 89600 VSA serve as the cross reference for comparison. The experimental results show that by using a low-cost USRP platform with our VSG/VSA software, the measured EVM results is only slightly inferior to the cross reference. Therefore, it is concluded that our approach is highly applicable to practice, and can significantly reduce the testing cost of various future 802.11ax products.
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Chen, Yen-Chun, and 程彥鈞. "IEEE 802.11ac Multiple Input Multiple Output Vector Signal Generator and Analyzer Software Development." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/33rraj.
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碩士元智大學
通訊工程學系
106
WiFi is the most commonly used technology for local area networking. To meet the increasing demand for higher data transmission rate in the past years, the new generation WiFi standards such as IEEE 802.11n and 802.11ac have adopted MIMO-OFDM system architecture to support transmitting multiple parallel data streams in spatial domain. As such WiFi MIMO products become prevailing, however, costly instruments are highly needed for testing and verification, especially the MIMO vector signal generator and analyzer (VSG/VSA). Therefore, in this thesis we follow the 802.11ac spec to realize its multi-channel VSG and VSA core softwares. Moreover, by integrating with those low-cost software defined radio (SDR) platforms, we attempt to construct a more flexible and competitive measurement solution to reduce the industrial testing cost in both the RD and manufacturing processes. First, according to the IEEE 802.11 MIMO-OFDM physical layer (PHY) spec, we self develop the VSG software which can generate up to eight parallel spatial data streams. The correctness of our VSG is then verified by the Keysight 89600 VSA, in terms of frame structure, signal field, spectrum, and various modulation formats’ EVM. Next, we design the 802.11ac VSA algorithm under realistic RF signal measurement environment. More specifically, a complete set of receiver algorithms are developed for packet detection, carrier frequency offset (CFO) and symbol timing offset estimation, space-time channel estimation and equalization, and QAM demodulation and decoding. As a result, our VSA software can output the CFO estimate, signal spectrum, constellation, EVM, MIMO channel capacity and PHY throughput, etc. Finally, we employ the instruments-based MIMO-SDR (IB-MIMO-SDR) platform in our laboratory to test both the developed 802.11ac VSG and VSA softwares. By generating the baseband I/Q wavforms using our VSA, we link the VSA to SDR for transmitting realistic 802.11ac RF MIMO signal. Then we analyze and demodulate the MIMO signal in terms of both the commercial VSA and our VSA. By comparing the testing experimental results, we conclude that our 802.11ac MIMO VSA has successfully achieve its functionality as desired, but its EVM performance is still worse than commercial VSA by 1~2 %. Hence, improving the performance remains as a future task.
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Chiu, Kuan-Yu, and 邱冠瑜. "5G NR Uplink Vector Signal Generator and Analyzer based on Software Defined Radio." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ty68f6.
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碩士元智大學
電機工程學系乙組
107
The 3GPP 5G new radio (NR) standard has launched the 5G Era. Nowadays, telecom industries all over the world are all engaging on developing various 5G technologies and products. In the future, massive deployment of 5G gNBs and a varieties of UEs will be pushed to markets. However, during the whole process of 5G R/D, fabrication, and deployment, it is a tradition to employ those very expensive vector signal generator and analyzer (VSG/VSA) produced by a few international instrument companies to verify the device under test. Aware of this, we are thus ambitious to develop open-platform VSG and VSA software connected to low-cost software defined radio (SDR) for 5G UE testing, hoping to make a great contribution to industry. In this thesis, we completely follow the newly released 3GPP R14 5G NR standard to design and implement its uplink VSG and VSA, including all the physical layer (PHY) uplink signals and channels. First, according to the many numerologies of 5G FR1 & FR2 signal formats and parameters, we design TX algorithm to generate the baseband I/Q vector signal, and use MATLAB to implement the VSG core software. Then we connect the VSG to instrument-based SDR (IB-SDR) platform to transmit high bandwidth mmW 5G FR2 signal. Next, we conduct the RX algorithm and VSA core software design, including the compensation of RF imperfections like TX Dc offset, I/Q imbalance, channel delay and channel dispersion, and carrier frequency offsets etc. Meanwhile, the VSA analyzes all the PHY signal/channel constellations and EVMs. Finally, we connect our VSG/VSA software with USRP N310 SDR platform to transmit and receive real-world 5F NR signals for an integrated verification. At the same time, the Keysight Infiniium DSO with 89600 VSA serves as a cross reference. It is shown that not only our VSG and VSA software work as expected, but also the SDR-based platform can achieve a performance close to the high-end commercial instrument. Therefore, the proposed 5G IB-SDR integrated VSG/VSA platform can lead to a dramatic reduction of 5G UE testing expenses. Furthermore, such a platform has the additional advantages of open platform connection and easy customization since the measurement technology is fully developed by ourselves.
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Yao, Yen-Ju, and 姚彥如. "NB-IoT Uplink Vector Signal Generator and Analyzer Design and NPRS Based OTDOA Positioning." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/33meqy.
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碩士元智大學
通訊工程學系
106
3GPP completed the NB-IoT R14 standard in June 2017. The IoT service of telecom operators has been officially transferred, and NB-IoT has begun to flourish. Since both R&D and mass production require expensive equipment to verify their products. Therefore, in this thesis we have designed the uplink vector signal generator (VSG) and analyzer (VSA) algorithms according to NB-IoT R14 physical layer (PHY) specification. Then combined with the software-defined radio (SDR) platform, our testing platform can even achieve a performance close to commercial instruments, making it attractive for industrial applications. The contribution of this study can be divided into four parts. First, we generate the NB-IoT uplink signal in software, and actually transmit the RF signal on the SDR platform composed of the instrument and MATLAB. We then verify the correctness of the signal by commercial VSA. Secondly, we consider the actual RF transmission problem, and design the uplink VSA algorithm operating on the SDR platform. From the EVM results and comparison with the commercial VSA, it shows that our VSA performs close to the expensive commercial VSA. Thirdly, we study the synchronization problem for superimposed NPRACH (Narrowband Physical Random Access Channel) preambles under multi-UE case. Low-complexity algorithm for estimating the RCFO (residual carrier frequency offset) and ToA (Time of Arrival) parameters is developed, and it can even outperform the existing method in [1]. Finally, according to the new downlink narrowband positioning reference signal (NPRS) of NB-IoT R14, we propose a low-complexity frequency-domain ToA estimation method for the hyperbolic positioning of UE based on OTDoA (Observed Time Difference of Arrival). As compared to the conventional time domain cross-correlation ToA estimation method, the proposed method not only eliminates the discrete grid problem in positioning coordinates, but also has significantly better positioning accuracy within 50m, as shown by the simulation results under the Rician fading, EPA (Extended Pedestrian A model), and ETU (Extended Typical Urban model) channels.
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Hu, Pei-Chi, and 胡珮琪. "FDD/TDD-LTE Uplink Vector Signal Generator / Analyzer with Software Radio and OpenAirInterface Experimentation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/33677790870936436366.
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碩士元智大學
通訊工程學系
105
Nowadays the 4G LTE related industry has kept prospering. To test and verify a variety of LTE products, advanced measurement equipment is required during the process of both the development and production stages. Therefore, if there is a cost effective way to achieve LTE PHY testing and verification, it will be of great benefit for the industry. In this thesis, we have sucessfully developed the FDD/TDD LTE UL vector signal generator (VSG) and vector signal analyzer (VSA) core software. First, we design the VSG software to generate all the uplink physical signals and channels that are fully compliant to the LTE FDD/TDD specifications. With our instrument-in-MATLAB software defined radio (IM-SDR) platform, real-word LTE UL signals can be transmitted and demodulated by commercial LTE VSA to verify the signal integrity. Next, we design the SDR-based VSA algorithms, including carrier frequency offset estimation, signal frame and symbol synchronization, channel estimation and equalization, etc. The testing results show that the VSA’s measured EVM accuracy is comparable to costly commercial LTE VSA. Thirdly, we aim to estimate and compensate the RF impairments parameters due to transmitter DC offset, IQ gain/phase imbalance, and sampling clock offset. It is shown that our estimation results are even more accurate than the famous Keysight 89600 VSA in some cases. Finally, we try to conduct a basic UL signaling VSA test of a commercial LTE UE dongle by using the LTE open source software OpenAirInterface (OAI). In so doing, the OAI user interface is modified to calculate the EVM and plot the FFT spectrum of the UL signal.
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Lin, Chun-Ju, and 林君儒. "NB-IoT Uplink/Downlink Vector Signal Generator and Analyzer based on Software Defined Radio." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/14420275470719196450.
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碩士元智大學
通訊工程學系
105
The narrowband Internet-of-things (NB-IoT) standard finalized in the mid 2016 by 3GPP is now highly esteemed by worldwide telecommunication operators and equipment providers. In the thesis, we will fully follow the LTE R13 physical layer (PHY) specification to develop the NB-IoT downlink (DL) and uplink (UL) signal generation and analysis (VSG & VSA) algorithms and software. For both the DL and UL signals, we first focus on the baseband I/Q signal generation, including all the PHY synchronization signals and channels. Then the generated baseband I/Q patterns can be up-converted to real-world RF NB-IoT signal by using a variety of software defined radio (SDR) platforms connected to our VSG software via some control interface. The cross-platform flexibility includes instruments-based SDR or low-cost USRP SDR. Through using commercial VSA instrument for interoperability test, we can verify the correctness and accuracy of our VSG software. Next, to receive the NB-IoT signals, we design the NB-IoT VSA algorithm and software, including timing and carrier synchronization, cell searching, and channel estimation and compensation, etc. Then we examine the signal constellation and error vector magnitude (EVM). Experimental setting is demonstrated to verify the performance of our VSA by comparing the EVM result with the commercial VSA. Furthermore, we also generate the newly designed frequency-hopping Narrow-band Physical Random Access CHannel (NPRACH), and devise an efficient receiver algorithm with the Neyman Pearson threshold for constant false alarm rate detection. Finally, all the real-world testing results show that our cross-platform NB-IoT VSG and VSA solution can achieve comparable performance with those costly commercial VSG and VSA instruments.