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809 results about "Load testing" patented technology
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Load testing is the process of putting demand on a system and measuring its response.
System load testing coordination over a network
A method and system using one or more load cells coordinates load testing of one or more sites under test over a network such as the Internet in accordance with one or more load test requests. In one embodiment, such method and system facilitates an economic, efficient, and accurate evaluation of the capacity of the SUTs to support concurrent users of the SUTs. A load test request is received from a User and provides information concerning a load test to be performed on a site under test (SUT). A load test is generated, and the load test is allocated to one or more load cells. The load cells perform the load test by sending load test data to the SUT and receiving responses from the SUT. Portions of a load test may be allocated to different load cells, which may be geographically remote from the SUT and / or geographically diverse. Multiple concurrent pending load tests may be processed for the same SUT. A load cell may concurrently perform all or a portion of multiple different load tests for multiple different SUT's simultaneously. A reporting function generates a report based on the responses received from the SUT. The reporting function may in addition or alternatively allow the User to view real-time results during load test execution.
Owner:EUREKA SOFTWARE SOLUTIONS
FPGA-based network device testing equipment for high load testing
InactiveUS7953014B2High load in testIncrease speedError preventionFrequency-division multiplex detailsPhysical layerPattern generation
Network device testing equipment capable of testing network devices using small size packets and for a transferring ability and a filtering ability at a media speed is described. A configuration is adopted in which a Field Programmable Gate Array (FPGA) included in a transmitter or receiver on one or both of transmitting and receiving sides is connected directly to a physical layer chip of a network and computers on both the transmitting and receiving sides are connected thereto. Each of the FPGAs of the transmitter and receiver has a circuit which has an integrated function of transmitting a packet pattern generation function and a packet-receiving function, thereby enabling a test and an inspection in real time. When inspecting the filtering function, a hash table storing therein a hash value and a list of occurrence frequencies for hash values is utilized. In order to avoid the hash values of different packets from having a same value, the hash function is configured so as to avoid that the same hash value is given to different packets or, when packet values have a common hash value, the packet is re-shaped into a packet having a different hash value.
Owner:NAT INST OF ADVANCED IND SCI & TECH +2
Load test monitoring system
A system for load test monitoring a computer system is provided. The system includes a transaction generator to provide transactions to servers to load test the servers. The system includes one or more agents provided on the servers, the agents operable to obtain server statistics from servers during load testing. The system also includes a display including a plurality of gauges. Each gauge depicts transactions statistics based on the transactions generated by the transaction generator for each server and further depicts server statistics for each server as obtained by the agents. Based on the displayed transaction and server statistics the transaction generator is adjustable to optimize the load test of the servers.
Owner:SPRINT CORPORATION
Use of a single thread to support multiple network connections for server load testing
A load testing system for testing a web site or other type of server system uses a thread architecture that reduces the computing resources needed to generate a desired load. The load testing system runs several virtual users on one or more clients to simulate user interactions with the web site. Each virtual user is executed as a virtual user thread under a process on a client computer. Each virtual user thread itself establishes and supports multiple connections to the web site; therefore, an additional thread need not be created for each connection. For each connection, the virtual user thread performs a sequence of functions in an asynchronous mode to establish and support the connection. If a function cannot complete without blocking, it immediately returns a RESOURCE UNAVAILABLE error code. If a function returns a RESOURCE UNAVAILABLE code, the calling thread switches execution to another task. After the condition causing the RESOURCE UNAVAILABLE error code has been resolved, the thread can switch back to executing the interrupted task. In this manner, the single thread is able to support multiple simultaneous connections.
Owner:MICRO FOCUS LLC
System load testing coordination over a network
A method and system using one or more load cells coordinates load testing of one or more sites under test over a network such as the Internet in accordance with one or more load test requests. In one embodiment, such method and system facilitates an economic, efficient, and accurate evaluation of the capacity of the SUTs to support concurrent users of the SUTs. A load test request is received from a User and provides information concerning a load test to be performed on a site under test (SUT). A load test is generated, and the load test is allocated to one or more load cells. The load cells perform the load test by sending load test data to the SUT and receiving responses from the SUT. Portions of a load test may be allocated to different load cells, which may be geographically remote from the SUT and / or geographically diverse. Multiple concurrent pending load tests may be processed for the same SUT. A load cell may concurrently perform all or a portion of multiple different load tests for multiple different SUT's simultaneously. A reporting function generates a report based on the responses received from the SUT. The reporting function may in addition or alternatively allow the User to view real-time results during load test execution.
Owner:EUREKA SOFTWARE SOLUTIONS
Method for building enterprise scalability models from load test and trace test data
A method is disclosed that preparing a discrete event simulation model of a production network is provided including a client and a plurality of servers connected by a network comprising the steps of initiating a single business function trace test on the production network; gathering network from trace data from the network; deriving a transaction summary from the network flow trace data; initiating a single business function load test on the production network; gathering resource data from the plurality of servers; normalizing the resource data; gathering web log data from at least one server from the plurality of servers; calculating a number of business functions running on the production network; calculating a consumption of resources used by the plurality of servers; calculating a business function cost associated with the consumption of resources; creating a business function profile from the transaction summary and the business function cost; and building a discrete event simulation model from the business function profile.
Owner:HYPERFORMIX
Apparatus and method for simulating a battery tester with a fixed resistance load
InactiveUS7595643B2Batteries circuit arrangementsMaterial analysis by electric/magnetic meansElectrical resistance and conductanceCurrent load
A method and apparatus for simulating a battery tester with a fixed resistance load, such as a widely used Japanese load tester that rates the strength of Japanese batteries that are categorized under the Japanese Industrial Standard (JIS), are provided. This invention simulates such a device without invoking large current loads, yields familiar results, utilizes an existing database and provides more conclusive testing. The method includes estimating a battery load test voltage as a function of a measured battery dynamic parameter, an open circuit voltage, the load resistance value of the load tester and the battery temperature. A bounceback voltage (BBV) of the battery is also predicted. The BBV, load voltage and battery temperature are utilized to rate the strength of the battery. Also, to improve the accuracy of test results for a substantially discharged battery, one embodiment projects the results of recharging discharged batteries without actually doing so.
Owner:MIDTRONICS
Micro material mechanical performance testing platform under stretching-bending-twisting multi-loads
ActiveCN103389243ANovel ideaCompact structureMaterial strength using tensile/compressive forcesMaterial strength using steady bending forcesElectromechanicsStress level
The invention relates to a micro material mechanical performance testing platform under stretching-bending-twisting multi-loads, and belongs to the field of electromechanics. The micro material mechanical performance testing platform comprises a tension and compression module, a bending module, a twisting module, a detection control module and a test-piece clamping module, wherein the testing platform takes the tension and compression module as a basic function module; the twisting module is arranged at one end of the tension and compression module; the test-piece clamping module is arranged on the tension and compression module; the bending module is independently arranged at one side of a portal frame. The micro material mechanical performance testing platform can be taken as a material mechanical performance test device with an independent stretching / compressing mode or an independent bending mode or independent twisting mode, namely a single load testing mode, and can be applied to a material mechanical performance test of a twisting load under the given stretching / compressing stress level or a material mechanical performance test of a bending load under the given stretching / compressing stress level, namely a composite load testing mode. The stress strain process of a material under the effect of a composite load can be detected by the collection of a load / displacement signal by using the detection control module.
Owner:JILIN UNIV
Load test simulator
InactiveUS20050216234A1Resistance/reactance/impedenceNuclear monitoringNetwork connectionClient-side
Systems and methodologies are provided for load testing a server wherein user characteristics are adjusted dynamically during the testing period of the server, based upon weightings defined in a user profile. Such dynamic adjustment enables a distribution of user characteristics as a percentage of total requests, (e.g. a per iteration model). The user characteristics can include type of user activities on a web page (e.g. search, browse, check out), browser features (e.g. browser type, browser version) net work connections, various client / server hard ware / software configurations and the like.
Owner:MICROSOFT TECH LICENSING LLC
Electronic battery tester configured to predict a load test result based on open circuit voltage, temperature, cranking size rating, and a dynamic parameter
ActiveUS7723993B2Batteries circuit arrangementsMaterial analysis by electric/magnetic meansElectrical resistance and conductanceHigh rate
A method and apparatus is provided for rapidly and safely estimating the high-rate load test voltage of a storage battery utilizing open-circuit voltage, temperature and a dynamic parameter such as conductance or resistance. An output indicative of the condition of the battery is provided as a function of the estimated load test voltage of the battery compared to industry standards without the necessity to charge the battery or discharge the battery with high-rate loads using bulky load testing equipment.
Owner:MIDTRONICS
System load testing coordination over a network
A method and system using one or more load cells coordinates load testing of one or more sites under test over a network such as the Internet in accordance with one or more load test requests. In one embodiment, such method and system facilitates an economic, efficient, and accurate evaluation of the capacity of the SUTs to support concurrent users of the SUTs. A load test request is received from a User and provides information concerning a load test to be performed on a site under test (SUT). A load test is generated, and the load test is allocated to one or more load cells. The load cells perform the load test by sending load test data to the SUT and receiving responses from the SUT. Portions of a load test may be allocated to different load cells, which may be geographically remote from the SUT and / or geographically diverse. Multiple concurrent pending load tests may be processed for the same SUT. A load cell may concurrently perform all or a portion of multiple different load tests for multiple different SUT's simultaneously. A reporting function generates a report based on the responses received from the SUT. The reporting function may in addition or alternatively allow the User to view real-time results during load test execution.
Owner:EUREKA SOFTWARE SOLUTIONS
Method and system for automated analysis of the performance of remote method invocations in multi-tier applications using bytecode instrumentation
ActiveUS20070169055A1Minimal disruptionError detection/correctionSpecific program execution arrangementsSerializationClient-side
Provided is a method and system for monitoring and diagnosing the performance of remote method invocations using bytecode instrumentation in distributed multi-tier applications. The provided method and system involves automated instrumentation of client application bytecode and server application bytecode with sensors for measuring performance of remote method invocations and operations performed during remote method invocations. Performance information is captured for each remote method invocation separately, allowing performance diagnosis of multithreaded execution of remote method invocations, so that throughput and response time information are accurate even when other threads perform remote method invocations concurrently. This makes the present invention suitable for performance diagnosis of remote method invocations on systems under load, such as found in production and load-testing environments. The captured performance metrics include throughput and response time information of remote method invocation, object serialization, and transport. The performance metrics are captured per remote method invocation. The above performance metrics enable developers and administrators to optimize their programming code for performance. Performance metrics are preferably further sent to a processing unit for storage, analysis, and correlation.
Owner:DYNATRACE
Load test system and method
An improved system and method for load testing software applications is provided. The user interface and / or application calls are captured to generate a script to emulate a user session. The script may include source language statements and, with or without editing, may be compiled into an executable script. Multiple scripts may be executed on a script driver to simulate multiple users to load test a system.
Owner:IBM CORP
Systems and methods for website monitoring and load testing via simulation
ActiveUS20060276997A1Raise the level of abstractionSimple processNuclear monitoringHardware monitoringWeb siteOperational system
Described herein are systems and methods for website or web based application monitoring and load testing. A server is configured to execute monitoring or load testing agents on various agent devices that are placed in various locations across a network. The agents receive a playback script from the server and execute the script to simulate a user session that is part of a website monitoring or load testing project. Execution of the playback script may cause the agent to send commands to a generic browser application that in turn carries out those commands. Alternatively, or in combination, execution of the script may cause the agent to simulate operating system commands such as mouse, keyboard, and voice commands. The results of the script execution by the agent are stored and sent back to the server for potential real time alerting notification and compilation into a related report. Methods for recording the playback scripts are also provided.
Owner:SECURITY SERVICES LLC
Load test simulator
Systems and methodologies are provided for load testing a server wherein user characteristics are adjusted dynamically during the testing period of the server, based upon weightings defined in a user profile. Such dynamic adjustment enables a distribution of user characteristics as a percentage of total requests, (e.g. a per iteration model). The user characteristics can include type of user activities on a web page (e.g. search, browse, check out), browser features (e.g. browser type, browser version) net work connections, various client / server hard ware / software configurations and the like.
Owner:MICROSOFT TECH LICENSING LLC
System and method for load testing a web-based application
A computer-based method for load testing a web application. The computer-based method comprises selecting one or more uniform resource locator (URL) parameters, identifying the selected parameters by parameter type, and loading the web application with URLs created by randomly generating the selected URL parameters. An electronic system adapted to load test a web application utilizing random parameter generation.
Owner:HEIN HENRI
Concurrent connections performance testing system and method for file system
ActiveCN102035697AUnderstand the actual situationIncrease profitData switching networksSystem under testTask management
The invention discloses a concurrent connections performance testing system and a concurrent connections performance testing method for a file system. A master control node and at least one testing node are arranged, wherein the testing node is arranged on an application server of a storage system, is mainly used for simulating an application load to test a tested system, is connected with the tested file system through a storage network, and is used for testing the tested system; and the master control node performs centralized management which comprises process scheduling and task management on the testing node through a local area network, and is used for performing centralized management on all testing nodes and counting a test result. The system comprises a parameter processing module, a tested system information collecting module, a system initialization module, a condition monitoring module, a distributed management module, a load testing module, a result counting and reporting module and a system recovery module, solves the problems that the concurrent connections of the file system are not definitely defined and a detailed and useable testing method is lacked in the prior art, and is particularly suitable for the concurrent connections performance test of a distributed file system.
Owner:NO 15 INST OF CHINA ELECTRONICS TECH GRP
Load testing mechanism for server-based applications
InactiveUS20090271152A1Easy to controlAccurate trackingDigital computer detailsNuclear monitoringApplication softwareComputer science
In various exemplary embodiments, a method of monitoring performance of a server and a related computer-readable medium include one or more of the following: placing a load agent on at least one server; maintaining a load on the server using the load agent, wherein the load corresponds to at least one predetermined performance parameter of the server; monitoring the at least one predetermined performance parameter on the server; and gathering performance information while the load agent is monitoring the server. In various exemplary embodiments, the performance parameters include CPU usage, memory usage, network load, and disk performance. Thus, various exemplary embodiments enable a precise determination of the effect on application requests received by the server when the server is under a specific load.
Owner:ALCATEL LUCENT SAS
Session template packages for automated load testing
A computer-implemented method includes scanning a clip of messages that includes message requests and message responses arranged in a sequence. The scanning is performed based on one or more search parameters and produces a list of one or more name / value pairs. The clip is utilized to perform a load test on a target website. Each name / value pair has a corresponding value. For each name / value pair in the list a message request in the clip is identified where the corresponding value is first used. Then, looking backwards in the sequence from the message request where the corresponding value is first used, prior message responses are located where the corresponding value is found. An extraction point is specified in the clip for the corresponding value as a latest message response in the sequence where the corresponding value was returned from the target website. The corresponding value is then stored as a property.
Owner:AKAMAI TECH INC
Intelligent power grid load testing and recognition method based on steady state and transient state characteristic joint matching
ActiveCN103105556AMake up detectionMake up identificationElectrical testingData acquisitionSmart meter
The invention discloses an intelligent power grid load testing and recognition method based on steady state and transient state characteristic joint matching. A typical intelligent power grid load is selected to conduct the data collection and feature analysis, and a load characteristic data base is established; user power consumption data are obtained through an intelligent electric meter in an intelligent power grid end-user circuit breaker layer; a collection data line is preprocessed, and power utilization switch events are detected; the switch events are conducted with clustering by utilizing clustering algorithm, and each cluster corresponds to a kind of start-stop behavior of an electricity load; the clustered switch events are conducted with load recognition; a recognition result is conducted with result checking by utilizing steady state harmonic current feature analysis, and the recognition result is updated. The intelligent power grid load testing and recognition method based on the steady state and transient state characteristic joint matching can detect the type and the service condition of load equipment on the basis that the normal operation of an intelligent power grid and normal use for a user are not affected, not only contributes to the load side management of the intelligent power grid, but also is beneficial to strengthening demand side management and has great significance for achieving optimizing configuration of electric power resources and the load.
Owner:XI AN JIAOTONG UNIV
Static force load testing device for concrete beam
InactiveCN103776685AEasy to monitorMeet the test requirementsStrength propertiesConcrete beamsTransducer
The invention discloses a static force load testing device for a concrete beam. The device comprises a base (1), a crossbeam (2), and an upright post (3) provided with an external thread, wherein the upright post (3) is respectively fixedly connected with the base (1) and the crossbeam (2) in a manner of screw-thread fit; a hydraulic jack (6), a load transducer (8) and a load allocation beam (7) are sequentially mounted on the bottom surface of the crossbeam (2); first spherical hinges (10) used for transmitting load to the concrete beam (19) are respectively arranged at the two ends of the bottom surface of the load allocation beam (7); an adjusting hole (5) is formed in the top of the base (1); the base (1) is fixedly connected with a support seat (9) used for supporting the concrete beam (19) through the adjusting hole (5); a second spherical hinge (11) is arranged at the top of the support seat (9); a linear displacement sensor used for detecting the deformation of the concrete beam (19) is mounted on the base (1); the hydraulic jack (6) is used for applying the load to the concrete beam (19), and a computer (16) is used for analyzing and processing acquired signals so as to monitor the test process; the crossbeam (2) and the support seat (9) are regulated to adapt to load tests of concrete beams of different sizes; the overall device can be dismounted and mounted, and is convenient to store and transport.
Owner:ANHUI & HUAI RIVER WATER RESOURCES RES INST +1
Device for testing composite asphalt pavement interlayer shear fatigue, and method thereof
ActiveCN102519808ASimple structureEasy to operateMaterial strength using steady shearing forcesRoad surfaceEngineering
The invention discloses a device for testing composite asphalt pavement interlayer shear fatigue, and a method thereof. According to the present invention, a skew shearing experiment is adopted to determine the composite asphalt pavement interlayer shear fatigue lives under different temperature conditions. The device comprises a loading bar, a load testing system, a pressing block, a supporting block and a support platform, wherein the pressing block and the supporting block are provided with a concave part, when the loading rod loads, a specimen requiring test is positioned in a space formed by docking of the two concave parts. The testing method is: placing the specimen in the supporting block and the pressing block, loading on the specimen through a testing machine to generate the skew shearing failure to obtain the maximum failure load, and carrying out the shear fatigue experiment under the repeated load effect according to 0.2-0.8 times the maximum failure load. The device and the method are simple and easy to operate, the actual stress state of the composite asphalt pavement can be accurately simulated, and the important significances are provided for the designs and the evaluations of the composite asphalt pavement interlayer shear property and the interlayer structure and material, and the design of the asphalt layer thickness.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Enterprise integration test tool
A system for load testing an integrated enterprise computer system is provided. The system uses a forecast that predicts future use of the integrated enterprise computer system. The forecast maintains a predicted volume of transactions and a predicted mix of transactions for the integrated enterprise computer system. The system includes an application list that details front-end applications of the integrated enterprise computer system. The application list identifies whether the front-end applications will participate in the load testing. The system further includes a generator to generate a test data file having transactions randomly used by scripts to test the integrated enterprise computer system. The generator produces the test data file using the predicted volume and mix of transactions maintained by the forecast and based on the front-end applications participating in the load test. A method for load testing using the test data file is also provided.
Owner:SPRINT CORPORATION
Transmission system load signal testing, analyzing and processing method of wheel-type loader
InactiveCN101788398AEasy to analyzeGuaranteed accuracyMachine gearing/transmission testingMechanical machines/dredgersComputer moduleWorking environment
The invention discloses a transmission system load signal testing, analyzing and processing method of a wheel-type loader; the transmission system load signal testing of the wheel-type loader is completed by a transmission system load signal testing module; a signal acquisition device and a recorder which are mutually connected form the transmission system load signal testing module; load signal analysis and processing are completed by a load signal analyzing and processing module, and the load signal analyzing and processing module analyzes and processes the load signal recorded by the recorder; the method solves the problems of transmission system load on-line actual measurement and load testing signal processing of the wheel-type loader, reduces the interference of pseudo-signals with load spectrum generation as possible, realizes the truth of the transmission system load spectrum, uses the transmission system load spectrum in the virtual test of the power performance optimization design of the wheel-type loader so that the precision is close to the real working environment of the loader, greatly shortens the performance testing time of the wheel-type loader, and improves the optimization design precision.
Owner:HUAIYIN INSTITUTE OF TECHNOLOGY
Fast load testing device and method for chloride ion migration coefficient of concrete
InactiveCN102564916AAvoid compressive stress reductionSimple structurePermeability/surface area analysisSustained loadTest sample
The invention discloses a fast load testing device and method for a chloride ion migration coefficient of concrete. An elastic connecting piece in a state of compression is adopted for exerting a sustained load on a concrete sample and the concrete sample loaded with sustained stress is subjected to an electric accelerating chloride ion migration test to calculate the chloride ion migration coefficient of the concrete sample in the state. According to the invention, the fast load testing device and method for the chloride ion migration coefficient of the concrete aim at the problems that the conventional testing device for the chloride ion migration of the concrete can not exert a load on a tested sample and consequently can neither imitate the actual loaded state of in-service concrete nor determine the chloride ion migration coefficient of the concrete under sustained load; sustained and stable pressure is exerted on the concrete sample in longitudinal direction by the resilience of the elastic connecting piece; and the reduction of pressure stress caused by the creep of the concrete sample when a tensioning screw is used for exerting load can be avoided, so that the influence of the sustained load on the permeability of the chloride ions of the concrete can be researched.
Owner:HOHAI UNIV
A high-precision instrumented indenter and a method for calculating the indentation depth of a diamond indenter
InactiveCN102288500AElimination of influences on indentation depth measurementsGuaranteed accuracyElectric/magnetic depth measurementInvestigating material hardnessComputer control systemProbe type
Owner:ACADEMY OF ARMORED FORCES ENG PLA
Protocol sleuthing system and method for load-testing a network server
ActiveUS7111204B1Error detection/correctionMultiprogramming arrangementsNetwork serviceNetwork testing
A protocol sleuthing system according to the present invention for load testing a network server includes a computer configured to interconnect with the network server, a protocol engine stored in and implemented by the computer and operative to generate a plurality of synthetic users, to generate a synthetic transaction in accordance with a specified protocol, and to cause each of the plurality of synthetic users to sequentially implement a plurality of the synthetic transactions with the network sever for load testing thereof, a configuration file connected to the protocol engine that includes variables required to generate the synthetic transaction, information that defines the behavior of the plurality of synthetic users implementing the synthetic transaction, and information that defines the number of synthetic users to be created by the protocol engine, and a module that is operative to monitor each of the plurality of synthetic transactions implemented by each of the plurality of synthetic users with the network server, to detect any error event occurring during any of the plurality of synthetic transactions implemented by any of the plurality of synthetic users, and to report any error event detected during such network testing.
Owner:KEYSIGHT TECH SINGAPORE (SALES) PTE LTD
Testing system for loads of frequency converters
The invention provides a testing system for loads of frequency converters, which comprises a power supply transformer, at least one testing module and a controller. The power supply transformer outputs at least one power supply voltage, each testing module comprises at least one frequency converter to be measured and a load testing cabinet, each load testing cabinet is used as a variable load to adjust output of the corresponding frequency converter to be measured and outputs corresponding alternating-current voltage to an output end of the power supply transformer, the controller controls the magnitude of the load testing cabinet of each testing module when the load testing cabinet is used as the variable load, and accordingly the output of the frequency converters to be measured is adjusted by the aid of the load testing cabinets. A three-phase reactor is directly disposed at an output end of each frequency converter to be measured so as to realize filtering processing, and accordingly a running mode of each frequency converter with a motor load is simulated. In addition, the frequency converters with different voltage grades can be loaded and tested under the condition without the motors, residual electric energy is fed back to the output end of the power supply transformer to be recycled, and accordingly energy is saved.
Owner:DELTA ELECTRONICS SHANGHAI CO LTD +1
Tri-axial bending load testing jig
InactiveUS20060137465A1Effective strengthAccurate measurementMaterial strength using steady bending forcesEngineeringTest fixture
A tri-axial bending load testing jig includes a die including first and second supporting axes which upholds opposite sides of a board material, the first and the second supporting axes movable so that an interval therebetween can be adjusted according to a size of the board material, a punch mounted at an upper part of the die movable in a vertical direction to press down a center portion of the board material, a punch setting unit formed in the center of the die to set the center and parallelism of the punch with respect to the first and the second supporting axes and having a punch groove for receiving the punch at the center portion of the die, and a material positioning unit guiding a position of the board material to be put on the first and the second supporting axes, according to the size of the board material.
Owner:SAMSUNG ELECTRONICS CO LTD
Method for determining satellite navigation signal quality evaluation parameters
ActiveCN103278825AMeeting the Needs of Payload TestingWide coverage of indicatorsSatellite radio beaconingSignal qualityPhase deviation
The invention provides a method for determining satellite navigation signal quality evaluation parameters. The satellite navigation signal quality evaluation parameters comprise Gabor bandwidth, error vector magnitude (EVM), amplitude error, phase error, pseudo-code consistency, phase deviation, phase loss, S curve offset and delay stability. By changing an ideal pseudo-code generating mode, common spread spectrum signals such as binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK) can be evaluated, various special navigation signals such as binary offset carrier (BOC), alternate binary offset carrier (AltBoc), time division alternate binary offset carrier (Td-AltBoc) and time multiplexed binary offset carrier (TMBOC) can be evaluated; and by the high-precision evaluation of pseudo-code phase and carrier phase, each evaluation item of the navigation signals can be highly precisely evaluated, and the requirement on navigation satellite effective load testing can be met.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
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