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The test is based on an RF connection, where one timeslot is permanently used on the dmu300 and downlink with packet-switched channel coding being active. The following non-redundant quantities are calculated on the basis of a comparison of this vector with the computed ideal signal vector: From the difference between the two quantities the cmj300 difference trajectorya regression line is calculated using the mean square error method.
Test and measurement solutions for user equipment UE and networks significantly help to ensure that the introduction of HSDPA runs smoothly.
Any work arounds for using the clear wire… - Apple Community
The display mode and the UE-ID for detailed measurement results can be selected during the measurement as well as after the measurement is stopped. The HARQ process will be terminated then. This technology is controlled More information.
All other trademarks are the property. In contrast to the CDEP, the error is analyzed at the chip level, so that errors are shown as a function of time on the basis of the chip offset from the selected CPICH slot.
Such indication may be visual or by an audio signal, or both, depending on user definition. The available hardware options include a highly accurate, oven-controlled crystal? Capturing starts right after the user starts the measurement.
How does it work? In the center section, the CDP of a selected code is displayed as a function of time.
Instructor Class Description
Test of signaling channels For conformance tests, the? Depending on the display mode, the bar graph shows current, average, minimum or maximum values.
CMU-K75 Software option for? The network operator gains valuable information on how to further improve HSDPA coverage and the quality of service.
TS V7. This is a simple way of providing the transmitter signal modulated with pseudorandom bits required for spectrum and power measurements.
CMU Universal Radio Communication Tester_图文_百度文库
The instrument can be easily adjusted to the DUT by means of four flexible N connectors. The test setup is similar to the one used for circuitswitched channels. In this mode, the tester operates synchronously to the BTS, i.
To use this website, you must agree to our Privacy Policyincluding cookie policy. Pseudo-random bit streams The tester uses a choice of four true pseudo-random bit sequences for BER measurement.
The instrument can be synchronized to the base station in the following ways: Radio environment conditions have a direct impact on the data rates achieved. Many expansions to the tester may be installed on site.
Modulation analysis For modulation analysis, the actual modulation vector of the signal received from the base station is measured over the complete burst and stored. This simplifies ,ac test setup. The common pilot channel CPICH is used as a reference for the different measurement results because it is not time-delayed displayed on the first scale.
The test setup of the RACH test must reflect the conditions of the real network, i. With 8PSK modulation the time axis is scaled in symbol points.
The idea is to keep the data received during the first transmission and to ask for additional information in case any errors have been detected. To optimally support the desired services, every network operator must customize this parameterization. Capturing starts when the specified start UE ID is detected the first time. The information applies to the following:
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