Measurement And Test System For UMTS

In today's world telecommunication plays a key role in our modern life. It is on anoutgoing upgrade, day after day new functions emerge and new tools are added to thisinfrastructure before we elaborate more on its functions and its set up I would like to takethe readers to a key element called TESTING. The purpose of this research is to shed light on testing 3G technology, we haveselected the UMTS, " WCDMA", as sample for the research. We will cover all the majortesting components starting by the terrestrial radio access (UTRA), quality of servicemanagement, signal generator, and direct conversion receivers. The GSM networks have a global footprint that provides access to mobile services,such as voice, circuit-switched and packet-switched data, short message service (SMS)and multimedia messaging service (MMS). A third-generation mobile terminal equippedwith both WCDMA and GSM technology would put the end-user in contact withseamless, (practically) worldwide, mobile service with more convenient functions thatexist on the GSM networks. As such the testing of the UTRAN is critical before anyinter-working mechanism between the WCDMA and GSM technologies is achieved. The handover between the WCDMA system and the GSM system has been one of themain design criteria taken into account in the WCDMA frame timing definition. TheGSM-compatible multi-frame structure, with the super-frame being multiple of 120 ms,allows similar timing for intersystem measurements as in the GSM system itself.Moreover, the compatibility in timing is important, so that when operating in WCDMAmode, a multimode terminal is able to catch the desired information from thesynchronization bursts in the synchronization frame on GSM carrier with the aid of afrequency correction burst. This way the relative timing between a GSM and WCDMAcarriers is maintained similar to the timing between two asynchronous GSM carriers fromhere comes the importance of the handover testing. The perception of the end users is a key element to define the success of the UMTSsystem in general. As such, two aspects need to be considered;the ability of a network toprovide an assured service level, and how satisfied the end user is with the service, interms of usability, accessibility, retain-ability and integrity of the service. This factenhances a major topic, denoted by Quality of Experience (QoE), reflects the collectiveeffect of service performances that determines the degree of satisfaction of the end user.UMTS is a digital, fully-duplex-capable mobile communication system. As a duplexmode for the separation of the two Transmission directions, either the FrequencyDivision Duplex mode (FDD) or the Time Division Duplex mode (TDD) can be applied.The main challenge for a signal source is to cover all measurement applications with onesolution. As such we have covered the signal measurement into four main tests, physicalperformance test, spectral measurements test, data level measurements test, and responsetest.The last part of the research covers the receiver design which is intended to meet theindustry requirements for high integration, low power, and low cost, while also meetingall WCDMA RF system performance requirements. A design margin was provided toaccommodate expected operating voltage, temperature, and fabrication process variations.It describes the key system performance requirements derived from the WCDMAspecification and provides detailed descriptions of the design and measured performanceof the receiver circuits.