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Wcdma System Power Control And Transmit Diversity Algorithm For Fpga Implementation Research

Posted on:2003-04-19Degree:MasterType:Thesis
Country:ChinaCandidate:Q F MengFull Text:PDF
GTID:2208360065451059Subject:Circuits and Systems
Abstract/Summary:PDF Full Text Request
In this dissertation, the realization of algorithm of power control loop and closed transmit diversity with FPGA (Field Programmable Gate Array) has been presented. The algorithm's analysis and discuss, the function verification and performance test are also been discussed. In addition, the FPGA design flow and the technique of synchronous circuit design have been depicted.The module of power control is a very important part in WCDMA system. It can decide the covering scope and capability of system. The aim of power control is to adjust the transmit power fast according to mobile environment, so it can make the communication quality keep on a certain level and not make too much disturb on other users. In this dissertation, we have designed the module of forward link power control, which can achieve all the function the protocol proposed. According the result of test, the performance of the module can meet the requirement of system guideline. In order to reduce resource consuming and make timing manage well, in module designing, we deal with all the forward channels in pipeline kind.The transmit diversity is also an important part in the WCDMA system. The main aim of this function is to make the receiving effect well without enlarge the total transmit power. In this dissertation, we mainly pay attention to closed transmit diversity. The realizing precision of this algorithm will directly affect the result of receiver. The main theory of closed transmit diversity is to adjust the signal's phase and amplitude of master and diversity antennas according to the feedback information. In order to make the realization easier and more precision, we use a simple multiplication of complex value to realize the phase adjustment. To amplitude adjustment realization, we use power address offset in the power table. Through the actual test, the module can meet the system requirement.Because all the project is designed at the base of FPGA device and synchronous circuit design technique, some common knowledge about FPGA, FPGA design flow and some key points of synchronous circuit design technique are introduced in this paper.
Keywords/Search Tags:closed transmit diversity, power balance, power raise limited, compressed mode, SSDT-Site Select Diversity Transmit, CLPC-Closed Loop Power Control, OLPC-Open Loop Power Control
PDF Full Text Request
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