| Summary: | 碩士 === 國立東華大學 === 電機工程學系 === 90 === The Wireless Local Loop (WLL) could not only provide the instant establishment, easy maintenance and mobility for users but also has the same quality as traditional phone. Personal Access Communication System (PACS) is one of the technologies for WLL and has become the standard of North American communication service since 1996. Because of the microcell architecture, its frequency reuse efficiency is higher. Consequently, its capacity is more than other cellular phone systems.
Utilizing computer simulation during the design period, we can promote the reliability of system and reduce the developing time. This thesis will use Symphony, the system design part of the Serenade 8.5 that was developed by Ansoft corp., to design a radio frequency circuit for 3.4GHz WLL transceiver based on PACS. In order to reduce any differences between simulation and implementation, we refer to some specifications of Monolithic Microwave Integrated Circuit (MMIC) and then adjust all parameters that were constructed by Symphony.
This circuit has already finished. The test results are as follows: Transmitter’s Error Vector Magnitude (EVM) is 5.93 % rms. Receiver’s Bit Error Rate is 2.5E-04, meanwhile its sensitivity is -95dBm. All results meet our requirements.
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