Frequency Synthesizer In The Gsm Mobile Phone Tester Research And Design,

GSM Mobile Station Test Set is used to measure some important parameters of GSM handset, such as signal quality and functional performance, which resembles a Base Station sub-system. The frequency synthesizer that this thesis introduces is the sub-system of the whole GSM Mobile Station Test Set. It can produce carriers that GMSK's modulation and demodulation need, supporting all the three frequency bands, i.e., GSM9000/1800/1900, and the standard 13MHz frequency for GSM base-band processing. Considering all the advantages of the Phase Locked Loop (PLL) frequency synthesizer, PLL frequency synthesize is used in this design. Based on the theory of PLL and frequency synthesize technology, this thesis provides the project of system design in which a new PLL synthesize technology ───fractional synthesize is utilized, and describes the hardware architecture and software implementation in detail. The organization of this thesis is as follows. The background and main work of this thesis is introduced in chapter 1. In chapter 2, an overview of frequency synthesize is provided. In chapter 3, the mechanism of PLL, as well as the linear performance analysis of PLL and the filtering of noise are detailed in this chapter. In chapter 4, the detail of the project of GSM Mobile Station Test frequency synthesizer is provided, including the hardware architecture and software implementation. Last, in chapter 5, some summarizations and prospect for this task is given. In addition, this frequency synthesizer can also be applied to the GSM base station and GSM cell phone, and is instructive for the frequency synthesizer of the incoming 3G.