Design And Implement Of The Hardware Circuits For High-performance Hand-held Satellite Navigation Receiver

High performance hand-held satellite navigation receiver is one of most important equipments of Compass system. At present, the new generation Compass satellite navigation system is under construction. In order to promote the building of the system as soon as possible, bring strong military and economic benefits, there exists an urgent need to develop and produce large amounts of fully functional user equipment with advanced technology and reliable quality.Under the background of a national key model project, this paper studied the hardware architecture design of high-performance hand-held satellite navigation, discussed the key technologies of receiver sensitivity, frequency planning, ADC optimal quantization level, AGC dynamic range and other factors which affect on receiver overall performance. Furthermore, the paper analyzed the signal integrity and electromagnetic compatibility and completed a detailed hardware design.The content of this dissertation shows as follow:(1) Drew a detailed comparison about performance, design complexity and implement cost of three different receiver architectures, implemented a small size, low power, high-performance hand-held satellite navigation receiver based on navigation-signal processing Application Specific Integrated Circuit (ASIC) and ARM processing platform and Super Heterodyne architecture. In addition, power management strategy for the hand-held receiver was proposed.(2) Studied receiver sensitivity, frequency planning, ADC optimal quantization level, AGC dynamic range which are key technologies impact hand-held receiver hardware design; Derived the RF front-end design noise figure based on analysis of receiver sensitivity; derived the frequency planning design, achieving transition bandwidth nearπ3 in the digital domain of the IF signal, which provides more flexibility of the hardware design. ADC IF signal input power directly affects the sensitivity and receivable signal power range of the hand-held receiver, based on the optimal quantization level interval analysis, the thesis calculated optimal ADC quantization level and verified by measurement, designed the AGC dynamic range based on the needs of receiving weak signals in hand-held receiver.(3) Based on transmission line theory, the paper put forward a design method for hand-held receiver signal integrity and electromagnetic compatibility, based on the analysis of the characteristics of the signal edge, obtained maximum radiation bandwidth of high-speed clock signals. Using Hyperlynx software combined with the IBIS signal integrity simulation model, aiming at electromagnetic compatibility problems occurred during the design and implementation of hand-held receiver, the paper gives PCB design general principles of signal integrity and the electromagnetic compatibility.(4) Designed and implemented the high-performance hand-held satellite navigation receiver's hardware circuit and gave the test results which show that hand-held receiver has been fully applied to meet the design requirements.