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During acquisition, the receiver detects the presence of desired satnav signals, obtains measurements and other information from the signals, and then computes and outputs an initial estimate of PVT with acceptable accuracy. Acquisition processing and performance depend critically on the state of the receiver at the beginning of the acquisition process. This chapter first defines a set of commonly...
This chapter details the operations performed at the receiver in order to apply detection as optimally as possible, in spite of the inter‐symbol interference introduced by distortion and asynchronicity. It is divided into separate sections: synchronization and equalization. The chapter first presents the different techniques implemented at the receiver so that it can acquire synchronicity parameters...
The technology behind programmable timer functions is explained and their importance in real time systems is justified. The advanced timer facilities provided by the STM32F4 ARM based embedded processor is summarised. The coding required to set up and utilise these subsystems is explained around some simple example applications. The concepts of timer triggering and time measurements are discussed...
Cell search is the first procedure the UE must undertake in order to access an LTE cell. By this procedure, the UE acquires time and frequency parameters needed in order to correctly demodulate the data: in particular, the symbol start position, the carrier frequency and sampling clock synchronization are acquired during this phase.
This chapter describes the details of the cell search procedure which...
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