Irregularities in the Earth's ionosphere can make the amplitude and phase of radio signals fluctuate rapidly, which is known as ionospheric scintillation. Severe ionospheric scintillation could affect the performance of the Global Navigation Satellite System (GNSS). Currently, the Multiple Phase Screen (MPS) technique is widely used in solving problems caused by weak and strong scintillations. ...

This page intentionally contains only this sentence. vii Gutta cavat lapidem. A drop of water hollows a stone. This page intentionally contains only this sentence. ACKNOWLEDGMENTS This thesis is the outcome of three years of hard work, deep and enthusiastic love for my job, research and innovation. It is also the outcome of the collaboration, the support, and the help of many teachers, colleagu...

Based on the software platform of MATLAB simula-tion, the paper collects the real GPS intermediate frequency (IF) signal by the IF signal sampler, and uses it to carry out the time-domain correlation acquisition and the fast Fourier transform (FFT) acquisition on the C/A code of GPS signal, and also carry out the decision of the singlebinary search and the M/N search on the personal computer. T...

Radio receiver, as an extensively feasible modern technology, has been widely applied in all fields of military and civil. It is mainly to demodulate all kinds of required signals with strong interference and noise. Based on intermediate frequency (IF) software radio receiver test platform, the data transmission approach combining direct memory access (DMA) and multichannel buffered serial port...

To communicate at the nanoscale, researchers have proposed molecular communication as an energy-efficient solution. The drawback to this solution is that the histogram of the molecules’ hitting times, which constitute the molecular signal at the receiver, has a heavy tail. Reducing the effects of this heavy tail, inter-symbol interference (ISI), has been the focus of most prior research. In thi...

This paper considers the detection performance of a serial thresholding receiver for preceded bina~ GMSK signal with BT=O. 5. The conditional symbol (biij error probability of the GMSK signal with carrier phase and timing errors is derived and compared to that of unfiltered BPSK. It is shown that the GMSK signal has practically the same performance as the ideal BPSK signal in the absence of syn...

In this paper, we propose a neural network based receiver for GNSS applications in which multipath fading is present. The proposed system is implemented in the framework of rake receivers, but it does not require any knowledge of the attenuation values of each path. In addition, we propose an algorithm able to update the receiver parameters in a fully unsupervised way. Such an algorithm allows ...

Mimetic species have evolved to resemble other species to avoid predation (protective mimicry) or gain access to food (aggressive mimicry). Mimicry systems are frequently tripartite interactions involving a mimic, model and 'signal receiver'. Changes in the strength of the relationship between model and signal receiver, owing to shifting environmental conditions, for example, can affect the suc...

Neural receiver structures have been developed for adaptive discrete-signal detection in telecommunication applications. Neural networks combined with conventional equalizers improve the performance especially in compensating for nonlinear distortions. These distortions may result, for instance, from nonlinear ampliication implemented for reducing the power consumption. In this paper, the behav...

Global Positioning System (GPS) signal tracking algorithms have been developed using the concepts of Kalman filtering and smoothing. The goal is to improve phase estimation accuracy for non-real-time applications. A bit-grabber/software-receiver has been developed for the GPS L1 coarse/acquisition signal. The bit grabber down-converts, digitizes, and stores the raw RF signal. The software recei...