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With the continuous development of satellite navigation technology, on the basis of the original BOC signal that the AltBOC signal is proposed, which is applied in Galileo system and Compass system. Yet, inaccurate acquisition problem is also caused by the multi-peaks characteristic of AltBOC signal auto-correlation function. And the inter-modulation components and the plural form of subcarrier modulation...
Presently GPS L1 frequency band operated at 1575.42 MHz is used for navigation purpose of the civilian. New GPS signals L2C and L5 are introduced as modernization step over the existing conventional L1 signal. This new signal structure implies new receiver structure for acquisition, tracking and data demodulation. A software defined GPS receiver can be implemented for L5 band GPS signal. This paper...
The rational enterprise decision makers tradeoff between returns and risks. Customer portfolio paradigm is a favorable tools to increase the value of customer base and reduce its risks. After analyzing the similarities and differences of the financial assets and customer equity, a customer portfolio optimization model is proposed. In this model, semi-variance is employed as the risk metrics considering...
In order to predict the price of candidates in acquisition and evaluate its feasibility, this paper puts forward a model of price prediction of candidates based on support vector machine. The model is trained by the data of market deals which were made in the past. The result of simulation and test indicates that average error of prediction is percent 7.71. It also proves that SVM has better performance...
Acquisition is the key function modules of the baseband system of satellite navigation receiver. In the GNSS receiver for GPS, GLONASS and Beidou, in order to acquire the three navigation signals at different chip rates and frequency, three FFT processors are needed when using the parallel search based on FFT. GNSS receiver can choose best navigation system according to the signal strength of different...
Signal quantization levels can have significant impact on the performance of a GPS receiver, especially in the present of the interference. In this paper, signal quantization model for estimating interference suppression of the correlator output and evaluating the performance of GPS receiver is presented. With the proposed model, performance of the receiver in acquisition process is demonstrated by...
Knowledge is acquired information in forms of data, behavior, experience, and skills retained in memory through learning. This paper presents the nature of human knowledge, its mathematical model, and its manipulation by concept algebra. The taxonomy of knowledge and its hierarchical abstraction model of knowledge are investigated. Mathematical models of knowledge and its manipulation by concept algebra...
The authors previously (1987) reported on the structure, design, specifications, and applications of their infrastructure for clinical research in the field of electrocardiographic body surface potential mapping. They summarize the main characteristics of the hardware (acquisition, storage and display) and the software (data processing, display, analysis, and mathematical modelling). The various features...
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