Lu Xiaochun

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Multi-band orthogonal frequency division multiplexing (MB-OFDM) is a suitable solution to implementation of high speed data transmission in ultra wideband (UWB) spectrum by dividing the spectrum available into multiple bands. MB-OFDM system structure and transmitted signal is introduced in this paper. Channel models are fundamental to the study and design(More)
Precise indoor positioning is becoming increasingly important in commercial, military and public service applications for tracking people and asset. Ultra Wide Band (UWB) can provide high accuracy position with strong anti-jamming and low power consumption. It is very suitable for indoor positioning application. This paper will put emphasis on indoor(More)
The convolutional code cell is an essential part in a transmitter of multi-band orthogonal frequency division multiplexing ultra wide band (MB-OFDM-UWB) system introduced in this paper as a kind of useful channel coding to offer more protection against all kinds of channel noise under indoor channel environments. In this paper, some kinds of convolutional(More)
The co-channel interference is the most usual interference type of the UWB system, which effects the receive performance of the UWB system. In this paper, a corresponding path loss models based on the propagation feather of the UWB and co-channel interference signals is built, and an analysis method of the UWB co-channel interference based on the co-channel(More)
Integrated navigation system can help to solve the performance and application problems and limitations of the navigation equipment. Data fusion technology is one of the kernel parts in integrated navigation systems. In this paper, the current advances of this technology are introduced, with the architecture of a multi-sensor navigation system given and its(More)
The key technology in multi-band orthogonal frequency division multiplexing ultra wide band (MB-OFDM-UWB) system is inverse fast Fourier transforms (IFFT) which is used to implement OFDM modulation. However, the realization of multiplier with field programmable gate array (FPGA) in IFFT needs a large number of resources. This paper describes the(More)
Nowadays, multipath remains as an unsolved key problem for high precision applications, such as satellite navigation and position. Because GNSS broadcasted signals are subject to reflection and diffraction, just like any other type of electromagnetic waves, multipath is caused by the reception of direct signal together with the reflected or/and diffracted(More)
In this paper, a control method for making automated distributed management decisions is studied. And the consequences of externalized management on services and the system architecture is studied also. A simulation is performed to evaluate the suggested control method. The simulation results show that the automated manager needs 1) a system view(More)
In this paper, based on Anylogic6.0 simulation software, some simulation models of queuing systems with different queuing disciplines are established, including First Come First Service, Last Come First Service and Random Service. Compared with the theoretical values, the accuracy of the experiment data is verified. Finally, with Comparative Analysis of(More)
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