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Braking force of multi-axle wheeled driving vehicle is different from that of traditional two-axle vehicle, as a result that the wheel lock sequence of the multi-axle vehicle should also be different from two-axle vehicle. The lock sequence of multi-axle vehicle bearing side-force was studied based on the running condition of braking and slipping. Finally the braking strategy and performance considering...
In this paper, Ultra wideband technology and the main features of indoor positioning technology is introduced, focusing on the design and establishment of a UWB-based indoor positioning system model, the transceiver structure of the system is determined, and then location algorithm, the receiver synchronization and channel estimation and other key technologies conducted in-depth study. On this basis,...
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 positioning system based on UWB.Analysis and implementation...
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. By combining orthogonal frequency-division multiplexing (OFDM) with multi-band, MB-OFDM systems can capture multi-path energy more efficiently...
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 of communication systems. A survey on indoor...
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 implementations of IFFT based on coordinate rotation...
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 codes for MB-OFDM-UWB system are designed...
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 principles and structure presented in detail...
Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) is a suitable solution to implementation of high speed data transmission in ultra wideband spectrum by dividing the spectrum available into multiple bands. The baseband of transmitter is one of the most important parts in MB-OFDM system. The structure of MB-OFDM system transmitter is introduced in this paper and the design of transmitter...
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