Xiang Lijuan

The chaotic signal design for MIMO radar

The study of multiple-input multiple-output (MIMO) radar has received much attention from researchers in recent years. It has many advantages over conventional phased radar in many ways such as anti-intercept of radar signal, low velocity target detection, and resolution. The signal design is an important problem for radar which decides the performance of radar. In this paper, the chaotic signal is employed to the MIMO radar application. Some preprocessed method is employed to make the signal has small Crest Factor (CF), large bandwidth. Some simulation is presented to show efficiency of proposed method.

Study on Water-Cooled Solar Semiconductor Air Conditioner

Water-cooled solar semiconductor air conditioner was designed. Relevant calculation was made to determine the rooms cooling load, which export the solar panels and battery capacity, followed by selection of CNC matcher. Development work also involves interior refrigerator, which used semiconductor refrigeration chip as the core cooling. The air cooled chiller functions by ways of the water cycle at the hot end and the forced air cooling at the cold end. To test the performance of the entire refirgeration system, a dedicated computer measuring & control system was developed. Test showed that the COP value of the solar semiconductor refrigeration system was close to 1.0.

The Optimized Solar-Powered LED Lighting System in Gas Stations

In accordance with the specifications for the design of the gas station lighting system, the original lighting system was transformed into the overall solar-powered LED lighting system. The original lighting was replaced by using the same illumination LED lamps. Calculations were made to determine the optimum tilt angle of solar components. Based on the reasonable LOLP rate, solar module and battery capacity were also measured. Conductance increment algorithm was employed to achieve the tracking of photovoltaic cells on the maximum power point. The solar LED lighting system could be automatically switched seamlessly with the general municipal power, featured with superior explosion-proof performance, protection performance and a significant energy-saving effect.

A New Detection Method for MIMO Radar Using Hidden Markov Model

MIMO radar is a new radar technique developed recently. It can achieve better detection performance than conventional phased radar. Based on the scattering statistic of clutter and man-made target, we propose that hidden Markov models (HMM) can be used to model the clutter and target signals, and that the HMMs can be used to detect target. Simulation results verify its efficiency.

A novel signal processing method for MIMO radar based on channel estimation

Multiple Input Multiple Output (MIMO) radar is a new radar technique. It has many advantages over conventional phased radar in many ways such as anti-intercept of radar signal, low velocity target detection, and resolution. The signal transmit matrix of MIMO radar has much information such as target angle. In this paper, we analyze the signal model for MIMO radar. And then we present a new method to estimate the target angle from the matrix. At last, we show the efficiency by some simulations.

Wavelet based signal for MIMO radar

Multiple Input Multiple Output (MIMO) radar can effectively improve radar performance by transmitting specially designed orthogonal signals. In this paper, the orthogonal wavelet division multiplexing is used because of their prominent properties such as favorable ambiguity function and high bandwidth efficiency. The signal design flow is presented in this paper.