ANALYTICAL MODELING AND SIMULATION OF PHASE NOISE IN BISTATIC SYNTHETIC APERTURE RADAR SYSTEMS

2006 ◽  
Vol 06 (03) ◽  
pp. L297-L303 ◽  
Author(s):  
WENQIN WANG
Keyword(s):  
Synthetic Aperture Radar ◽  
Phase Noise ◽  
Local Oscillator ◽  
Synthetic Aperture ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Noise Simulation ◽  
Low Pass ◽  
Bistatic Synthetic Aperture Radar ◽  
Aperture Radar

The requirement of phase noise imposed on the stable local oscillator for bistatic synthetic aperture radar (SAR) is much more severe than in the monostatic cases. So accurate phase noise simulation is of great importance during the design and development of bistatic SAR systems. This letter concentrates on the impacts of limited oscillator stability between bistatic transmitter and receiver, and presents an analytical model of phase noise that solves some drawbacks implicitly present in the previously proposed models. This model uses the Gaussian noise as the input of a hypothetical low-pass filter and its output is then considered as phase noise. Finally, some simulation results are provided to demonstrate the validity of this model.

scholarly journals A Novel Sample Based Quadrature Phase Shift Keying Demodulator

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Asraf Mohamed Moubark ◽  
Sawal Hamid Md Ali
Keyword(s):  
Phase Noise ◽  
Signal To Noise Ratio ◽  
Local Oscillator ◽  
Coherent Detection ◽  
Signal Frequency ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Incoming Signal ◽  
Shift Keying ◽  
Low Pass

This paper presents a new practical QPSK receiver that uses digitized samples of incoming QPSK analog signal to determine the phase of the QPSK symbol. The proposed technique is more robust to phase noise and consumes up to 89.6% less power for signal detection in demodulation operation. On the contrary, the conventional QPSK demodulation process where it uses coherent detection technique requires the exact incoming signal frequency; thus, any variation in the frequency of the local oscillator or incoming signal will cause phase noise. A software simulation of the proposed design was successfully carried out using MATLAB Simulink software platform. In the conventional system, at least 10 dB signal to noise ratio (SNR) is required to achieve the bit error rate (BER) of 10−6, whereas, in the proposed technique, the same BER value can be achieved with only 5 dB SNR. Since some of the power consuming elements such as voltage control oscillator (VCO), mixer, and low pass filter (LPF) are no longer needed, the proposed QPSK demodulator will consume almost 68.8% to 99.6% less operational power compared to conventional QPSK demodulator.

scholarly journals FOREIGN OBJECT DETECTION BASED ON CIRCULAR BISTATIC SYNTHETIC APERTURE RADAR

2013 ◽  
Vol 134 ◽  
pp. 301-322 ◽  
Author(s):  
Mojtaba Mohammadpoor ◽  
Raja Syamsul Azmir Raja Abdullah ◽  
Alyani Ismail ◽  
Ahmad Fauzi Abas
Keyword(s):  
Synthetic Aperture Radar ◽  
Object Detection ◽  
Synthetic Aperture ◽  
Foreign Object ◽  
Bistatic Synthetic Aperture Radar ◽  
Aperture Radar
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