Design And Implementation Of Receiver For Multi Modulation Mode And Radio Frequency Fingerprint Extraction System

With the progress of satellite communication technology,satellite communication plays an irreplaceable role in the field of people’s livelihood and military defense.The common single carrier modulation modes of satellite signal include MPSK,MQAM and MAPSK.Therefore,modern satellite receiver needs to support multiple modulation modes of demodulation to adapt to more complex communication application situations.On the other hand,As an effective means of physical layer security authentication of satellite communication,individual identification is often based on the time domain and wavelet domain characteristic parameters of the signal fingerprint recognition.In fact,there are many fingerprint features that can be used as classification recognition in the demodulation process.Therefore,this thesis focuses on a receiver compatible with multiple modulation modes to complete the demodulation of multiple modulation modes.At the same time,the RF fingerprint characteristic parameters are extracted from the modulation domain to achieve efficient individual emission source identification.The specific research content of this thesis is as follows:First of all,for the multi-mode receiver of non-cooperative signals,this thesis studies the traditional demodulator scheme,which adopts non-data-aided plans assisted timing recovery,carrier synchronization and equalization to achieve the demodulation of MPSK,MQAM and MAPSK signals.Improved timing error extraction algorithm makes it suitable for various signal modulation modes.At the same time,this thesis analyzes the performance of timing recovery,carrier synchronization and equalization algorithm.In AWGN channel,the maximum difference between the bit error rate of the receiver designed by this thesis and the theoretical demodulation bit error rate is less than 1dB.At the same time,this thesis considers the implementation complexity and performance of the algorithm,and designs the specific hardware implementation structure.Secondly,according to the designed multi-mode receiver,this thesis studies in radio frequency fingerprint that can be extracted from the receiver,and proposes a new characteristic parameter based on timing synchronization loop.Based on the influence of radio frequency devices on signals,this thesis completed a simple modeling of radio frequency fingerprints in baseband,and analyzed the classification and recognition rates from single dimensional feature and multi-dimensional features.The classification recognition rate of the variance of timing synchronization decimal error proposed in this thesis can reach 90% under 9dB.Finally,this thesis completed the design and implementation of the communication system,and built a verification test platform based on the RF sending equipment and FPGA,to analyze the quality of the signal received by the receiver,and test the classification and recognition ratio based on the single and multi-dimensional radio frequency fingerprint.