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Genetic algorithm analysis TSP
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Application background Genetic algorithm (GA) is a random search method to solve optimization problems. It uses in biological evolution of natural selection and genetic (i.e., survival of the fittest) rules.Algorithm steps (basic genetic algorithm)Step 1 random initialization pop_size chromosome.Step 2 with the crossover algorithm to update the chromosome.Step 3 with the mutation algorithm to update the chromosome.Step4 Calculation of the target value of all chromosomes.Step 5 according to the target value calculation of the fitness of each chromosome 6 through the roulette method to select the chromosome.Step7 repeat second to sixth steps until the termination condition satisfies the.Step 8 output of the best chromosome as the optimal solution.In favor of the genetic algorithm, we first need to solve the problem of encoding, encoding solution known as chromosomes. For constrained optimization problem, genetic algorithm is in the chromosome of the operation, and the
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Design of digital distortion meter
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Application background The distortion degree is an important parameter of the radio signal, which is a signal to the degree of deviation from the pure sinusoidal signal. In the measurement of radio measurement, many parameters are involved in the measurement of distortion. For example: on the surface of the test voltage and power meter and digital AC voltage meter, in order to reduce different detection instrument of the waveform error and improve the testing accuracy, we must reduce the distortion of the signal source.Based on FPGA development board (DE2-115) and AD/DA (THDB-ADA), using FFT method, the method, the design and Simulation of digital distortion meter is implemented in II QUARTUS environment. The experimental results of the sinusoidal signal, Fang Bo signal, triangular wave signal have high accuracy, and can display the distortion degree in LCD.
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Pulse compression processing based on linear frequ
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Application background Pulse compression processing based on linear frequency modulation signalFamiliar with debugging environment - hardware and softwareFPGA development based on VerilogHDL languageDebugging based on ChipScopeIntermediate frequency sampling of signalQuadrature demodulation based on multi phase filterSignal FIR filtering operation system integrationIn this experiment, the FPGA ADC is a computer controlled by USB3.0 to control the ARM in the LMK04808 to configure the ADC chip sampling frequency. (the IF sampling rate).First, the USB3.0 project is downloaded to the development board, and then through the USB3.0 configuration LMK and AD4249 chip, the specific operation in the FPGA of the manual (based on the realization of the ADS4294) in detail. Design Tool Clock file (corresponding to the 20M sampling frequency) through the my2.exe to load the LMK and AD4249 chip, and then use the signal generator to generate a 1M si
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Random signal processing linear FM pulse signal
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Application background Linear FM pulse signal, when the width of 10us, the bandwidth of 543MHz, the signal after matching filter, that is, pulse compression processing, processing gain is how much? What is the pulse width after pulse compression? And the pulse width of the pulse compression is used to explain the relationship between the range resolution and the bandwidth of the 3dB.It is suggested that the pulse width of the pulse signal and the linear frequency modulation pulse signal matched with the rectangular pulse signal is compared with that of the linear frequency modulated pulse signal. The pulse width of the pulse is changed, and the compression ratio is 3dB. In addition, the signal-to-noise ratio of the signal to noise ratio of the signal to noise ratio of the signal to noise ratio of the signal to noise ratio is not promoted by the simulation of the noise.
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