基于动态载波AM算法参量阵的DSP设计与实现

Design and implementation of Parametric Array based on Dynamic Carrier AM Algorithm Using DSP

摘要:

为了解决普通AM参量阵产生的解调信号质量差、效率低等问题,设计了一个动态载波AM算法。以此算法为基础设计了一个DSP处理平台,并在此平台上实现了参量阵系统。经过系统硬件和软件两方面的优化设计,保证了算法运行的实时性和稳定性。最后,使用500Hz、800Hz和1100Hz的合成波作为测试信号,测试了系统输出的波形和参量阵前方5米处的频谱。对比测得的波形和理论波形,验证了此系统能够可靠地运行。对比普通AM和动态载波AM参量阵输出信号的频谱图,验证了动态载波AM参量阵能输出更好信噪比和能量更高的解调信号。

Abstract:

In order to solve the problems of poor quality and low efficiency demodulation output signal of common AM algorithm parametric array, a dynamic carrier AM algorithm was designed. Based on this algorithm, a DSP process platform was designed which implemented parametric array. Real-time and stability of system have realized by optimal hardware design and software design. Finally, using composite signal of 500Hz、800Hz and 1100Hz as the test signal, we got the wave of system output and signal’s spectrum 5 meters ahead of parametric array. By comparing with the measured waveform and theoretical waveform, the system is verified to be reliable. And the fact was verified that the output signal of dynamic carrier AM parametric array has better SNR and higher output power by comparing with the dynamic carrier AM parametric array’s signal spectrum and common AM parametric array’s signal spectrum.