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根据快速滤波器组所具有的级联结构、良好频率选择性以及低复杂度的特点,提出了一种多通道同步接收机的设计方法来并行处理多路接收信号.该方法将最小化系统所需乘法器的总数量作为目标函数,以通带和阻带所允许的纹波作为约束条件,设计各级原型滤波器的脉冲响应系数,以满足接收机各通道全局设计指标的要求.以工作频率为88~108 MHz的调频广播信号并行解调系统作为仿真和实验平台对该方法进行验证.结果表明,所提出的设计方法能够满足多通道同步信号处理的要求,且每个通道所需乘法器的数量大约为加权重叠(WOLA)滤波器组方法所需乘法器数量的66.4%,具有较低的实现复杂度.
According to the characteristics of fast filter bank, such as cascade structure, good frequency selectivity and low complexity, a multi-channel synchronous receiver design method is proposed to process multiple receive signals in parallel. The total number of multipliers to be the objective function, the passband and stopband allowed ripple as the constraint, the design of the impulse response factor of the prototype filter at all levels to meet the requirements of the channel receiver global design specifications to work The frequency of 88 ~ 108 MHz FM broadcast parallel demodulation system as a simulation and experimental platform to verify the method.The results show that the proposed design method to meet the requirements of multi-channel synchronous signal processing, and each channel required multiplication The number of devices is approximately 66.4% of the number of multipliers required by the WOLA filter bank approach, with lower implementation complexity.