SOFT QUANTIZER FOR FM RADIO BINARY DIGITAL SIGNALING

摘要

A soft quantizer for assigning numerical weights to hard quantized output bits of a binary digital detector in a digital receiver based on the noise energy level of the received baseband data. An analog signal, derived from the discriminator noise level, is digitized by an analog to digital converter for use as an address to look up predetermined numerical weights for soft quantized values in a memory table. The addressed numerical weights are combined with the hard quantized output bits of the digital detector to generate soft quantized data values.