Characterization of LMR Analog FM Audio Quality Using PL Tone Analysis

Estimation of Predetection SNR of LMR Analog FM Signals Using PL Tone Analysis

Ambiguity Function Analysis and Direct- Path Signal Filtering of the Digital Audio Broadcast (dab) Waveform for Passive Coherent Location (pcl)

This research presents an ambiguity function analysis of the digital audio broadcast (DAB) waveform and one signal detection approach based on signal space projection techniques that effectively filters the direct-path signal from the receiver target channel. Currently, most Passive Coherent Location (PCL) research efforts are focused and based on frequency modulated (FM) radio broadcasts and a...

Discrimination of Audio Signals Using Time-Frequency Distributions

Humans can discriminate speech from music easily in their mind without any influence of the mixed music. Due to the new techniques of analysis and synthesis of speech signals, the musical signal processing has gained particular weight, and therefore, the classical sound analysis techniques are used in processing music signals. Music art has a long and distinguished history. It goes back to the ...

Soft selection combining for terrestrial digital audio broadcasting in the FM band

Methods of adaptive soft combining and channel decoding are developed to combat the effects of multipath fading and nonuniform interference channels, with particular application to digital reception in hybrid in-band on-channel (HIBOC) digital audio broadcast (DAB) systems in the FM band. These systems transmit near CD quality digital audio and analog FM simultaneously within the same license b...

Hd R Adio C Overage M Easurement and P Rediction

Because of its unique digital transmission, HD Radio® requires new methods and standards to measure and predict signal coverage, relative to analog FM. Because analog FM reception quality is known to decline gradually with degraded RF signal quality, analog FM service may be quantified in simple terms of signal strength. With digital audio broadcasting, reception quality remains ‘perfect’ until...