20. The system of claim 18 , wherein the word classifiers are configured to produce word decision data by utilizing a Hidden Markov Model.
18. The system of claim 13 , wherein the digital signal processors are further configured to convert the vocalization Doppler signals to an acoustic vector, articulator vector, and a speech energy vector for each wavelength utilized by the radar sensor in detecting the body motions of the speaker; create a separate feature vector for each wavelength based on a concatenation of a vector of information derived from the acoustic vector, articulator vector, and the speech energy vector; create a joint feature vector based on a combination of the acoustic vectors, articulator vectors, and the speech energy vectors of each wavelength; and transmit the feature vectors to the word classifier.