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3.1. Advantages of digital communication systems
3.2. Functional elements of a digital communication system
3.3. Digital modulator
3.4 Digital demodulator
3.5. Factors to consider in the desing of a digital modulator
3.6. Vector representation of signals
3.7. A basis in a vector space
3.8. Gram Schmidt orthogonalization procedure - An example
3.9. Alternative bases in a signal space