Introduction (chapter objectives) Bit error rate for binary systems (unipolar, polar, bipolar, ooK, BPsK, FsK, and MSK Output signal-to-noise ratio for analog systemS(AM, SSB, PM, and Fm)
Introduction Frequency-selective fading is a dominant impairment in mobile communications Fading reduces receive signal-to-noise ratio and degrades the bit-error-rate(BER) Frequency selectivity of the channel, i. e, delay spread, induces inter-symbol interference(ISI) To combat frequency-selective fading
Ideal response Want Ideal Response to Signal -usuall straight-line function Actual response is determined by values of control factors and noise factors If noise factors are suppressed early, the en difficult problems only appear late Introduce noises early C Don Clausing 1998