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Q<br />

Sec. 3–4 Digital Signaling 159<br />

s(t)<br />

5V<br />

T<br />

T 0 =3T<br />

t<br />

(a) A Three-Bit Signal Waveform<br />

5<br />

p 1<br />

(t)<br />

5<br />

T<br />

p(t)<br />

5<br />

T<br />

p 2<br />

(t)<br />

2T<br />

3T<br />

t<br />

(b) Bit Shape Pulse<br />

t<br />

5<br />

T<br />

2T<br />

p 3<br />

(t)<br />

3T<br />

t<br />

T<br />

2T<br />

(c) Orthogonal Function Set<br />

3T<br />

t<br />

w 3<br />

w 2<br />

5 T<br />

d = (1, 0, 1)<br />

s = Q5 T, 0, 5 T<br />

5 T<br />

5 T<br />

w 1<br />

(d) Vector Representation of the 3-Bit Signal<br />

Figure 3–11<br />

Representation for a 3-bit binary digital signal.

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