Orthogonal signal in communication

1. What is orthogonal signal in communication?
2. What are orthogonal signals?
3. How do you know if a signal is orthogonal?
4. Why are orthogonal signals important?

What is orthogonal signal in communication?

In general, a signal set is said to be an orthogonal set if (s_k,s_j) = 0 for all k ≠ j. A binary signal set is antipodal if s₀(t) = −s₁ (t) for all t in the interval [0,T]. Antipodal signals have equal energy.

What are orthogonal signals?

Orthogonal signals are used extensively in the communications industry. They range from a simple sine/cosine quadrature signals to multiple signals whose inner product is equal to zero. Orthogonal signals can be used for several different applications.

How do you know if a signal is orthogonal?

Two signals are orthogonal if 〈y(t),x(t)〉 = 0. (Pythagorean Theorem). If signals x(t) and y(t) are orthogonal and if z(t) = x(t) + y(t) then Ez = Ex + Ey. x(t)y(t)dt = 0.

Why are orthogonal signals important?

Orthogonal signals are used extensively in communications because they can be received and demodulated as separate data streams with very little interference between the orthogonal signals.