Referring to (5.68), it is sometimes desirable to leave a residual carrier component in a PSK-modulated waveform
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Find α so that 10% of the power of xPSK (t) is in the carrier (unmodulated) component. (Use cos (u + v) to write XPSK (t) as two terms, one dependent on d (t) and the other independent of d (t). Make use of the facts that d (t) = ± 1 and cosine is even and sine is odd.)
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Related Book For
Principles of Communications Systems, Modulation and Noise
ISBN: 978-8126556793
7th edition
Authors: Rodger E. Ziemer, William H. Tranter
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