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Figure 7. 31 (a) The modulating signal m(t)
Figure 7.31 (a) The modulating signal m(t). (b) PSK: the modulated signal m(t) cos ωct. (c) FSK: the modulated signal. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure 7.32 PSD of (a) ASK, (b) PSK, and (c) FSK.
Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure 7. 33 (a) Noncoherent detection of FSK
Figure (a) Noncoherent detection of FSK. (b) Coherent detection of FSK. Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure 7.34 Coherent binary PSK detector (similar to a DSB-SC demodulator).
Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure 7.35 (a) Differential encoding; (b) encoded signal; (c) differential PSK receiver.
Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure 7.36 Binary FSK symbols in the two-dimensional orthogonal signal space.
Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure 7.37 M-ary PSK symbols in the orthogonal signal space: (a) M = 2; (b) M = 4; (c) M = 8.
Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure 7.38 (a) QAM or quadrature multiplexing and (b) 16-point QAM (M = 16).
Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure P.7.3-6 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure P.7.3-7 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure P.7.4-2 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure P.7.4-3 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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Figure P.7.8-1 Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc.
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