December 2011
Intermediate to advanced
436 pages
18h 7m
English
book
Real-Time Digital Signal Processing from MATLAB® to C with the TMS320C6x DSPs, Second Edition, 2nd Edition
by Thad B. Welch, Cameron H.G. Wright, Michael G. Morrow
Content preview from Real-Time Digital Signal Processing from MATLAB® to C with the TMS320C6x DSPs, Second Edition, 2nd Edition
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264 CHAPTER 16. PROJECT 7: BPSK DIGITAL TRANSMITTERS
Figure 16.7: commDSK waveform of a rectangular pulse shaped, 2400 bps signal.
the first phase reversal appears to occur at about 350 μs from the left of the display window.
An averaged spectrum associated with this waveform is shown in Figure 16.8. The main
lobe is centered at 12 kHz and the first spectral null above 12 kHz occurs at 14.4 kHz.
This implies that the main lobe is 4.8 kHz wide (twice the symbol rate), with subsequent
nulls occurring at 2.4 kHz spacing. The first side lobe has a relative magnitude that is
approximately 13 dB down from the main lobe’s peak. These are exactly the expected ...
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