Digital communications with emphasis on data modems theory, analysis, design, simulation, testing, and applications by Middlestead, Richard W.

Available for University of the Philippines Diliman College of Engineering via IEEE Xplore. Click here to access
Also available remotely for University of the Philippines Diliman College of Engineering via IEEE Xplore. Click here to access thru EZproxy

Minimizing spurious tones in digital delta-sigma modulators by Hossieni, Kaveh

Available for University of the Philippines Diliman via SpringerLink. Click here to access

QPSK, IJF-OQPSK and XPSK a comparative evaluation by Castillo, Rajah K.J.C

Precise frequency generation with digital modulation using direct digital synthesis by Ong, Johann L.

Error control systems for digital communication and storage by Wicker, Stephen B.

Introduction to trellis-coded modulation, with applications

Digital phase modulation by Anderson, John B. 1945-

Optimal oversampling using probabilistic error modeling in low-power digital energy detection receivers by Santos, Christopher G.