Analysis Techniques for the Power Spectral Density Estimation of Convolutionally Coded Impulse Radio UWB Signals Subject to Attenuation and Timing Jitter

• Published in: IEEE transactions on vehicular technology Vol. 58; no. 3; pp. 1355 - 1374
• Main Authors: Villarreal-Reyes, S., Edwards, R.M.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.03.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Amplitude modulation; Applied sciences; Attenuation; Coding, codes; Convolution; Convolutional codes; Density; Encoders; Exact sciences and technology; FCC; Impulses; Information, signal and communications theory; Modulation; Modulation, demodulation; power spectral density (PSD); Pulse modulation; Radio; Signal analysis; Signal and communications theory; Signal representation. Spectral analysis; Signal, noise; Spectra; Spectral analysis; spectral shaping; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Timing jitter; Transmission and modulation (techniques and equipments); Ultra wideband technology; Ultrawideband; ultrawideband (UWB) impulse radio (IR); Convolutional codes; spectral analysis; spectral shaping; power spectral density (PSD); ultra wideband (UWB) impulse radio (IR); Random signal; Multiplication; Pulse position modulation; Wide band signal; Spectrum analysis; Pulse amplitude modulation; Time hopping communication; Impulse; Direct sequence; Timing jitter; Radio wave; ultrawideband (UWB) impulse radio (IR); Convolutional code; Coding circuit; Power spectral density; Pulse modulation; Ultra wide band; Random sequence; Signal analysis; Pulse shape; Radio communication
• ISSN: 0018-9545; 1939-9359
• DOI: 10.1109/TVT.2008.926619

A method for the spectral analysis of convolutionally coded Markov-driven impulse radio (IR)-based ultrawideband (UWB) systems is introduced. Example applications in UWB systems include the study of pulse position modulation (PPM), pulse-amplitude modulation (PAM), biorthogonal modulation, and pulse-shape modulation combined with periodic (e.g., pseudorandom)/random time-hopping (TH), as well as periodic/random direct-sequence (DS) multiplication. The effects of random jitter and pulse attenuation are considered in this analysis. The final result allows simple examination of the power spectral density (PSD) of such signals. This result clearly delimitates the relative contributions of parameters that allow enhanced design of UWB systems. Application examples are presented for a new convolutional encoder, providing a spectral-line-free PSD for quaternary biorthogonal (PAM/PPM) modulation IR UWB systems.