Spectral Characteristics of M-ary Code Shift Keying Based Impulse Radios: Effects of Code Design

This paper analyzes the power spectral density (PSD) characteristics of ultra wideband (UWB) signals modulated by M-ary code shift keying (MCSK) that can be combined with binary pulse position modulation (BPPM) and binary pulse amplitude modulation (BPAM), which we refer to as MCSK based impulse rad...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2007-06, Vol.6 (6), p.2266-2275
Main Authors: Erkucuk, S., Dong In Kim
Format: Article
Language:English
Subjects:
Amplitude modulation
Applied sciences
Density
Exact sciences and technology
FCC
Fluctuations
Impulses
Information technology
Infrared radiation
Keying
Modulation coding
Multiple access
Pulse modulation
Radio
Retarding
Signal design
Smoothing methods
Spectra
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Ultra wideband communication
Ultra wideband technology
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Summary:This paper analyzes the power spectral density (PSD) characteristics of ultra wideband (UWB) signals modulated by M-ary code shift keying (MCSK) that can be combined with binary pulse position modulation (BPPM) and binary pulse amplitude modulation (BPAM), which we refer to as MCSK based impulse radios (IR). MCSK based IR are modified IR that were designed to increase the data rate of conventional IR by embedding the data on a time hopping (TH) code randomly selected from a set of M distinct TH codes per user. This random selection also results in increased effective TH code period, which- helps smoothing the continuous spectrum and suppressing the discrete spectral components. In combination with the random code selection, design of the TH code set for each user is very important for spectrum shaping and multiple access (MA) capability, and is addressed in detail in the paper.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2007.05804