Required bandwidth, unwanted emission, and data power efficiency for residual and suppressed carrier systems-a comparative study

Author

Nguyen, Tien M. ; Martin, Warren L. ; Yeh, Hen-geul

Author_Institution

Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA

Volume

37

Issue

1

fYear

1995

fDate

2/1/1995 12:00:00 AM

Firstpage

34

Lastpage

50

Abstract

This paper presents a new concept for required bandwidth along with a method for computing this bandwidth and the associated undesired emission for the classes of PCM/PSK/PM, PCM/PM and BPSK signals. The PCM/PSK/PM signals considered here employ either a square wave or sine-wave subcarrier with NRZ data format. On the other hand, the PCM/PM and BPSK signals use either a Bi-phase or an NRZ data format. Furthermore, the maximum allowable required bandwidth in the presence of noise and the data power efficiency for these modulation schemes will also be investigated. The term “data power efficiency” as considered in this paper consists of two principal components, namely, the amount of power contained in the data channel, and the symbol signal-to-noise ratio (SSNR) degradation due to the presence of intersymbol interference (ISI) for a specified required bandwidth. This paper evaluates both of these components numerically for the modulation schemes considered and the results are then compared. Furthermore, the impact of baseband filtering on the required bandwidth is also investigated in this paper

Keywords

filtering theory; frequency allocation; intersymbol interference; noise; phase modulation; phase shift keying; pulse code modulation; space telemetry; BPSK signals; Bi-phase data format; NRZ data format; PCM/PM signals; PCM/PSK/PM signals; bandwidth; baseband filtering; data channel; data power efficiency; intersymbol interference; modulation schemes; noise; residual carrier systems; sine-wave subcarrier; square wave subcarrier; suppressed carrier systems; symbol signal-to-noise ratio degradation; unwanted emission; Bandwidth; Baseband; Binary phase shift keying; Degradation; Filtering; Intersymbol interference; Optical signal processing; Phase change materials; Phase shift keying; Signal to noise ratio;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.350238

Filename

350238