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Spectrum sharing via interference tolerant transform domain waveform design

Spectrum sharing via interference tolerant transform domain waveform design

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This chapter focuses on the application of spectral diversity via transform domain (TD) waveform design instead of the traditional time domain formulation. The basic idea behind TD waveform design is to address interference at the transmitter and thereby minimize signalprocessing complexities at the receiver [3]. This approach is generalized within the spectrally-modulated-spectrally-encoded (SMSE) framework and includes all multicarrier waveform designs such as orthogonal frequency division multiplexing (OFDM) and multicarrier code-division multiple access (MC-CDMA) [4,5] as special cases. These multicarrier SMSE waveforms are utilized in the design of overlay and underlay cognitive radio waveforms. The vast majority of existing research on physical layer spectrum coexistence addresses cognitive radio systems, where the focus is mainly on the sharing of spectrum between multiple communication systems [2,6,7]. In this chapter, we introduce the foundational work for a transform domain communication system (TDCS) and SMSE framework, and then discuss the design of multicarrier communication and radar waveforms based on SMSE.

Chapter Contents:

  • 14.1 Introduction
  • 14.2 Foundations and framework
  • 14.2.1 Transform domain communication system
  • 14.2.1.1 Multiple access in TDCS
  • 14.2.1.2 TDCS receiver
  • 14.2.2 SMSE framework
  • 14.3 SMSE-based overlay multicarrier communication waveforms
  • 14.3.1 OFDM via SMSE
  • 14.3.2 TDCS via SMSE
  • 14.4 SMSE-based multicarrier radar waveforms
  • 14.5 Coexistence of radar and communications
  • 14.5.1 Scenario 1: Communication coexistence with narrowband emissions
  • 14.5.2 Scenario 2: Radar coexistence with narrowband emissions
  • 14.5.3 Scenario 3: Radar/Communication coexistence with narrowband emissions
  • 14.6 Looking ahead
  • References

Inspec keywords: cognitive radio; radio receivers; radiofrequency interference; radio spectrum management; radio transmitters; diversity reception

Other keywords: traditional time domain formulation; spectrum sharing; OFDM; interference tolerant transform domain waveform design; TD waveform design; multicarrier waveform designs; SMSE framework; multicarrier code-division multiple access; underlay cognitive radio waveforms; orthogonal frequency division multiplexing; MC-CDMA; spectral diversity; cognitive radio systems; signal-processing complexities minimisation; spectrally-modulated-spectrally-encoded framework; physical layer spectrum coexistence

Subjects: Electromagnetic compatibility and interference; Radio links and equipment; Radio and television receivers

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