http://iet.metastore.ingenta.com
1887

The spectrum crunch – a radar perspective

The spectrum crunch – a radar perspective

For access to this article, please select a purchase option:

Buy chapter PDF
£10.00
(plus tax if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
Radar and Communication Spectrum Sharing — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

This chapter has provided an introduction to the spectrum crunch problem from a radar perspective. At one level it can be said that the problem is already severe. There is ever-greater competition for a resource that is strictly finite, and radar is only one voice among many pressing their case. All users have a need for greater bandwidth, and the only thing that can be said with certainty is that the problem is only going to get worse.Yet if spectrum usage were measured at a given point as a function of frequency, time, space and polarisation, it would certainly be found that the spectrum is currently not being used that efficiently. There is therefore great potential for approaches aimed at using the spectrum in a more efficient and dynamically controlled manner. The regulatory framework has thus far taken a relatively conservative approach. However, it is important to have a proper quantitative understanding of the effect of interference of one service upon another in order to adopt appropriate regulation measures, rather than taking the view that no service should ever occupy the same part of the spectrum as any other. To date, a number of novel radar technology approaches have been introduced, including improvements to the spectral purity of transmitters, intelligent, cognitive approaches to dynamic frequency allocation, passive sensing based on the emissions of other RF applications, and even through learning to mimic the behaviour of echolocating animals. These topics and others are developed in the chapters that follow, and give some cause for optimism that a solution can be found.

Chapter Contents:

  • 2.1 Introduction
  • 2.2 The radar spectrum environment
  • 2.3 Signal spectra
  • 2.3.1 Spectra of practical emissions
  • 2.3.2 Radar emissions
  • 2.3.3 Radar transmitters
  • 2.4 Spectrum allocation
  • 2.4.1 Competition for spectrum
  • 2.4.2 Spectrum regulation
  • 2.5 Radar interference to other users
  • 2.5.1 Radar interference to other radars
  • 2.5.2 Radar interference to other systems
  • 2.5.3 WiMAX and LTE communication systems
  • 2.6 Interference to radar by other users
  • 2.7 Technology developments
  • 2.7.1 Passive bistatic radar
  • 2.7.2 Waveform diversity
  • 2.7.3 Bio-inspired approaches
  • 2.7.4 Cognitive radar
  • 2.8 Conclusions
  • Acknowledgements
  • References

Inspec keywords: signal detection; radar; cognitive radio; frequency allocation; radiofrequency interference

Other keywords: spectral purity; dynamic frequency allocation; spectrum crunch; passive sensing; echo-locating animals; interference; cognitive approaches; regulatory framework; transmitters; spectrum usage; radar perspective

Subjects: Signal detection; Radio links and equipment; Electromagnetic compatibility and interference; Radar equipment, systems and applications

Preview this chapter:
Zoom in
Zoomout

The spectrum crunch – a radar perspective, Page 1 of 2

| /docserver/preview/fulltext/books/ra/sbra515e/SBRA515E_ch2-1.gif /docserver/preview/fulltext/books/ra/sbra515e/SBRA515E_ch2-2.gif

Related content

content/books/10.1049/sbra515e_ch2
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address