Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

Iterative demapping for QPSK modulation

Iterative demapping for QPSK modulation

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

Buy article PDF
£12.50
(plus tax if applicable)
Add to cart
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)
Add to cart

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:
 
 
 
 
 
Electronics Letters — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

© IEE
Published

The authors present an iterative decoding scheme which is particularly suited for quadrature phase shift keying (QPSK) modulation with anti-Gray mapping. At the receiver, a soft demapper accepting a priori information and a convolutional decoder are applied in a serial concatenation. Numerical results are presented for QPSK in additive white Gaussian noise and Rayleigh-fading channels. The iterated system applying anti-Gray mapping outperforms the conventional system using Gray mapping after only one iteration.

Inspec keywords: fading; Rayleigh channels; quadrature phase shift keying; white noise; decoding; convolutional codes; iterative methods; Gaussian noise

Other keywords: iterative demapping; QPSK modulation; a priori information; decoding scheme; serial concatenation; anti-Gray mapping; soft demapper; Rayleigh-fading channels; quadrature phase shift keying; convolutional decoder; additive white Gaussian noise

Subjects: Interpolation and function approximation (numerical analysis); Codes

References

    1. 1)
      • Berrou, C., Glavieux, A., Thitimajshima, P.: `Near Shannon limit error-correcting coding and decoding: Turbo-codes', Proc. ICC'93, May 1993, p. 1064–1070.
    2. 2)
      • Robertson, P., Villebrun, E., Hoeher, P.: `A comparison of optimal and sub-optimal MAP decoding algorithms operatingin the log domain', Proc. ICC '95, June 1995, p. 1009–1013.
    3. 3)
      • Robertson, P.: `An overview of bandwidth efficient turbo coding schemes', Int. Symp. on Turbo Codes, September 1997, Brest.
    4. 4)
      • Moher, M.L.: `Turbo-based multiuser detection', Proc. IEEE Int. Symp. on Inf. Theory, June 1997, Ulm.
    5. 5)
      • Hagenauer, J.: `The turbo principle: Tutorial introduction and state of the art', Symp. on Turbo Codes, September 1997, Brest, France.
    6. 6)
      • C. Douillard , A. Picart , P. Didier , M. Jezequel , C. Berrou , A. Glavieux . Iterative correction of intersymbol interference: Turbo-equalization. ETT , 5 , 507 - 511
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19981059
Loading

Related content

content/journals/10.1049/el_19981059
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
Print this page
This is a required field
Please enter a valid email address