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Faz Bozulmalı Ortamlarda Turbo Kafes Kodlamalı Sistemler

Turbo Trellis Coded Modulation (TTCM) with Imperfect Phase Reference

Journal Name:

  • Istanbul University Journal of Electrical & Electronics Engineering

Publication Year:

  • 2001

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this paper, we investigate the performance of Turbo Trellis Coded Modulation (TTCM) over AWGN, and Rician channels and assume that phase disturbance is available. As we know Turbo Trellis Coded Modulation (TTCM) is similer to binary turbo codes, but employs Trellis Coded Modulation (TCM) codes which include multi-dimensional codes. The combination of turbo codes with trellis codes leads to a strigthforward encoder structure, and allows iterative decoding as binary turbo decoder. However, iterative Turbo Decoder needs to be adapted to the decoding of TCM codes. Here, we investigate TTCM for 8PSK for several Rician parameter K and effective signal-to-noise ratio in the carrier tracking loop a. Thus, our results will reflect the degredations both due to the effects of the fading on the amplitude of the received signal and of a noisy carrier reference.
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Abstract (Original Language): 
Bu makalede Turbo Kafes Kodlamalý (TKK) sistemlerin AWGN ve Rician ortamlarda faz bozulmasý durumunda hata baþarýmý elde edilmiþtir. TKK yapýsý ikili Turbo modülasyonu gibidir ancak TKK çok boyutludur. Turbo kodlamanýn Kafes Kodlama ile birlikte kulanýmý kodlayýcý yapýsýnýn deðiþimini gerektirir. Alýcýda ise ikili kodlayýcýlarda olduðu gibi iteratif kod çözücü yapýsý vardýr. Burada 8PSK modülasyonda TKK farklý Rician katsayýsý K, faz bozulma katsayýsý a için benzetim sonuçlarý elde edilmiþtir. Elde edilen sonuçlar hem genlikte hem de faz daki bozulmayý içermektedir.
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REFERENCES

References: 

[1] BERROU, C., GLAVIEUX, A., THITIMASJSHIMA,
P.(1993), ‘Near Shannon-limit error correcting coding and
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[2] ROBERTSON, P., WÖRZ,T.,(1998), ‘Bandwidth-efficient
Turbo Trellis -coded modulation using punctured component
codes’ IEEE J., SAC, 16(2).
[3] BLACKERT, W.,WILSON, S.,(1996), ‘Turbo Trellis coded
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CISS’96.
[4] UCAN, O. N,(1999),’Trellis coded quantization /modulation
over mobile satellite channel with imperfect phase
reference’ International Journal of Satellite
Communications, 16, 169-175.
[5] UCAN, O. N., OSMAN, O.,GUMUS,
A.,(2000),’Performance of Turbo coded signals over partial
response fading channels with imperfect phase reference”
IEEE 43.Midwest Symposium on Circuits and Systems
MWSCS’2000, Michigan.

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