Cooperative Demodulation by Link Adaptive Relaying

سال انتشار: 1390
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,105

فایل این مقاله در 5 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

ICEE19_466

تاریخ نمایه سازی: 14 مرداد 1391

چکیده مقاله:

In cooperative communication systems, the decodeand- forward (DF) relaying is a practically attractive strategy. Existing techniques for mitigating the error propagation in this scheme can be classified into two groups: the first of these uses link SNRs to evaluate the reliability of the data received by the relay and the second approach is to develop better combining schemes at the destination. In this paper, a combination of both methods has been proposed. The purpose of this work is obtaining performance gain by the degree of freedom in the relay. So the power scaling coefficients in the relay are proposed that give a better performance in comparison with Cooperative MRC (C-MRC). Also a suitable combiner is used in the destination that is a generalization of C-MRC and is an approximation of ML detector. We show the advantage of the new proposed scheme through simulations and analytical analysis in which the coding gain is utilized as a performance metric to compare cooperative detectors. A power scaling coefficient in the relay is proposed that is independent of instantaneous SNR at source-relay link and has a surprising gain when the relay is located close to the source. It is demonstrated that in high SNRs, the average BER of the new relaying scheme with this coefficient almost achieves a lower bound.

نویسندگان

Mostafa Azhini

Signal Processing and Communication Systems Laboratory, School of Electrical and Computer Engineering,University of Tehran, Tehran, Iran

مراجع و منابع این مقاله:

لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :
  • A. Sendonaris, E. Erki and B. Aazhang, :User cooperation diversity-part ...
  • D. Chen , N. Laneman, : Modulation and demodulation for ...
  • T. Wang, A. Cano, G.B. Giannakis and J.N. Laneman, ، ...
  • T. Wang, G.B. Giannakis and R. Wang :Smart cooperative ...
  • c Ommu nications' , IEEE Trans. Commun, Vol. 56, No. ...
  • Z. Yi, I. Kim, "Diversity order analysis of the decode-and- ...
  • F. A. Onat et al "Threshold selection for SNR-based selective ...
  • نمایش کامل مراجع