A new multipath channel transformation technique
TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES, cilt.20, sa.5, ss.679-694, 2012 (SCI-Expanded, Scopus, TRDizin)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 20 Sayı: 5
- Basım Tarihi: 2012
- Doi Numarası: 10.3906/elk-1012-941
- Dergi Adı: TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
- Sayfa Sayıları: ss.679-694
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
A new channel transformation technique is introduced in this paper The technique is employed on the receiver side and has 2 filters. The first filler is the inverse complex conjugate of the estimated channel. The profile of this filter's output is triangular. The taps of the second filter are calculated according to the output of the first filter to produce an exponentially decreasing profile. This technique transforms most channel profiles to exponentially decreasing channel profiles. Thus equalizers adopting the proposed technique may have better bit error rates and lower computational complexity on frequency-selective channels. This paper evaluates the efficiency of the proposed technique on a sequential channel equalizer in different channel conditions and modulations to compare the results with others reported in the literature. Computational complexity and bit error rates under different circumstances are provided. The channel transformation technique exhibits performance levels close to the optimum results of the Viterbi algorithm and proves to be a useful tool for equalizers.