Hızlı sönümlemeli kanallarda yeni bir uzay-zaman-frekans kodlamalı OFDM sistem tasarımı
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Dosyalar
Tarih
2004
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IEEE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Bu çalışmada, frekans seçici hızlı sönümlemeli kanallarda telsiz iletişim için bir uzay-zaman-frekans çeşitlemesi yöntemi önerilmiştir. Önerilen yöntem, OFDM tekniğini kullanarak frekans seçici kanalı uygun hale getirdikten sonra sırasıyla dik uzay-frekans ve dik uzay-zaman blok kodlama uygulayarak uzay-zaman-frekans çeşitlemesi sağlamaktadır. Elde edilen sistemin başarımını arttırmak üzere sisteme uygun bu kafes kodlama tekniği araştırılmış ve uygun kafes yapısının oluşturulması için yeni kriterler ortaya çıkarılmıştır. Oluşan sistemin başarımını, bilgisayar benzetimleriyle incelenmiş ve var olan yöntemlerle karşılaştırılmıştır.
This work is concerned with a transmitter diversity technique for wireless communications over frequency selective fading channels. The proposed technique utilizes orthogonal frequency division multiplexing (OFDM) to transform a frequency selective fading channel into multiple flat fading subchannels on which space-frequency processing is first applied and then additional space-time coding is applied in order to increase the diversity. In order to improve the performance of the system, a convenient trellis coding scheme is investigated and design criteria are established. Performance of the proposed space-time-frequency OFDM (STF-OFDM) transmitter diversity technique has been examined by computer simulations and compared with existing schemes.
This work is concerned with a transmitter diversity technique for wireless communications over frequency selective fading channels. The proposed technique utilizes orthogonal frequency division multiplexing (OFDM) to transform a frequency selective fading channel into multiple flat fading subchannels on which space-frequency processing is first applied and then additional space-time coding is applied in order to increase the diversity. In order to improve the performance of the system, a convenient trellis coding scheme is investigated and design criteria are established. Performance of the proposed space-time-frequency OFDM (STF-OFDM) transmitter diversity technique has been examined by computer simulations and compared with existing schemes.
Açıklama
Anahtar Kelimeler
Block codes, Communication channels (information theory), Computer simulation, Computer simulationFading (radio), Diversity reception, Fading, Fading channels, Fast fading channels, Frequency diversity, Frequency selective channels, OFDM, OFDM modulation, Orthogonal frequency division multiplexing, Signal encoding, Space time adaptive processing, Space time codes, Space time coding, Space time frequency coded systems, Space-frequency processing, Space-time block coding (STBC), Space-time codes, Space-time coding, Space-time-frequency coded system, Space-time-frequency OFDM, Transmitter diversity, Transmitter diversity technique, Transmitters, Trellis coded modulation, Trellis codes, Trellis coding scheme, Wireless communication, Wireless telecommunication systems
Kaynak
Proceedings of the IEEE 12th Signal Processing and Communications Applications Conference, SIU 2004
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
Sayı
Künye
Oğuz, O., Aygölü, H. Ü. & Panayırcı, E. (2004). A novel space-time-frequency coded system design for OFDM over fast fading channels. Paper presented at the Proceedings of the IEEE 12th Signal Processing and Communications Applications Conference, 68-71. doi:10.1109/SIU.2004.1338259
