Decode-and-forward relaying based on orthogonal complementary codes

  • Yazar/lar KIZILIRMAK, Refik Çağlar
  • Yayın Türü Makale
  • Yayın Tarihi 2015
  • DOI Numarası 10.3906/elk-1304-55
  • Tek Biçim Adres http://hdl.handle.net/20.500.12498/4760

In this note, we propose a full-duplex decode-and-forward cooperative diversity scheme based on code division with orthogonal complementary codes. We consider a simple case in which a single user is assisted by a single relay to achieve cooperative diversity. When the cooperation is full-duplex, the operational delay of the relay makes the channel asynchronous and this may cause multiple-access interference (MAI) between the user and relay. The orthogonal complementary codes have perfect autocorrelation and cross-correlation properties that provide MAI-free operation in asynchronous channels. In the proposed scheme, the user and relay terminals spread their messages with complementary codes and the spread messages can reach the destination without interfering with each other. The numerical results reveal that the proposed scheme reaches the same bit-error-rate performance in both synchronous and asynchronous channels. The results are also compared with the conventional orthogonal code sets, such as Hadamard sets, which fail to provide diversity.

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ISSN
(dc.identifier.issn)
1300-0632
Eser Adı
(dc.title)
Decode-and-forward relaying based on orthogonal complementary codes
Özet
(dc.description.abstract)
In this note, we propose a full-duplex decode-and-forward cooperative diversity scheme based on code division with orthogonal complementary codes. We consider a simple case in which a single user is assisted by a single relay to achieve cooperative diversity. When the cooperation is full-duplex, the operational delay of the relay makes the channel asynchronous and this may cause multiple-access interference (MAI) between the user and relay. The orthogonal complementary codes have perfect autocorrelation and cross-correlation properties that provide MAI-free operation in asynchronous channels. In the proposed scheme, the user and relay terminals spread their messages with complementary codes and the spread messages can reach the destination without interfering with each other. The numerical results reveal that the proposed scheme reaches the same bit-error-rate performance in both synchronous and asynchronous channels. The results are also compared with the conventional orthogonal code sets, such as Hadamard sets, which fail to provide diversity.
Yayın Tarihi
(dc.date.issued)
2015
Kayıt Giriş Tarihi
(dc.date.accessioned)
2020-08-07T14:18:58Z
Açık Erişim tarihi
(dc.date.available)
2020-08-07T14:18:58Z
Yayın Dili
(dc.language.iso)
eng
Yayın Türü
(dc.type)
Makale
Yazar/lar
(dc.contributor.author)
KIZILIRMAK, Refik Çağlar
Tek Biçim Adres
(dc.identifier.uri)
http://hdl.handle.net/20.500.12498/4760
DOI Numarası
(dc.identifier.doi)
10.3906/elk-1304-55
Atıf Dizini
(dc.source.database)
Wos
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