QCTP: A Novel Pre-Coding Approach for PAPR Reduction in IM/DD Systems

Cinemre I., HACIOĞLU G., Mahmoodi T.

IEEE Access, cilt.12, ss.115588-115596, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 12
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1109/access.2024.3446579
  • Dergi Adı: IEEE Access
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC, Directory of Open Access Journals
  • Sayfa Sayıları: ss.115588-115596
  • Anahtar Kelimeler: DCT, DST, OFDM, PAPR, VLC
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

Orthogonal frequency division multiplexing (OFDM) is critical for high-speed visible light communication (VLC) transmission; however, it suffers from a high peak-to-average power ratio (PAPR) problem. Among PAPR reduction techniques, pre-coding methods have shown promising advantages such as signal independence and no requirement for signaling overhead. This paper introduces a novel pre-coding technique termed quartered composite transform pre-coding (QCTP), which employs four newly developed orthogonal pre-coding matrices applied to four equally divided segments of modulated data, thereby enhancing the PAPR performance of VLC systems utilizing OFDM. This methodology allows the utilization of a single-tap equalizer, achieving over a 6 dB reduction in PAPR compared to conventional DCT pre-coding and surpassing the PAPR performance of DCT-hybridized (DCT & $\mu $ -compounding and DCT & Gaussian matrix) pre-coding techniques. This enhancement is accomplished without compromising bit error rate (BER) performance, all while maintaining reduced complexity.