N-continuous OFDM with CP alignment

Güvenkaya E., Şahin A., ARSLAN H.

34th Annual IEEE Military Communications Conference, MILCOM 2015, Florida, Amerika Birleşik Devletleri, 26 - 28 Ekim 2015, cilt.2015-December, ss.587-592, (Tam Metin Bildiri) identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 2015-December
  • Doi Numarası: 10.1109/milcom.2015.7357507
  • Basıldığı Şehir: Florida
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.587-592
  • Anahtar Kelimeler: CP alignment, nullspace precoding, OFDM, out-of-band leakage
  • İstanbul Medipol Üniversitesi Adresli: Evet

Özet

In this paper, we propose an out-of-band (OOB) reduction method which incorporates with multipath channel and N-continuous OFDM structure. By exploiting the inevitable guard periods between OFDM symbols, i.e., cyclic prefix (CP), the correction component which maintains symbol continuity is aligned with the CP duration after passing through the multipath channel. Thus, the proposed method enables disturbance-free data subcarriers at the receiver while maintaining the continuity of OFDM symbols. This is achieved by the generalization of conventional N-continuous with using more degrees-of-freedom stemming from the CP duration. As it eliminates the interference on the data symbols caused by the correction term, it yields no modification at OFDM receiver, which makes the proposed scheme backward-compatible to conventional OFDM receivers.