Subcarrier allocation and power control for OFDMA

KIVANÇ TÜRELİ D., Liu H.

34th Asilomar Conference, Pacific Grove, CA, Amerika Birleşik Devletleri, 29 Ekim - 01 Kasım 2000, cilt.1, ss.147-151, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 1
  • Basıldığı Şehir: Pacific Grove, CA
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.147-151
  • Anahtar Kelimeler: Multiuser, OFDM, OFDMA, Power control, Waterfilling
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

In this paper, we study the problem of finding an optimal sub-carrier and power allocation strategy for downlink communication to multiple users in an OFDM based wireless system. We formulate the problem of minimizing total power consumption with constraints on BER and transmission rate for users requiring different classes of service, and derive simple algorithms which perform well. We divide larger problem of joint allocation into two steps. In the first step, the number of subcarriers that each user will get is determined based on the users' average SNR. Numerical results demonstrate that the proposed low complexity algorithms offer comparable performance with an existing iterative algorithm [6].