Adaptive Bit Allocation for OFDM Cognitive Radio Systems with Imperfect Channel Estimation

Ebrahim Bedeer; Mohamed Marey; Octavia Dobre; Kareem Baddour

Adaptive Bit Allocation for OFDM Cognitive Radio Systems with Imperfect Channel Estimation

Information Theory 2019-02-11 v2 math.IT

Authors: Ebrahim Bedeer , Mohamed Marey , Octavia Dobre , Kareem Baddour

Abstract

Cognitive radios hold tremendous promise for increasing the spectral efficiency of wireless communication systems. In this paper, an adaptive bit allocation algorithm is presented for orthogonal frequency division multiplexing (OFDM) CR systems operating in a frequency selective fading environment. The algorithm maximizes the CR system throughput in the presence of narrowband interference, while guaranteeing a BER below a predefined threshold. The effect of imperfect channel estimation on the algorithm's performance is also studied.

Keywords

adaptive bit allocation ofdm cognitive radio imperfect channel estimation frequency selective fading narrowband interference ber constraint

Cite

@article{arxiv.1801.04010,
  title  = {Adaptive Bit Allocation for OFDM Cognitive Radio Systems with Imperfect Channel Estimation},
  author = {Ebrahim Bedeer and Mohamed Marey and Octavia Dobre and Kareem Baddour},
  journal= {arXiv preprint arXiv:1801.04010},
  year   = {2019}
}