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

Ebrahim Bedeer Mohamed, Mohammed Marey, Octavia A. Dobre, Kareem E. Baddour

Research output: Contribution to journalConference article

5 Citations (Scopus)

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.

Fingerprint

Radio systems
Channel estimation
Cognitive radio
Orthogonal frequency division multiplexing
Frequency selective fading
Communication systems
Throughput

Keywords

  • OFDM
  • bit error rate
  • throughput
  • channel estimation
  • interference

Cite this

Mohamed, Ebrahim Bedeer ; Marey, Mohammed ; Dobre, Octavia A. ; Baddour, Kareem E. / Adaptive Bit Allocation for OFDM Cognitive Radio Systems with Imperfect Channel Estimation. In: 2012 IEEE Radio and Wireless Symposium. 2012.
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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 = "OFDM, bit error rate, throughput, channel estimation, interference",
author = "Mohamed, {Ebrahim Bedeer} and Mohammed Marey and Dobre, {Octavia A.} and Baddour, {Kareem E.}",
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Adaptive Bit Allocation for OFDM Cognitive Radio Systems with Imperfect Channel Estimation. / Mohamed, Ebrahim Bedeer; Marey, Mohammed; Dobre, Octavia A.; Baddour, Kareem E.

In: 2012 IEEE Radio and Wireless Symposium, 03.04.2012.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Adaptive Bit Allocation for OFDM Cognitive Radio Systems with Imperfect Channel Estimation

AU - Mohamed, Ebrahim Bedeer

AU - Marey, Mohammed

AU - Dobre, Octavia A.

AU - Baddour, Kareem E.

PY - 2012/4/3

Y1 - 2012/4/3

N2 - 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.

AB - 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.

KW - OFDM

KW - bit error rate

KW - throughput

KW - channel estimation

KW - interference

U2 - 10.1109/RWS.2012.6175359

DO - 10.1109/RWS.2012.6175359

M3 - Conference article

JO - 2012 IEEE Radio and Wireless Symposium

T2 - 2012 IEEE Radio and Wireless Symposium

JF - 2012 IEEE Radio and Wireless Symposium

SN - 2164-2974

ER -