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

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

doi:10.1109/RWS.2012.6175359

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 journal › Conference article › peer-review

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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.

Original language	English
Journal	2012 IEEE Radio and Wireless Symposium
DOIs	https://doi.org/10.1109/RWS.2012.6175359
Publication status	Published (in print/issue) - 3 Apr 2012
Event	2012 IEEE Radio and Wireless Symposium - Santa Clara, United States Duration: 15 Jan 2012 → 18 Jan 2012

Keywords

OFDM
bit error rate
throughput
channel estimation
interference

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10.1109/RWS.2012.6175359

mainAuthor Accepted Manuscript, 267 KB

Cite this

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title = "Adaptive Bit Allocation for OFDM Cognitive Radio Systems with Imperfect Channel Estimation",

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.",

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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

SN - 2164-2974

JO - 2012 IEEE Radio and Wireless Symposium

JF - 2012 IEEE Radio and Wireless Symposium

T2 - 2012 IEEE Radio and Wireless Symposium

Y2 - 15 January 2012 through 18 January 2012

ER -

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

Abstract

Keywords

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