BER-Optimized Robust Precoder Design for MIMO-OFDM Systems with Insufficient CP

This paper considers a robust precoder design for MIMO-OFDM systems with insufficient cyclic prefix (CP). Interference alignment is utilized to formulate the precoder design problem as a bit error rate (BER) minimization problem subject to a total power constraint. To this end, the precoder is desig...

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Published in:2016 IEEE Global Communications Conference (GLOBECOM) pp. 1 - 6
Main Authors: Akhtar, Javed, Bedi, Amrit S., Rajawat, Ketan, Jagannatham, Aditya K.
Format: Conference Proceeding
Language:English
Published: IEEE 01.12.2016
Subjects:
Bit error rate
Interference
MIMO
OFDM
Receivers
Robustness
Transmitters
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Abstract This paper considers a robust precoder design for MIMO-OFDM systems with insufficient cyclic prefix (CP). Interference alignment is utilized to formulate the precoder design problem as a bit error rate (BER) minimization problem subject to a total power constraint. To this end, the precoder is designed to be robust to the errors in the available channel estimates, by considering the worst-case BER for optimization. Interestingly, channel estimates at both transmitter and receiver are allowed to be in error. Extensive simulations are carried out to compare the performance of various MIMO-OFDM systems with and without robust precoders.
AbstractList This paper considers a robust precoder design for MIMO-OFDM systems with insufficient cyclic prefix (CP). Interference alignment is utilized to formulate the precoder design problem as a bit error rate (BER) minimization problem subject to a total power constraint. To this end, the precoder is designed to be robust to the errors in the available channel estimates, by considering the worst-case BER for optimization. Interestingly, channel estimates at both transmitter and receiver are allowed to be in error. Extensive simulations are carried out to compare the performance of various MIMO-OFDM systems with and without robust precoders.
Author Bedi, Amrit S.
Rajawat, Ketan
Jagannatham, Aditya K.
Akhtar, Javed
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  givenname: Javed
  surname: Akhtar
  fullname: Akhtar, Javed
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  givenname: Amrit S.
  surname: Bedi
  fullname: Bedi, Amrit S.
  email: amritbd@iitk.ac.in
  organization: Dept. of Electr. Eng., IIT Kanpur, Kanpur, India
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  givenname: Ketan
  surname: Rajawat
  fullname: Rajawat, Ketan
  email: ketan@iitk.ac.in
  organization: Dept. of Electr. Eng., IIT Kanpur, Kanpur, India
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  givenname: Aditya K.
  surname: Jagannatham
  fullname: Jagannatham, Aditya K.
  email: adityaj@iitk.ac.in
  organization: Dept. of Electr. Eng., IIT Kanpur, Kanpur, India
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Snippet This paper considers a robust precoder design for MIMO-OFDM systems with insufficient cyclic prefix (CP). Interference alignment is utilized to formulate the...
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SubjectTerms Bit error rate
Interference
MIMO
OFDM
Receivers
Robustness
Transmitters
Title BER-Optimized Robust Precoder Design for MIMO-OFDM Systems with Insufficient CP
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