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المؤلفOzdemir, Ozgur
المؤلفHamila, Ridha
المؤلفAl-Dhahir, Naofal
تاريخ الإتاحة2016-02-08T14:21:27Z
تاريخ النشر2014-10
اسم المنشورIEEE Transactions on Vehicular Technology
المصدرScopus
الاقتباسOzdemir, O., Hamila, R., Al-Dhahir, N. "Exact average OFDM subcarrier SINR analysis under joint transmit-receive I/Q imbalance." (2014) IEEE Transactions on Vehicular Technology, 63 (8), art. no. 6732973, pp. 4125-4130.
الرقم المعياري الدولي للكتاب0018-9545
معرّف المصادر الموحدhttp://dx.doi.org/10.1109/TVT.2014.2304833
معرّف المصادر الموحدhttp://hdl.handle.net/10576/4131
الملخصThe subcarrier signal-to-interference-plus-noise ratio (SINR) expression for orthogonal frequency-division multiplexing (OFDM) systems impaired by in-phase/quadrature (I/Q) imbalance is a ratio of correlated random variables. In its original form, a quadruple integral is required to evaluate the exact average subcarrier SINR, which is cumbersome to compute numerically. We show that the quadruple integral can be reduced to a single integral, which can be easily evaluated numerically. Furthermore, closed-form expressions are derived for several important special cases, including transmit (TX)-only I/Q imbalance, receive (RX)-only I/Q imbalance, and joint TX/RX I/Q imbalance with equal levels of I/Q imbalance at the transmitter and at the receiver. In addition, we derive high-input-SNR approximations that provide valuable insights on how the average SINR is affected by the I/Q imbalance levels at the transmitter and the receiver and by the channel correlation between the image OFDM subcarriers. For example, we show that at high input SNR, TX-only I/Q imbalance is more harmful, in terms of average subcarrier SINR, than RX-only I/Q imbalance. Furthermore, we show that an approximate OFDM subcarrier SINR expression, commonly used in the literature, is not accurate when RX I/Q imbalance is present.
راعي المشروعQatar National Research Fund under Grant NPRP 09-062-2-035.
اللغةen
الناشرIEEE
الموضوعIn-phase/quadrature (I/Q) Imbalance
orthogonal frequency-division multiplexing (OFDM)
signal-to-interference-plusnoise ratio (SINR)
العنوانExact average OFDM subcarrier SINR analysis under joint transmit-receive I/Q imbalance
النوعArticle
الصفحات4125-4130
رقم العدد8
رقم المجلد63


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