Pilot-Aided IQ Imbalance Compensation for OFDM Systems Operating Over Doubly Selective Channels
نویسندگان
چکیده
منابع مشابه
Pilot-Symbol-Aided OFDM Channel Estimation in Doubly-Selective Channels
Nowadays, most wireless communication standards utilize Orthogonal Frequency Division Multiplexing (OFDM) as their modulation technique. For coherent detection, the performance of such systems depends strongly on the accuracy of the channel estimation. One possible estimation technique is Pilotsymbol-Aided Channel Estimation (PACE), which allows the reconstruction of the channel by means of int...
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Today a lot of attention is spent on developing inexpensive OFDM receivers. Especially, zero-IF receivers are very appealing, because they avoid costly IF filters. However, this implies IQ demodulation at RF, which therefore cannot be done digitally and thus introduces IQ mismatch. Unfortunately, OFDM is very sensitive to receiver IQ imbalance. Therefore, we developed a new compensation scheme ...
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In this paper, we derive a closed-form expression for the Bit Error Probability (BEP) of an orthogonal frequencydivision multiplexing system that utilizes pilot-symbol-aided channel estimation. We assume Rayleigh fading, additive white Gaussian noise, and that the interpolation is linear but otherwise completely arbitrary. It is shown that the minimum mean squared error interpolation also minim...
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approach at each branch of per-tone equalization (PTEQ) structure has been applied for insufficient cyclic prefix (CP) length. Because of the high amount of adaptive filters and their complex adaption process in PTEQ structure, SCU has been proposed. So using this method leads to reduce the computational complexity while the performance is almost being unchanged. Moreover, using set-membership ...
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ژورنال
عنوان ژورنال: IEEE Transactions on Signal Processing
سال: 2011
ISSN: 1053-587X,1941-0476
DOI: 10.1109/tsp.2011.2112649