Joint Estimation of IQ Parameters and Channel Response for OFDM Systems

In this paper, we develop a new algorithm to jointly estimate the channel impulse response and inphase-quadrature (IQ) imbalances for OFDM systems. The estimation algorithm is based on the expectation maximization(EM) algorithm, exploiting information from the pilot symbols and detected data symbols...

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Vydáno v:2010 IEEE 72nd Vehicular Technology Conference - Fall s. 1 - 5
Hlavní autoři: Marey, M, Samir, M, Dobre, O, El-Shenawy, H, El-Henawy, A
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 01.09.2010
Témata:
Bit error rate
Detectors
Maximum likelihood estimation
OFDM
Receivers
Transmitters
ISBN:1424435730, 9781424435739
ISSN:1090-3038
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Popis
Shrnutí:In this paper, we develop a new algorithm to jointly estimate the channel impulse response and inphase-quadrature (IQ) imbalances for OFDM systems. The estimation algorithm is based on the expectation maximization(EM) algorithm, exploiting information from the pilot symbols and detected data symbols in a systematic fashion. To reduce the complexity of the estimation algorithm, a suboptimal scheme is also introduced. The results indicate that the proposed algorithms achieve a significant improvement in the bit error rate (BER) performance when compared with conventional data-aided algorithms.
ISBN:1424435730
9781424435739
ISSN:1090-3038
DOI:10.1109/VETECF.2010.5594192