Correction of in phase-quadrature imbalance in the presence of multipath fading
MetadataShow full item record
The presence of in-phase/quadrature (I/Q) imbalance in a dual branch receiver gives rise to signal distortion. If the incoming signal is also corrupted by multipath fading, then the task of correcting or compensating for these two forms of distortion becomes technically very challenging. This paper proposes an adaptive approach which involves first correcting for the I/Q imbalance before the signal is compensated for the effect of multipath fading. Estimations of the I/Q imbalance and channel parameters are carried out with the aid of a common reference signal. Computer simulations have verified the effectiveness of the proposed scheme. In this case, the receiver suffers from frequency-flat I/Q imbalance of 20% gain and 5° phase deviations. Also, the incoming 64-QAM signal is assumed to have undergone a 6-path propagation.
Showing items related by title, author, creator and subject.
Haq, K.; Chung, Kah-Seng (2013)It is well known that dual-branch receivers suffer from in-phase (I) and quadrature (Q) imbalance problems resulting in distortion and poor signal quality. This paper presents a novel technique, incorporating adaptive ...
Haq, K.; Chung, Kah-Seng (2014)This paper presents an adaptive scheme in overcoming signal distortion, caused by I/Q imbalance and multipath propagation, in an OFDM receiver. Estimation of I/Q imbalance and channel parameters is performed in the frequency ...
Comparison and performance study of different I/Q imbalance and channel compensation schemes for OFDM receiversHaq, K.; Chung, Kah-Seng (2015)This paper presents an adaptive combined correction and compensation (ACCC) scheme to mitigate the distortion caused by I/Q imbalance and multipath channel, for OFDM receivers. For the proposed scheme, the estimation of ...