Analog Integrated Circuits and Signal Processing
WSEAS TRANSACTIONS on COMMUNICATIONS
Analysis and compensation of transmitter IQ imbalances in OFDMA and SC-FDMA systems
IEEE Transactions on Signal Processing
An I/Q imbalance estimation and compensation strategy for 3GPP LTE systems
RWS'09 Proceedings of the 4th international conference on Radio and wireless symposium
A low complexity joint parameter estimation scheme for carrier frequency offset and I/Q imbalance
ICACT'09 Proceedings of the 11th international conference on Advanced Communication Technology - Volume 2
BER analysis for MPAM signal constellations in the presence of fading and ADC quantization noise
IEEE Communications Letters
Block-wise estimation of and compensation for I/Q imbalance in direct-conversion transmitters
IEEE Transactions on Signal Processing
Channel estimation in the presence of transmitter and receiver I/Q mismatches for OFDM systems
IEEE Transactions on Wireless Communications
Joint compensation of IQ imbalance and phase noise in OFDM wireless systems
IEEE Transactions on Communications
MPAM signal processing by generalized receiver under Nakagami fading
EHAC'10 Proceedings of the 9th WSEAS international conference on Electronics, hardware, wireless and optical communications
Low-complexity OFDM channel estimation in the presence of I/Q imbalance and phase noise
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
A new joint estimation scheme for carrier frequency offset and I/Q imbalance
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Joint estimation of I/Q imbalance, CFO and channel response for MIMO OFDM systems
IEEE Transactions on Communications
Time domain IQ imbalance compensation for wideband wireless systems
IEEE Communications Letters
IEEE Transactions on Wireless Communications
System- and circuit-level optimization of PLL designs for DVB-T/H receivers
Analog Integrated Circuits and Signal Processing
Wireless Personal Communications: An International Journal
SER Computation in M-QAM Systems with Phase Noise
Wireless Personal Communications: An International Journal
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Nowadays, a lot of effort is spent on developing inexpensive orthogonal frequency-division multiplexing (OFDM) receivers. Especially, zero intermediate frequency (zero-IF) receivers are very appealing, because they avoid costly IF filters. However, zero-IF front-ends also introduce significant additional front-end distortion, such as IQ imbalance. Moreover, zero-IF does not solve the phase noise problem. Unfortunately, OFDM is very sensitive to the receiver nonidealities IQ imbalance and phase noise. Therefore, we developed a new estimation/compensation scheme to jointly combat the IQ imbalance and phase noise at baseband. In this letter, we describe the algorithms and present the performance results. Our compensation scheme eliminates the IQ imbalance based on one OFDM symbol and performs well in the presence of phase noise. The compensation scheme has a fast convergence and a small residual degradation: even for large IQ imbalance, the overall system performance for an OFDM-wireless local area network (WLAN) case study is within 0.6 dB of the optimal case. As such, our approach greatly relaxes the mismatch specifications and thus enables low-cost zero-IF receivers.