Wireless Communications
Insights on ICI and its effects on performance of OFDM systems
Digital Signal Processing
An exact error probability analysis of OFDM systems with frequency offset
IEEE Transactions on Communications
Channel estimation using implicit training
IEEE Transactions on Signal Processing
IEEE Transactions on Wireless Communications
BER of OFDM systems impaired by carrier frequency offset in multipath fading channels
IEEE Transactions on Wireless Communications
Exact BER analysis for M-QAM modulation with transmit beamforming under channel prediction errors
IEEE Transactions on Wireless Communications
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In this letter, we calculate an exact closed-form expression for the bit error rate (BER) of orthogonal frequency division multiplexing (OFDM) systems with direct conversion that employ maximal ratio combining (MRC) reception in multipath Rayleigh fading channels, using binary phase-shitf keying (BPSK) modulation. We assume a realistic system model where direct current (DC) offset, carrier frequency offset (CFO) and imperfect channel state information (ICSI) are simultaneously considered. Results show the appearance of an irreducible BER floor due to DC offset and ICSI. As a rule of thumb, we provide a simple expression for the maximum DC offset allowable in a direct conversion receiver.