Vas Postoyalko

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A new approach to the design of a wideband feedforward amplifier is investigated. Phase equalisers instead of linear delay lines are employed in the feedforward reference paths to match the nonlinear delay/phase characteristics of both the main and error amplifiers. A harmonic balance simulation indicates that this provides significant improvement in(More)
This paper investigates the degradation in uncoded B ER due to self-interference ISI caused by nonlinear gain compression and phase rotation in the transmission path. A QPSK scheme is simulated and the probability density functions of the nonlinear distortion effects are analysed with respect to the BER degradation. The results show that AM-AM nonlinearity(More)
In this paper the impact of a Radio-over-Fibre optical subsystem on the performance of Wideband Code Division Multiple Access is evaluated. The study investigates the use of pilot-aided channel estimation to compensate for the optical subsystem non-linearities in the presence of AWGN. The results show that pilot-aided (optical) channel estimation is an(More)
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