OFDM for Wireless Multimedia Communications
OFDM for Wireless Multimedia Communications
Operation and Modeling of the Mos Transistor (The Oxford Series in Electrical and Computer Engineering)
Energy Scavenging for Mobile and Wireless Electronics
IEEE Pervasive Computing
VLSID '06 Proceedings of the 19th International Conference on VLSI Design held jointly with 5th International Conference on Embedded Systems Design
Probability propagation and decoding in analog VLSI
IEEE Transactions on Information Theory
IEEE Transactions on Circuits and Systems II: Express Briefs
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An N-symbol discrete Fourier transform (N-DFT) processor based on analog CMOS current mirrors that operate in the strong inversion region is presented. It is shown that transistor mismatch can be modeled as an input-referred noise source that can be used in system-level studies. Simulations of a radix-2, 256-symbol fast Fourier transform (FFT) show that the model produces equivalent results to those of a model that incorporates a mismatch term into each current mirror. It is shown that in general, high-radix FFT structures and specifically the full-radix DFT have reduced sensitivity to mismatch and a reduced number of current mirrors compared to radix-2 structures and have some key advantages in terms of transistor count with respect to comparable digital implementations. Simulations of an orthogonal frequency-division multiplexing system with forward error control coding, that take into account current mirror nonidealities such as mismatch, show that an analog DFT front end loses only 0.5 dB with respect to an ideal circuit.