Discrete-time signal processing (2nd ed.)
Discrete-time signal processing (2nd ed.)
Wireless OFDM Systems: How to Make Them Work?
Wireless OFDM Systems: How to Make Them Work?
OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
OFDM for Wireless Communications Systems
OFDM for Wireless Communications Systems
CMOS Circuit Design, Layout, and Simulation, Second Edition
CMOS Circuit Design, Layout, and Simulation, Second Edition
Channel models for ultrawideband personal area networks
IEEE Wireless Communications
New efficient FFT algorithm and pipeline implementation results for OFDM/DMT applications
IEEE Transactions on Consumer Electronics
Analog-to-digital converter survey and analysis
IEEE Journal on Selected Areas in Communications
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A discrete-time (DT) fast Fourier transform (FFT) processor which enables an architectural improvement to ultrawide-bandwidth orthogonal frequency-division multiplexing (OFDM) receivers for use in low-power handheld applications is presented. The new architecture performs FFT demodulation of the OFDM signal in the DT signaling domain before analog-to-digital conversion. The approach significantly reduces the required number of bits in the analog-to-digital converter (ADC) while increasing receiver linearity and providing improved handling of narrow-band blockers. The processor is first implemented in simulation using a top-down methodology based on behavioral models which are developed to describe the circuit functions of the DT FFT processor. System simulation results show that the processor can be implemented with DT CMOS circuits having typical nonidealities while outperforming equivalent all-digital FFT processors. An improvement in dynamic range in the FFT processor and ADC from 35 to 54 dB is demonstrated through simulation.