an fft for wireless protocols dr. j. greg nash centar ( ) hawai'i international conference on...
Post on 20-Jan-2018
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Required FFT For wireless –Transform size N not restricted to powers of two (e.g., 3GPP LTE requires 128, 256, 1024, 1536, 2048 points) –“Run-time” choice of FFT size –Scaling (chose size of hardware to match system throughput) –Pruning (reducing computational complexity when the number of DFT outputs or inputs is small compared N) –High throughput: ~2.5usec per 1024 point FFT (several data streams associated with multple antennas and high bandwidths) –High dynamic range: db S/QN (high peak-to-average power) For added generality –1-D or 2-D transforms –Low computational latency –Simple, locally connected circuit architecture
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