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DIGITAL UP CONVERSION (DUC)
An interpolating filter chain, numerically controlled oscillator, and mixer comprise the DUC. A lowpass interpolator, halfband interpolator, CIC compensation interpolator, CIC interpolator, and CIC gain correction comprise the filter chain.
Because sample rates are lower at the beginning of the chain, the earlier filters can maximize resource use by sharing multipliers. The CIC compensation interpolator improves the spectral response by accounting for later CIC droop when interpolating by two. For cell search and master information block recovery, LTE receivers typically employ a sampling rate of 1.92 Msps.
Because sample rates are lower at the beginning of the chain, the earlier filters can maximize resource use by sharing multipliers. The CIC compensation interpolator improves the spectral response by accounting for later CIC droop when interpolating by two. For cell search and master information block recovery, LTE receivers typically employ a sampling rate of 1.92 Msps.
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Block Diagram of the DIGITAL UP CONVERSION (DUC) IP Core
