To Sum Up

Direct conversion receivers provide an elegant way of reducing component count, and
component cost and increased use of baseband processing have meant that DCR can be
applied to GPRS phones, including multiband, multimode GPRS. Careful impedance
matching and attention to design detail means that some of the sensitivity and selectivity
losses implicit in GPRS multislotting can be offset to deliver acceptable RF performance.
Near-zero IF receivers, typically with an IF of 100 kHz (half-channel
spacing) allow AC coupling to be used but require a more highly specified ADC.