Analog Multitone with Interference Suppression: Relieving the ADC Bottleneck for Wideband 60 GHz Systems

Commercial exploitation of the large amounts of unlicensed spectrum available at 60 GHz requires that the authors take advantage of the low-cost Digital Signal Processing (DSP) made available by Moore's law. A key bottleneck, however, is the cost and power consumption of high-precision Analog-to-Digital Converters (ADCs) at the multiGigabit rates of interest in this band. This makes it difficult, for example, to apply traditional DSP-based approaches to channel dispersion compensation such as time domain equalization or Orthogonal Frequency Division Multiplexing (OFDM), since these are predicated on the availability of full-rate, high-precision samples.