Recent Developments in Integrated Interferer-Tolerant Receivers for Reconfigurable Radios

Abstract

Fragmented spectrum allocations at RF and mm-Wave, increased use of carrier aggregation/MIMO and dense spectrum-reuse in wireless links has led to interest in the design of integrated wideband, high-linearity MIMO RX that provide low noise, blocker tolerance and reconfigurability across signal domains. In this paper, receive architectures for wide operating range and blocker tolerance are presented with a focus on recent developments in reconfigurable N-path receivers. Generalized sequence-mixing architectures that support reconfigurable frequency/spatial/code-domain rejection and filtering are described along with directions of research extending operation to wider bandwidths and higher frequencies.

Keywords

• N-path filters
• reconfigurable receivers
• current-mode
• passive mixers
• sequence mixers
• spatio spectral filtering