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A low-complexity self-calibrating adaptive quadrature receiver

By E. Cetin, S.S. Demirsoy, I. Kale and R.C.S. Morling


In this paper digital part of a self-calibrating quadrature-receiver is described, containing a digital calibration-engine. The blind source-separation-based calibration-engine eliminates the RF-impairments in real-time hence improving the receiver's performance without the need for test/pilot tones, trimming or use of power-hungry discrete components. Furthermore, an efficient time-multiplexed calibration-engine architecture is proposed and implemented on an FPGA utilising a reduced-range multiplier structure. The use of reduced-range multipliers results in substantial reduction of area as well as power consumption without a compromise in performance when compared with an efficiently designed general purpose multiplier. The performance of the calibration-engine does not depend on the modulation format or the constellation size of the received signal; hence it can be easily integrated into the digital signal processing paths of any receiver

Topics: UOWSAT
Publisher: IEEE
Year: 2006
OAI identifier: oai:westminsterresearch.wmin.ac.uk:3320
Provided by: WestminsterResearch

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