This paper presents practical experiments on a harmonic rejection down-mixer, which offers up to 75 dB of harmonic rejection, without an RF filter. The down-mixer uses a two-stage approach; the first stage is an analog multi-path/multiphase harmonic rejection mixer followed by a second stage providing additional harmonic rejection based on blind adaptive interference canceling in the discrete-time domain. The aim is to show its functional operation. The canceler cannot cope with DC offsets. The DC offsets are removed by highpass filters. The signal paths used to obtain an estimate of the interference must be designed to provide as much attenuation of the desired signal as possible. Front-end nonlinearities and DC offsets are discussed.
|Title of host publication||Proceedings of the 19th Annual Workshop on Circuits|
|Place of Publication||Veldhoven|
|Number of pages||4|
|Publication status||Published - 28 Nov 2008|
|Event||19th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 2008 - Veldhoven, Netherlands|
Duration: 27 Nov 2008 → 28 Nov 2008
Conference number: 19
|Publisher||Technology Foundation STW|
|Conference||19th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 2008|
|Period||27/11/08 → 28/11/08|
Moseley, N. A., Klumperink, E. A. M., & Nauta, B. (2008). A Blind Interference Canceling Technique for Two-Stage Harmonic Rejection in Down-mixers. In Proceedings of the 19th Annual Workshop on Circuits (pp. 214-217). Veldhoven: STW.