Method for mixing a complex digital signal with a reference signal, mixer and digital-to-analogue converter using the method
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United States of America Patent
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May 21, 2013
Grant Date -
Jan 19, 2012
app pub date -
Mar 29, 2010
filing date -
Apr 2, 2009
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Abstract
Method and mixer using the method for mixing a complex digital input vector with an oscillator reference signal based on a separation of the mixing process in mainly two processing steps, to with a first step in which a set of n real part values Vi, is derived from said complex digital input vector in which n is an integer larger than 1 and in which each real part value Vi is proportional to the real part of the digital input vector when being rotated over predetermined phase angles φi=φ0+i*Δφ, respectively, for a constant φ0, Δφ corresponding to either 2π/n or −2π/n, with integer i varying between 0 and n−1 and a second step, in which said n real part values and Vi are each consecutively selected to be coupled to a load.
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