iqbal: Add reference to SDR# blog post
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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src/iqbal.c
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src/iqbal.c
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@ -207,6 +207,17 @@ osmo_iqbal_cxvec_estimate(const struct osmo_cxvec *sig,
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/* IQ balance optimization */
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/* IQ balance optimization */
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/* ------------------------------------------------------------------------ */
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/* ------------------------------------------------------------------------ */
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/*
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* The actual algorithm used here is inspired by the IQ balancer of SDR#
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* by Youssef Touil and described here :
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*
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* http://sdrsharp.com/index.php/automatic-iq-correction-algorithm
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*
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* The main differences are:
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* - Objective function uses complex correlation of left/right side of FFT
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* - Optimization based on steepest gradient with dynamic step size
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*/
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/*! \brief Default values for the optimization algorithm */
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/*! \brief Default values for the optimization algorithm */
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const struct osmo_iqbal_opts osmo_iqbal_default_opts = {
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const struct osmo_iqbal_opts osmo_iqbal_default_opts = {
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.fft_size = 1024,
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.fft_size = 1024,
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