Tony Chuang <yhchuang@xxxxxxxxxxx> writes: >> >> <yhchuang@xxxxxxxxxxx> wrote: >> >> > From: Yan-Hsuan Chuang <yhchuang@xxxxxxxxxxx> >> > >> > Add support for doing IQK in firmware >> > >> > Signed-off-by: Yan-Hsuan Chuang <yhchuang@xxxxxxxxxxx> >> >> The commit log does not answer "Why?". What is IQK and how does it help? >> >> No need to resend, I can update the commit log but just let me know what to >> add. >> > > Ideally the RF component's I/Q vectors should be orthogonal, but usually they are not. > So we need to calibrate for the RF components, ex. PA/LNA, ADC/DAC. > > And if the I/Q vectors are more orthogonal, the mixed signal will have less deviation. > This helps with those rates with higher modulation (MCS8-9), because they have more > strict EVM/SNR requirement. Also the better of the quality of the signal, the longer it > can propagate, and the better throughput performance we can get. I added this to patch 4 but there were some warnings so I had drop the patches. So please send v2 and remember to add this description to patch 4. -- Kalle Valo
