公开(公告)号：US20190190554A1

公开(公告)日：2019-06-20

申请号：US15907544

申请日：2018-02-28

Applicant: NXP B.V.

Inventor： Radha SRINIVASAN ,  Ulrich Andreas MUEHLMANN ,  Frederic BENOIST ,  Stefan MENDEL ,  Steve CHARPENTIER

IPC: H04B1/12 ,  H04B5/00 ,  H04B17/318

Abstract: Embodiments are provided for a method of operating a receiver system, the receiver system comprising one or more channels, the method comprising: monitoring a residual DC (direct current) offset in a present channel by sampling an output of an analog-to-digital converter (ADC) of the present channel; adjusting a DCO (direct current offset) correction signal that corresponds to the residual DC offset in response to an absolute value of the residual DC offset exceeding a programmable DCO threshold; and subtracting the DCO correction signal from an analog signal provided to the ADC to reduce the residual DC offset below the programmable DCO threshold.

公开(公告)号：US20190090155A1

公开(公告)日：2019-03-21

申请号：US15706426

申请日：2017-09-15

Applicant: NXP B.V.

Inventor： Ulrich MUEHLMANN ,  Stefan MENDEL ,  Radha SRINIVASAN

IPC: H04W28/04 ,  H04W4/00 ,  H04L5/00 ,  H04W28/02 ,  H04W28/06 ,  H04L29/06

CPC classification number: H04W28/04 ,  H04B5/0025 ,  H04B7/0848 ,  H04L5/0005 ,  H04L65/80 ,  H04W4/80 ,  H04W28/0263 ,  H04W28/06 ,  H04W48/08 ,  H04W72/0453

Abstract: Various embodiments relate to a method and circuit for combining channels, the method including receiving, by a matching and smoothing filter, a signal from an analog to digital converter and extracting a root mean square signal level, receiving, by a noise power detector (“NPD”), the signal from the ADC and assessing noise contribution on the signal and receiving, by a maximum ratio combiner, the signal from the matching and smoothing filter wherein a combiner selects between using a geometric sum and an arithmetic sum to combine the channels.