Timing skew calibration in time-interleaved data converters in carrier aggregation

An apparatus comprising:

• an analog to digital converter configured to:
• receive one or more first frames of a first component carrier signal having a first uplink-downlink subframe pattern, and
• receive one or more additional frames of at least one additional component carrier signal, the one more or more additional frames including one or more second frames of a second component carrier signal, the at least one additional component carrier signal including the second component carrier signal;
• a control logic configured to activate timing skew calibration of at least one of the first or second component carrier signals based, at least in part, on an operating mode of the second component carrier signal and respective symbols of the first component carrier signal and second component carrier signal;
• wherein the first uplink-downlink subframe pattern is a repeating pattern of subframe types D, S, and U.

A non-transitory computer readable medium in communication with a processor, the non-transitory computer readable medium having encoded thereon a set of instructions executable by the processor to:

• receive one or more first frames of a first component carrier signal having a first uplink-downlink subframe pattern;
• receive one or more additional frames of at least one additional component carrier signal, the one more or more additional frames including one or more second frames of a second component carrier signal, the at least one additional component carrier signal including the second component carrier signal;
• and
• activate timing skew calibration of at least one of the first or second component carrier signals based, at least in part, on an operating mode of the second component carrier signal and respective symbols of the first component carrier signal and second component carrier signal;
• wherein the first uplink-downlink subframe pattern is a repeating pattern of subframe types D, S, and U, where the subframe type D includes all downlink symbols, subframe type S includes a mixture of downlink, guard period, and uplink symbols, and subframe type U includes all uplink symbols.