Systems and methods for timing mismatch calibration in distributed MIMO using multiple sub-band measurements

A communication device comprising:

• one or more non-transitory computer-readable storage media including instructions;
• and
• one or more processors coupled to the storage media, the one or more processors configured to execute the instructions to:
• determine an optimal number of resource block separation between pairs of measurements based on system settings of a distributed communication system associated with the communication device, wherein the system settings specify one or more of a maximum tolerable calibration error for calibrating timing mismatches or a required calibration accuracy for calibrating timing mismatches;
• access a plurality of transmission signals between a plurality of respective transmission reception points and a user equipment, wherein the plurality of transmission reception points operate in a particular frequency band, wherein the plurality of transmission reception points comprise at least a first transmission reception point and a second transmission reception point, and wherein the plurality of transmission signals comprise at least a first transmission signal between the first transmission reception point and the user equipment and a second transmission signal between the second transmission reception point and the user equipment;
• access a plurality of measurements using one or more reference signals at a plurality of sub-frequency bands over the particular frequency band, wherein the plurality of measurements comprise at least a first pair of measurements associated with a first pair of sub-frequency bands, the first pair of measurements being separated by a first number of resource blocks, and a second pair of measurements associated with a second pair of sub-frequency bands, the second pair of measurements being separated by a second number of resource blocks, and wherein the first pair of measurements and the second pair of measurements are separated by the optimal number of resource block separation;
• determine a timing mismatch between the first transmission signal and the second transmission signal based on (1) the optimal number of resource block separation between the pairs of measurements and (2) the plurality of measurements associated with the plurality of sub-frequency bands;
• and
• generate an integrated transmission signal based on the first transmission signal, the second transmission signal, and the timing mismatch.

A computer-readable non-transitory storage media comprising instructions executable by a processor to:

• determine an optimal number of resource block separation between pairs of measurements based on system settings of a distributed communication system associated with the communication device, wherein the system settings specify one or more of a maximum tolerable calibration error for calibrating timing mismatches or a required calibration accuracy for calibrating timing mismatches;
• access a plurality of transmission signals between a plurality of respective transmission reception points and a user equipment, wherein the plurality of transmission reception points operate in a particular frequency band, wherein the plurality of transmission reception points comprise at least a first transmission reception point and a second transmission reception point, and wherein the plurality of transmission signals comprise at least a first transmission signal between the first transmission reception point and the user equipment and a second transmission signal between the second transmission reception point and the user equipment;
• access a plurality of measurements using one or more reference signals at a plurality of sub-frequency bands over the particular frequency band, wherein the plurality of measurements comprise at least a first pair of measurements associated with a first pair of sub-frequency bands, the first pair of measurements being separated by a first number of resource blocks, and a second pair of measurements associated with a second pair of sub-frequency bands, the second pair of measurements being separated by a second number of resource blocks, and wherein the first pair of measurements and the second pair of measurements are separated by the optimal number of resource block separation;
• determine a timing mismatch between the first transmission signal and the second transmission signal based on (1) the optimal number of resource block separation between the pairs of measurements and (2) the plurality of measurements associated with the plurality of sub-frequency bands;
• and
• generate an integrated transmission signal based on the first transmission signal, the second transmission signal, and the timing mismatch.