A repeater comprising: a processor configured to determine a corrective frequency shift for a signal received from a source device by: determining a representative transmission frequency by determining a channel associated with the signal and identifying the representative transmission frequency associated with the channel; determining a relative velocity of the repeater to the source device by: determining an identifier, identifying the source device, in the signal; retrieving a geographic location of the source device from a computer readable medium based on the identifier; and determining the relative velocity based on the geographic location of the source device and a geographic location of the repeater; and determining the corrective frequency shift for the signal, without measuring a frequency shift of the signal, by multiplying the relative velocity by the representative transmission frequency and dividing the product by a propagation speed of the signal; a frequency-shifting module in communication with the processor, the frequency-shifting module being configured to shift the signal using the corrective frequency shift prior to wirelessly transmitting the shifted signal to a destination device (108a-c), wherein the destination device (108a-c) is different from the source device; wherein the processor is further configured to: identify a destination, in the amongst a plurality of source devices, to which an uplink signal is to be transmitted; and determine a compensating frequency shift for the uplink signal based on an uplink transmission frequency and a velocity of the repeater relative to a geographic location of the destination; wherein the frequency-shifting module is further configured to shift the uplink signal using the compensating frequency shift prior to transmitting the uplink signal to the destination. a processor configured to determine a corrective frequency shift for a signal received from a source device by: determining a representative transmission frequency by determining a channel associated with the signal and identifying the representative transmission frequency associated with the channel; determining a relative velocity of the repeater to the source device by: determining an identifier, identifying the source device, in the signal; retrieving a geographic location of the source device from a computer readable medium based on the identifier; and determining the relative velocity based on the geographic location of the source device and a geographic location of the repeater; and determining the corrective frequency shift for the signal, without measuring a frequency shift of the signal, by multiplying the relative velocity by the representative transmission frequency and dividing the product by a propagation speed of the signal; determining a representative transmission frequency by determining a channel associated with the signal and identifying the representative transmission frequency associated with the channel; determining a relative velocity of the repeater to the source device by: determining an identifier, identifying the source device, in the signal; retrieving a geographic location of the source device from a computer readable medium based on the identifier; and determining the relative velocity based on the geographic location of the source device and a geographic location of the repeater; and determining an identifier, identifying the source device, in the signal; retrieving a geographic location of the source device from a computer readable medium based on the identifier; and determining the relative velocity based on the geographic location of the source device and a geographic location of the repeater; and determining the corrective frequency shift for the signal, without measuring a frequency shift of the signal, by multiplying the relative velocity by the representative transmission frequency and dividing the product by a propagation speed of the signal; a frequency-shifting module in communication with the processor, the frequency-shifting module being configured to shift the signal using the corrective frequency shift prior to wirelessly transmitting the shifted signal to a destination device (108a-c), wherein the destination device (108a-c) is different from the source device; wherein the processor is further configured to: identify a destination, in the amongst a plurality of source devices, to which an uplink signal is to be transmitted; and determine a compensating frequency shift for the uplink signal based on an uplink transmission frequency and a velocity of the repeater relative to a geographic location of the destination; identify a destination, in the amongst a plurality of source devices, to which an uplink signal is to be transmitted; and determine a compensating frequency shift for the uplink signal based on an uplink transmission frequency and a velocity of the repeater relative to a geographic location of the destination; wherein the frequency-shifting module is further configured to shift the uplink signal using the compensating frequency shift prior to transmitting the uplink signal to the destination.