Patent ID: 8369445
Filing Date: 2013-02-05
Classification: H04L

Abstract:
1. A method for communication, the method comprising: receiving, by a receiver, a first pre-distorted modulated signal sent by a transmitter, the first pre-distorted modulated signal comprising Doppler error and a first transmitter velocity vector corresponding to movement of the transmitter with respect to the receiver, wherein the first pre-distorted modulated signal is pre-distorted prior to its being received at the receiver, wherein the pre-distorting comprises adjusting the first modulated signal by a first increment to compensate for a first predicted velocity based error in the first modulated signal; receiving, by the receiver, a second pre-distorted modulated signal sent by the transmitter, the second pre-distorted modulated signal comprising Doppler error and a second transmitter velocity vector corresponding to movement of the transmitter with respect to the receiver, wherein the second pre-distorted modulated signal is pre-distorted prior to its being received at the receiver, wherein the pre-distorting comprises adjusting the second modulated signal by a second increment to compensate for a second predicted velocity based error in the second modulated signal, wherein the second increment is different than the first increment; receiving at least one further transmitter velocity vector at a rate depending at least in part upon change of the Doppler error due to movement of the transmitter with respect to the receiver; and if a first predetermined condition exists, compensating for at least one velocity-based error in at least one of the first and second pre-distorted modulated signals by demodulating the first and second pre-distorted modulated signals and at least the at least one further transmitter velocity vector, the demodulation comprising using at least one of the first and further transmitter velocity vectors for frequency adjustment to compensate for the Doppler error of at least one of the received first and second pre-distorted modulated signal.