Method and apparatus for signal power ramp-up in a communication transmission
A method and apparatus for signal power ramp-up in a communication transmission. Payload data is identified for transmission. A power reference signal is determined for transmission prior to the payload data. The power reference signal and the payload data are combined to form a data burst for transmission. The combined data burst is transmitted as, wherein the power reference signal is transmitted prior to the payload data within the data burst. A feedback signal is provided based on the power reference signal portion of the transmitted data burst, and a pre-distortion signal is calibrated based on the feedback signal.
1 . A method of generating a communication data burst, comprising:
identifying a plurality of payload data to be transmitted;
determining a power reference signal to be transmitted prior to the payload data;
combining at least the power reference signal and the payload data to form a data burst;
transmitting the data burst as a radio-frequency transmission, wherein the power reference signal is transmitted prior to the payload data within the data burst;
providing a feedback signal based on the power reference signal portion of the transmitted data burst; and
calibrating a pre-distortion signal based on the feedback signal.
2 . The method of claim 1 , wherein the calibration is performed for each data burst transmitted.
3 . The method of claim 1 , wherein the power reference signal comprises one or more digital signal samples.
4 . The method of claim 1 , wherein the power reference signal comprises one or more modulated symbols.
5 . The method of claim 4 , wherein the modulated symbols of the power reference signal comprise two or more sequential symbols of equal magnitude.
6 . The method of claim 4 , wherein the modulated symbols of the power reference signal comprise two or more sequential symbols of increasing magnitude.
7 . The method of claim 4 , wherein the modulated symbols of the power reference signal are unrotated.
8 . A method of generating an augmented EDGE data burst for radio-frequency transmission on an EDGE channel between a wireless communication device and a network, comprising:
identifying a plurality payload data, including a plurality of 8PSK modulated symbols, to be transmitted;
determining a power reference signal to be transmitted prior to the payload data;
combining at least the power reference signal and the payload data to form the augmented EDGE data burst;
transmitting the augmented EDGE data burst as a radio-frequency transmission, wherein the power reference signal is transmitted prior to the payload data within the data burst;
providing a feedback signal based on the power reference signal portion of the transmitted augmented EDGE data burst; and
calibrating a pre-distortion signal based on the feedback signal.
9 . The method of claim 8 , wherein the calibration is performed for each augmented EDGE data burst transmitted.
10 . The method of claim 9 , wherein the power reference signal comprises one or more digital signal samples.
11 . The method of claim 8 , wherein the power reference signal comprises one or more 8PSK-modulated symbols.
12 . The method of claim 11 , wherein the modulated symbols of the power reference signal are unrotated.
13 . An apparatus for generating a communication data burst, comprising:
a signal processor programmed with instructions and configured to receive a plurality of payload data to be transmitted, to determine a power reference signal to be transmitted prior to the payload data, and to combine at least the power reference signal and the payload data to form the data burst;
an amplifier in communication with the signal processor and configured to amplify the data bursts,
an antenna in communication with the amplifier and configured to transmit the amplified data burst, wherein the power reference signal is transmitted prior to the payload data within the amplified data burst,
a feedback loop in communication with the amplifier and the signal processor and configured to provide a feedback signal based on the power reference signal portion of the amplified data burst; and
a pre-distortion filter configured to pre-distort a subsequent data burst prior to transmission, wherein the pre-distortion filter is configured for calibration based on the feedback signal.
14 . The apparatus of claim 13 , wherein the power reference signal comprises one or more digital signal samples.
15 . The apparatus of claim 13 , wherein the power reference signal comprises one or more modulated symbols.
16 . The apparatus of claim 15 , wherein the modulated symbols of the power reference signal comprise two or more sequential symbols of equal magnitude.
17 . The apparatus of claim 15 , wherein the modulated symbols of the power reference signal comprise two or more sequential symbols of increasing magnitude.
18 . The apparatus of claim 15 , wherein the modulated symbols of the power reference signal are unrotated.
19 . The apparatus of claim 15 , further comprising:
an FIR filter in communication with the signal processor and the transmitter;
wherein the FIR filter is configured to filter the modulated symbols of the power reference signal and the payload data prior to transmission of the data burst.