Acquisition of Nonlinearity in Electronic Communication Devices
Circuitry of an electronic transmitter may determine characteristics of nonlinear distortion introduced by the electronic transmitter during transmission of electronic signals onto a communication medium, and transmit a training signal, from which the characteristics of the nonlinear distortion can be recovered, prior to transmitting data onto the communication medium. The circuitry may transmit the training signal as part of a preamble of each burst of data transmitted by the circuitry of the electronic transmitter. The circuitry may transmit the training signal as part of a handshaking protocol used for admission of the electronic transmitter to a network. The circuitry may transmit the training signal in response to a request from receiver. The characteristics of the nonlinear distortion comprise an indication of a type of nonlinear distortion model suited for replicating the nonlinear distortion introduced by the electronic transmitter.
1 . A method comprising:
performing by circuitry of an electronic transmitter:
determining characteristics of nonlinear distortion introduced by said electronic transmitter during transmission of electronic signals onto a communication medium; and
transmitting a nonlinear distortion model training signal onto said communication medium prior to transmitting data onto said communication medium, wherein said characteristics of said nonlinear distortion are recoverable from said training signal.
2 . The method of claim 1 , comprising transmitting said nonlinear distortion model training signal as part of a preamble of each burst of data transmitted by said circuitry of said electronic transmitter.
3 . The method of claim 1 , wherein said nonlinear distortion model training signal comprises a direct representation of said characteristics of said nonlinear distortion.
4 . The method of claim 1 , wherein said nonlinear distortion model training signal comprises a deterministic sequence of bits or symbols.
5 . The method of claim 1 , comprising transmitting said nonlinear distortion model training signal as part of a handshaking protocol used for admission of said electronic transmitter to a network.
6 . The method of claim 1 , comprising transmitting said nonlinear distortion model training signal in response to a request from receiver.
7 . The method of claim 1 , wherein said characteristics of said nonlinear distortion comprise an indication of a type of nonlinear distortion model suited for replicating said nonlinear distortion introduced by said electronic transmitter wherein said type is one of the following types: AM/AM, AM/PM, memory-less polynomial, memory (full) polynomial, Volterra, Rapp, and phase noise parametric.
8 . The method of claim 1 , wherein said characteristics of said nonlinear distortion comprise values to be used for parameters of a nonlinear distortion model tasked with replicating said nonlinear distortion introduced by said electronic transmitter.
9 . The method of claim 8 , wherein said parameters of said nonlinear distortion model comprise one or both of an amplitude-to-amplitude distortion parameter and an amplitude-to-phase distortion parameter.
10 . The method of claim 8 , wherein said values are in the form of a table indexed by a signal power parameter.
11 . The method of claim 1 , wherein said characteristics of said nonlinear distortion comprise an identifier of a power amplifier of said electronic transmitter.
12 . The method of claim 1 , wherein said characteristics of said nonlinear distortion comprise a power transfer characteristic of a power amplifier of said electronic transmitter.
13 . A system comprising:
circuitry of an electronic transmitter operable to:
determine characteristics of nonlinear distortion introduced by said electronic transmitter during transmission of electronic signals onto a communication medium; and
transmit a nonlinear distortion model training signal onto said communication prior to transmission of data onto said communication medium, wherein said characteristics of said nonlinear distortion are recoverable from said training signal.
14 . The system of claim 13 , wherein said circuitry of said electronic transmitter is operable to transmit said nonlinear distortion model training signal as part of a preamble of each burst of data transmitted by said circuitry of said electronic transmitter.
15 . The system of claim 13 , wherein said nonlinear distortion model training signal comprises a direct representation of said characteristics of said nonlinear distortion.
16 . The system of claim 13 , wherein said nonlinear distortion model training signal comprises a deterministic sequence of bits or symbols.
17 . The system of claim 13 , wherein said circuitry of said electronic transmitter is operable to transmit said nonlinear distortion model training signal as part of a handshaking protocol used for admission of said electronic transmitter to a network.
18 . The system of claim 13 , wherein said circuitry of said electronic transmitter is operable to transmit said nonlinear distortion model training signal in response to a request from receiver.
19 . The system of claim 13 , wherein said characteristics of said nonlinear distortion comprise an indication of a type of nonlinear distortion model suited for replicating said nonlinear distortion introduced by said electronic transmitter wherein said type is one of the following types: AM/AM, AM/PM, memory-less polynomial, memory (full) polynomial, Volterra, Rapp, and phase noise parametric.
20 . The system of claim 13 , wherein said characteristics of said nonlinear distortion comprise values to be used for parameters of a nonlinear distortion model tasked with replicating said nonlinear distortion introduced by said electronic transmitter.
21 . The system of claim 20 , wherein said parameters of said nonlinear distortion model comprise one or both of an amplitude-to-amplitude distortion parameter and an amplitude-to-phase distortion parameter.
22 . The system of claim 20 , wherein said values are in the form of a table indexed by a signal power parameter.
23 . The system of claim 13 , wherein said characteristics of said nonlinear distortion comprise an identifier of a power amplifier of said electronic transmitter.
24 . The system of claim 13 , wherein said characteristics of said nonlinear distortion comprise a power transfer characteristic of a power amplifier of said electronic transmitter.