Method for generating symbols for the automatic gain control of a signal to be transmitted
AssigneeThales
InventorFrançois Baptiste
Life of this patent
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Abstract
A method for generating a set of symbols, called AGC symbols, for the automatic control of the amplitude of a signal to be transmitted, the signal including the set of AGC symbols and at least one first information symbol modulated with a linear modulation, includes the following steps: recovering at least one modulated information symbol adjacent to the AGC symbols in the signal; and determining each AGC symbol of the set as a function of at least the modulated information symbol.
Claims7
A method for generating a set of symbols, called automatic gain control (AGC) symbols, for use in an automatic control of an amplitude of a signal to be transmitted, said signal comprising said set of AGC symbols and at least one first information symbol modulated with a linear modulation, said method comprising the following steps:
- selecting, at a processor, at least one modulated information symbol adjacent to said AGC symbols in said signal, and
- determining, at the processor, a value of each AGC symbol of said set as follows:
- an amplitude of an AGC symbol is equal to a linear function of an amplitude of at least said modulated information symbol,
- a phase of the AGC symbol is equal to a phase of said modulated information symbol,
- wherein said linear function includes coefficients that are configured in such a way as to obtain an amplitude level of the signal that is substantially constant over a portion of the signal corresponding to said AGC symbols filtered by a shaping filter.
The method for generating a signal to be transmitted, the method comprising:
- formatting a signal, at a processor, as a plurality of frames each comprising at least one sequence of automatic gain control (AGC) symbols and a sequence of information symbols modulated by a linear modulation, said AGC symbols and said information symbols being filtered by a shaping filter, said processor configured to obtain the at least one sequence of AGC symbols by:
- selecting, at the processor, at least one modulated information symbol adjacent to said AGC symbols in said signal, and
- determining, at the processor, each AGC symbol of said sequence as follows:
- an amplitude of an AGC symbol is equal to a linear function of an amplitude of at least said modulated information symbol,
- a phase of the AGC symbol is equal to a phase of said modulated information symbol,
- wherein said linear function includes coefficients that are configured in such a way as to obtain an amplitude level of the signal that is substantially constant over a portion of the signal corresponding to said AGC symbols filtered by a shaping filter.
A transmitter comprising a processor and a memory, said processor configured to:
- generate a signal to be transmitted, said signal being formatted as a plurality of frames each including at least one sequence of automatic gain control (AGC) symbols and a sequence of information symbols modulated by a linear modulation, said AGC symbols and said information symbols being filtered by a shaping filter, said at least one sequence of AGC symbols being obtained by the processor by:
- selecting at least one modulated information symbol adjacent to said AGC symbols in said signal, and
- determining each AGC symbol of said sequence as follows:
- an amplitude of an AGC symbol is equal to a linear function of an amplitude of at least said modulated information symbol,
- a phase of the AGC symbol is equal to a phase of said modulated information symbol,
- wherein said linear function includes coefficients that are configured in such a way as to obtain an amplitude level of the signal that is substantially constant over a portion of the signal corresponding to said AGC symbols filtered by a shaping filter.
Dependencies are inferred from the claim text.