Training sequence for linearizing an RF amplifier
First Claim
1. A method of training a device for linearizing a radiofrequency amplifier which is included within a radiofrequency transmitter of a first equipment of a radiocommunication system, which transmitter is adapted for transmitting bursts according to a determined frame structure, each burst comprising symbols belonging to a determined alphabet of symbols, the method comprising the steps consisting in:
- a) generating a linearization training sequence comprising a determined number N of symbols, where N is a determined integer;
b) transmitting the linearization training sequence by means of the transmitter in at least certain bursts transmitted and thereby generating an aggregate linearization transmission spectrum of the N symbols of the linearization training sequence;
c) comparing the linearization training sequence transmitted with the linearization training sequence generated so as to train said linearization device, wherein a determined number N1 of symbols of the linearization training sequence sent first belong to a subalphabet of symbols included within said alphabet of symbols, said subalphabet of symbols consisting of symbols which, when considering an aggregate spectrum of the transmission of the N1 symbols, produce a narrower spectrum respective to the aggregate linearization spectrum of the N symbols, and wherein N1 is a determined integer greater than one and the N symbols contain at least one symbol outside the subalphabet of symbols.
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Abstract
There is disclosed a linearization training sequence that is transmitted by means of a radio frequency transmitter which is comprised in a mobile terminal or a base station of a radiocommunication system and transmits bursts according to a given frame structure. The sequence comprises a given number N of symbols which are part of an alphabet of symbols, N being an integer. At least one given number N1 of symbols of the sequence that is transmitted first is part of a sub-alphabet of symbols, which is contained in the alphabet of symbols, N1 being an integer that is smaller than or equal to N. The sub-alphabet of symbols consists of individual or a combination of symbols that provide the burst within which the sequence is transmitted with a narrower spectrum than the alphabet of symbols as a whole.
74 Citations
22 Claims
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1. A method of training a device for linearizing a radiofrequency amplifier which is included within a radiofrequency transmitter of a first equipment of a radiocommunication system, which transmitter is adapted for transmitting bursts according to a determined frame structure, each burst comprising symbols belonging to a determined alphabet of symbols, the method comprising the steps consisting in:
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a) generating a linearization training sequence comprising a determined number N of symbols, where N is a determined integer; b) transmitting the linearization training sequence by means of the transmitter in at least certain bursts transmitted and thereby generating an aggregate linearization transmission spectrum of the N symbols of the linearization training sequence; c) comparing the linearization training sequence transmitted with the linearization training sequence generated so as to train said linearization device, wherein a determined number N1 of symbols of the linearization training sequence sent first belong to a subalphabet of symbols included within said alphabet of symbols, said subalphabet of symbols consisting of symbols which, when considering an aggregate spectrum of the transmission of the N1 symbols, produce a narrower spectrum respective to the aggregate linearization spectrum of the N symbols, and wherein N1 is a determined integer greater than one and the N symbols contain at least one symbol outside the subalphabet of symbols. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for training a device for linearizing a radiofrequency amplifier of a radiofrequency transmitter which is included within a first equipment of a radiocommunication system, which transmitter is adapted for transmitting bursts according to a determined frame structure, each burst comprising symbols belonging to a determined alphabet of symbols, the device comprising:
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a) means for generating a linearization training sequence comprising a determined number N of symbols, where N is a determined integer; b) means for transmitting the linearization training sequence by means of the transmitter in at least certain of the bursts transmitted by the transmitter; c) means for comparing the linearization training sequence transmitted with the linearization training sequence generated so as to train said linearization device, wherein a determined number N1 of symbols of the linearization training sequence sent first belong to a subalphabet of symbols included within said alphabet of symbols, said subalphabet of symbols consisting of symbols which, when considering an aggregate spectrum of the transmission of the N1 symbols, produce a narrower transmission spectrum respective to the aggregate linearization spectrum of the N symbols, and wherein N1 is a determined integer greater than one and the N symbols contain at least one symbol outside the subalphabet of symbols. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification