H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 27/20 (2006.01) H03F 1/32 (2006.01) H04B 1/62 (2006.01) H04L 27/36 (2006.01)
Patent
CA 2200387
In order to correct nonlinearities of an amplifier (20) which receives a radio signal (d') and produces an amplified radio signal representing an input complex digital signal (m), a predistortion table, associating a value of a predistorted complex digital signal with each value of the input complex digital signal, is stored, and the predistorted complex signal (d) is modulated in order to obtain the radio signal addressed to the amplifier. In an adaptation period, a fraction (r') of the amplified radio signal is demodulated in order to obtain a demodulated complex signal (r) which is compared with the input complex signal, with which the predistorted complex signal modulated in said adaptation period is associated, in order to update the predistortion table. The predistortion table is updated on the basis of mean values calculated from blocks of samples of the input complex signal and of the demodulated complex signal, which are stored in the adaptation period.
Peltier Jacques
Schnabl Gottfried
Eads Secure Networks
Fetherstonhaugh & Co.
Peltier Jacques
Schnabl Gottfried
LandOfFree
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