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US 2006/0133535 A1Published application
Apparatus and method for linearizing adaptive array antenna system
OwnerJae-Ho Jung, Deuk-Su Lyu +1inventors
InventorsJae-Ho Jung, Deuk-Su Lyu, Hyun-Seo Oh
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Abstract
Disclosed is an apparatus and method for linearizing an adaptive array antenna system. The apparatus and method for linearizing an adaptive array antenna system uses an identical feedback path as feedback path for estimation of a transfer function and a feedback path for linearization of each transmission channel in a multi-channel transmitter, thereby reducing hardware complexity of an adaptive array transmitter.
Claims10
An adaptive array antenna system, comprising:
- modulation means having a plurality of modulators for generating transmitting data corresponding to the number of users;
- beam forming means having a plurality of beam formers for generating a multiplexed data by multiplexing the generated transmitting data to a beam forming weight;
- vector addition means for generating sum data by adding outputs of the beam forming means corresponding to a user;
- array error compensation means for generating error compensated data by multiplexing a reverse of a transfer function of an array transmitting means to the sum data from the vector addition means by using a compensation signal inputted through a frequency down conversion means;
- array linearization means for receiving the error compensated data from the array error compensation means, generating linearized signal by linearizing the error compensated data by using the compensating signal from the frequency down conversion means and transferring the linearized signal to the array transmitting means;
- compensation signal extraction means for extracting a compensation signal from an output signal of the array transmitting means and outputting the compensation signal;
- frequency down conversion means for generating a converted signal by frequency-down converting the compensation signal;
- array transmitting means for converting the linearized signal from the 0array linearization means to an analogue linearized signal and frequency-up converting the analogue linearized signal;
- and
- array antenna for transmitting an output signal passed through the compensation signal extraction means.
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A linearization method of an adaptive array antenna system, the linearization method comprising the steps of:
- a) generating transmitting data corresponding to the number of users;
- b) generating multiplexed data by multiplexing the transmitting data with a beam forming weight;
- c) generating sum data by adding the multiplexed data;
- d) generating error compensated data by compensating the transmitting signal by frequency down converting an output signal of the adaptive array antenna system;
- and
- e) linearizing the error compensated data from the step d) by frequency-down converting the compensation signal and the output signal of the adaptive array antenna system.
3 more elements
Dependencies are inferred from the claim text.