Method and arrangement for adjusting antenna pattern
First Claim
1. A method for adjusting an antenna pattern for an antenna array of a plurality of antennas, which is effectively connected to at least one of a plurality of transmitters for transmitting antenna signals, and a plurality of receivers for receiving antenna signals, comprising:
- (a) for each antenna, multiplying a respective antenna signal by coefficients for shaping an antenna pattern of the antenna array to produce a first iteration of a desired antenna pattern;
(b) acquiring and forming from each antenna signal as being used to produce said desired antenna pattern a respective digitized baseband signal having a phase and a strength;
measuring the phase and strength of each said digitized baseband signal, and thereby determining differences among the phases and strengths of the respective digitized baseband signals; and
(c) compensating for said differences by adjusting said coefficients, to produce a subsequent iteration of said desired antenna pattern.
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Accused Products
Abstract
A method and an arrangement for adjusting an antenna, pattern particularly in an SDMA system where a transmitter and a receiver include at least two antennas. Baseband antenna signals are multiplied by coefficients shaping the antenna pattern in order to produce a desired antenna pattern. The phase and strength of a baseband antenna signal are measured. On the basis of the measurement, the differences in phase and strength between the antenna signals are compensated by adjusting the coefficients shaping the antenna pattern.
103 Citations
28 Claims
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1. A method for adjusting an antenna pattern for an antenna array of a plurality of antennas, which is effectively connected to at least one of a plurality of transmitters for transmitting antenna signals, and a plurality of receivers for receiving antenna signals, comprising:
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(a) for each antenna, multiplying a respective antenna signal by coefficients for shaping an antenna pattern of the antenna array to produce a first iteration of a desired antenna pattern; (b) acquiring and forming from each antenna signal as being used to produce said desired antenna pattern a respective digitized baseband signal having a phase and a strength;
measuring the phase and strength of each said digitized baseband signal, and thereby determining differences among the phases and strengths of the respective digitized baseband signals; and(c) compensating for said differences by adjusting said coefficients, to produce a subsequent iteration of said desired antenna pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An arrangement for adjusting an antenna pattern for an antenna array of a plurality of antennas, which is effectively connected to at least one of a plurality of transmitters for transmitting antenna signals, and a plurality of receivers for receiving antenna signals, comprising:
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(a) A multiplier means serving for each antenna, for multiplying a respective antenna signal by coefficients for shaping an antenna pattern of the antenna array to produce a first iteration of a desired antenna pattern; (b) means for acquiring and forming from each antenna signal as being used to produce said desired antenna pattern a respective digitized baseband signal having a phase and a strength;
measuring means for measuring the phase and strength of each said digitized baseband signal, and thereby determining differences among the phases and strengths of the respective digitized baseband signals; and(c) compensating means for compensating for said differences by adjusting said coefficients, to produce a subsequent iteration of said desired antenna pattern. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification