Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring
Patent
1997-12-02
1999-08-10
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By monitoring
342173, 342372, G01S 740
Patent
active
059365692
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.
REFERENCES:
patent: 5412414 (1995-05-01), Ast et al.
patent: 5739784 (1998-04-01), Jan et al.
patent: 5754139 (1998-05-01), Turcotte et al.
Erkkila Esko
Pekkarinen Jari
St.ang.hle Lauri
Blum Theodore M.
Nokia Telecommunications Oy
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