Radio transmitter testing method, radio transmitter and base...

Details Radio transmitter testing method, radio transmitter and base... Radio transmitter testing method, radio transmitter and base...

2006-10-17

2006-10-17

Perez-Gutierrez, Rafael (Department: 2631)

Telecommunications

Transmitter

Measuring, testing, or monitoring of transmitter

C455S126000, C455S067110

Reexamination Certificate

active

07123889

ABSTRACT:
A radio transmitter, comprising: a feedback loop (314) which feedback loop comprises a variable attenuator and a signal analyser, means (300, 302, 304, 306, 308, 310, 312) for transmitting a signal on a predetermined radio channel, means (308) for changing attenuation level and for attenuating the feedback signal, means (316) for defining power levels on the radio channel and on the adjacent channels, means (312) for analysing the power levels to generate first and second results of analysis and for comparing the first and second results of analysis, means (318) for delaying a transmitted signal to derive a reference signal, means (312) for comparing the feedback signal and the reference signal to generate an error vector and means (320) for generating a test alarm.

REFERENCES:
patent: 6912377 (2005-06-01), Hayashihara
patent: 6917389 (2005-07-01), Lee
patent: 2002/0085647 (2002-07-01), Oishi et al.
patent: 2004/0232986 (2004-11-01), Hirose et al.
patent: 2005/0226346 (2005-10-01), Ode et al.
Proakis et al, “Introduction to Digital Signal Processing”, Chapter 8: Design of Digital Filters, Macmillan Publishing Company, 1989, pp. 544-584.
Proakis et al, “Introduction to Digital Signal Processing”, Chapter 9: The Discrete Fourier Transform: Its Properties and Computation; Macmillan Publishing Company, 1989, pp. 682-719.

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