Leakage power measurement apparatus and method

Details Leakage power measurement apparatus and method Leakage power measurement apparatus and method

1997-07-22

2000-08-08

Chin, Stephen

Pulse or digital communications

Testing

375377, 455 671, H04B 1700, H04L 2300

Patent

active

061012181

ABSTRACT:
An apparatus and method for measuring power of carrier channel in question and power leaked from an adjacent channel (leakage power) of a transmitter, and calculating a ratio between the leakage power and the carrier power in the time domain using a digital signal processing technique. The power measurement apparatus includes a frequency mixer which receives a signal from a transmission channel in consideration, an A/D converter for converting an output of the frequency mixer to a digital signal, a Hilbert converter for converting the digital signal into a complex signal, a low pass filter for removing low frequency components from the output signal of the Hilbert converter, a bandpass filter for separating the output of the low pass filter into the carrier power and the leakage power, and a power processing unit for computing the ratio between the leakage power and the carrier power.

REFERENCES:
patent: 3648176 (1972-03-01), Martin et al.
patent: 4810960 (1989-03-01), Owen et al.
patent: 5303262 (1994-04-01), Johnson
patent: 5475709 (1995-12-01), Futagami et al.
patent: 5506869 (1996-04-01), Royer
patent: 5630218 (1997-05-01), Muto

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