Method and a circuit arrangement for signal processing in a tele

Details Method and a circuit arrangement for signal processing in a tele Method and a circuit arrangement for signal processing in a tele

1997-03-10

2000-05-09

Chin, Stephen

Pulse or digital communications

Spread spectrum

375316, H04K 100, H04L 2726

Patent

active

060613858

ABSTRACT:
The object of the invention is a method and a circuit arrangement for processing a spread spectrum signal and a frequency modulated signal. According to the invention the radio frequency signal is received (1, 2), the received signal is converted into an intermediate frequency signal (3, 4a, 4b), and then an intermediate frequency signal processing (6, 30, 31, 40) is made and the processed intermediate frequency signals are converted (32, 42a, 42b) into baseband signals. The signal derived from the received signal is converted (41) into a digital sampled signal which is processed (32, 42a, 42b, 111, 120, 121) digitally, whereby the either a signal derived from the received spread spectrum signal or a signal derived from the received frequency modulated signal, respectively, is selected (5) as the signal which is converted to the digital sampled signal. According to the invention the same intermediate frequency and baseband components (6, 7, 30, 31, 40, 41) can be used to process both the spread spectrum signal and the frequency modulated signal.

REFERENCES:
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patent: 5519885 (1996-05-01), Vaisanen
patent: 5572254 (1996-11-01), Kawahara
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patent: 5790587 (1998-08-01), Smith et al.
patent: 5878087 (1999-03-01), Ichihara

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