Method and apparatus for classifying a multi-level signal

Details Method and apparatus for classifying a multi-level signal Method and apparatus for classifying a multi-level signal

1996-12-16

1998-11-03

Vu, Huy D.

Pulse or digital communications

Receivers

375287, 4552261, H03K 900, H04L 2706, H04L 2714, H04L 2722

Patent

active

058320385

ABSTRACT:
A radio receiver circuit (100) is used for receiving a multi-level signal from a radio communication system. The multi-level signal includes a plurality of symbols, wherein each level is representative of a symbol of data. The receiver circuit (100) includes a demodulator circuit (106) and a digital circuit (112). The demodulator circuit (106) is used for receiving the multi-level signal and for generating baseband samples for each symbol, whereby each sample has a phase and a signal level. The digital circuit (112) is coupled to the demodulator circuit (106), and is adapted to tally, by category, occurrences of the baseband samples, whereby each category is representative of one of a plurality of phases, and one of a plurality of signal level ranges. The digital circuit (112) is further adapted to correlate the categories to at least one predetermined template, and to classify the multi-level signal according to the correlation results.

REFERENCES:
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patent: 4816820 (1989-03-01), Davis
patent: 5311554 (1994-05-01), Morera et al.
patent: 5448206 (1995-09-01), Newhall
patent: 5450612 (1995-09-01), Chanroo
patent: 5533062 (1996-07-01), Liberti
patent: 5563910 (1996-10-01), Mellone
patent: 5651030 (1997-07-01), Wong et al.

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