Unique word detection system

Details Unique word detection system Unique word detection system

1989-08-29

1991-05-14

Malzahn, David H.

Boots, shoes, and leggings

36472803, G06F 15336

Patent

active

050162063

ABSTRACT:
A unique word and/or a recovered phase in the demodulator in a multi-phase modulation system and/or a multi-level modulation system is detected by obtaining a plurality of correlation values, performing linear calculations for those correlation values to provide a correlation pattern, and looking at a table if this pattern coincides with one of the predetermined patterns. The invention is useful even when a received signal quality is poor and/or the length of the unique words is short. A plurality of unique word, together with a recovered phase are also recognized by the present invention.

REFERENCES:
patent: 4412301 (1983-10-01), Strubeck
patent: 4498141 (1985-02-01), Cooper
patent: 4510579 (1985-04-01), Nossen
"Unique Word Detection in Digital Burst Communications", IEEE Transactions on Communication Technology, vol. COM--16, No. 4, Aug. 1968, pp. 597-605.
"Phase Ambiguity Resolution in a Four--Phase PSK Communications System", IEEE Transactions on Communication Technology, vol. COM--19, No. 6, Dec. 1971, pp. 1200-1210.

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