Symbol determining method and apparatus

Details Symbol determining method and apparatus Symbol determining method and apparatus

1997-01-27

1999-04-27

Chin, Stephen

Pulse or digital communications

Multilevel

With threshold level

375317, 375340, 375264, H04L 2534, H04L 2549

Patent

active

058987347

ABSTRACT:
The level of a symbol information in a symbol-sync part transmitted for the purpose of synchronizing a receiver of a digital radio communications system reflects the state of the concurrent transmission. With this factor taken in account, a symbol determining method is provided which comprises the steps of receiving a symbol information extracted from a symbol-sync part of a received signal obtained by demodulating a received wave and digitizing it; generating thresholds for use to determine the value of the received symbol based on the reception level of the symbol information; determining the value of the received symbol in the data part of the received data based on the thresholds; and reproducing the symbol. Therefore, even if a received symbol is deteriorated due to a degradation, etc. of transmission line, a symbol determination can be done with no degradation of the signal reception due to a narrowing of noise margin, etc.

REFERENCES:
patent: 5425056 (1995-06-01), Maroun et al.
patent: 5521941 (1996-05-01), Wiatrowski
patent: 5670951 (1997-09-01), Servilio

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