Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent
1995-10-31
1997-12-16
Tran, Sinh
Telephonic communications
Subscriber line or transmission line interface
Network interface device
381 71, 381 94, A61F 1106, H03B 2900
Patent
active
056994249
ABSTRACT:
A system identification apparatus includes an adaptive filter which processes a reference input signal to obtain an output signal, a subtractor which subtracts the output signal from an observation signal, a pair of mean power estimation circuits which estimate a short-term mean power and a long-term mean power of the reference input signal, respectively, and a power estimation circuit which estimates the power of the reference input signal based on the two mean powers.
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Mei Xu
NEC Corporation
Tran Sinh
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