Both channel and echo response can be shortened at random with a single FIR equalizer by following the minimum mean square error rule.

使用最小均方误差准则，用一个FIR均衡器联合缩短信息与回波冲激响应，有效地缩短了回波和信道冲激响应长度。

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The welcome to the workshop will be addressed by Franco Gabrielli, Head of the Italian Civil Protection Department, Peter Billing, Deputy Head of Crisis Response Unit at the DG ECHO of the European Commission, Francesca Santoro from UNESCO-IOC, and Pierluigi Soddu, PPRD South Executive Director.

UNESCO: EDUCATION

The Express and Echo, which is circulated in the Exeter area, said the move was in response to falling circulation and market changes.

BBC: Express and Echo