| 摘要 |
Method and apparatus for signal reflection removal, such as echo cancellatio n, is described. Signal samples are delayed.The delays allow burst processing o f consecutive samples of transmitting and receiving signals in a communication network, such as in a telephone communication system. As a result, there is tremendous reduction of memory bandwidth when compared to conventional sampl e- by~sample processing of signals. Echo cancellers described herein can be implemented in an FPGA. Echo in over a thousand channels can be cancelled using an FPGA and an external memory device. In embodiments for reflected signal cancellation, multiple stages of echo estimation are used.
|
