Variable-step self-adaptive echo interference cancellation method based on preliminary channel estimation
A technology of echo interference and echo cancellation, applied in the direction of baseband system components, etc., can solve problems such as slow convergence speed and large steady-state error, and achieve the effect of increasing convergence speed, reducing steady-state error, and satisfying real-time performance
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[0037] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0038] The overall design block diagram of this scheme is as follows: Figure 4 as shown,
[0039] In the initial channel estimation stage, the echo channel is the channel to be estimated in this scheme, the training sequence unit is used to generate the training sequence, the useful signal unit generates the useful signal, the initial channel estimation unit completes the echo channel initial estimation, and the channel tracking unit completes the channel precision Estimate and track echo channel changes.
[0040] first Figure 4 The switch on the left side is set to the side of the channel initial estimation unit, the switch of the system unit transmitter is set to the side of the training sequence unit, and the training sequence unit is generated by the transmitting device to transmit the training sequence, and the signal returns to the system unit and the...
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