Title:
SYSTEM FOR CONVOLUTIONAL ECHO CANCELLATION BY ITERATIVE AUTOCORRELATION
Document Type and Number:
WIPO Patent Application WO2002078313
Kind Code:
B1
Abstract:
Systems are provided for blind echo cancellation in wireless signal processors, such as for wireless repeaters (12). A first embodiment of the echo cancellation system (100a) provides iterative echo cancellation (142a) for white signals, with channel identification. A second embodiment of the echo cancellation system provides iterative echo cancellation (142a) for band-limited signals (18) without channel identification, through the determination of the second-order statistics of a signal. The echo cancellation systems can be implemented using modern digital signal processors for CDMA and broadband wireless communication systems. Analyses and simulations show that the echo cancellation systems can achieve echo cancellation of 40 dB or more at a modest computational cost of several hundred MMACs.
Inventors:
PHAM TIEN
FUERTER MATTHEW P
FUERTER MATTHEW P
Application Number:
PCT/US2002/007912
Publication Date:
November 28, 2002
Filing Date:
March 12, 2002
Export Citation:
Assignee:
REPEATER TECHNOLOGIES INC (US)
International Classes:
H04M9/08; (IPC1-7): H04M9/08
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