Signal processing system, chip, circumscribed card, filtering and transmitting/receiving device and method

Abstract

The invention provides a multi-channel signal processing system, a multi-channel signal processing chip, a method thereof, a manufacturing method thereof, a filtering device, an external signal processing card and a signal transmitting and receiving device. The multi-channel signal processing system comprises a filtering unit which is arranged on a signal transmitting end and a feedback unit which is arranged on a signal receiving end; the filtering unit comprises a signal synthesis unit and a filter, and the signal synthesis unit inputs a signal waiting for transmission; wherein, the filter is used for filtering a crosstalk source signal of the signal waiting for transmission; the signal synthesis unit is used for synthesizing the signal waiting for transmission and the crosstalk source signal after filtering; the feedback unit feeds back according to the received signal waiting for transmission, wherein, the filter is also used for performing subsequent filtering according to information which is acquired by feedback. The invention can self-adaptively cancel a far end crosstalk signal.

Description

technical field [0001] The invention relates to the field of information processing, in particular to a multi-channel signal processing system, a chip and its method and manufacturing method, a filtering device, an external signal processing card, and a signal sending and receiving device. Background technique [0002] xDSL is a general term for all DSL (Digital Subscriber Line, Digital Subscriber Line) technologies. It is a high-speed data transmission technology transmitted on twisted-pair telephone lines. In addition to DSL for transmission, xDSL for passband transmission uses frequency division multiplexing technology to make xDSL and POTS (Plain Old Telephone Service, traditional telephone service) coexist on the same pair of twisted pairs, where xDSL occupies the high frequency band, and POTS occupies the baseband part below 4KHz . A system that provides access to multiple xDSL signals is called a DSLAM (DSLAccess Multiplexer, DSL access multiplexer). [0003] Teleph...

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Problems solved by technology

[0006] The disadvantage of the above method is that the channel transmission matrix needs to be predicted, and the channel transmission matrix is ​​difficult to obtain accurately and conveniently. At the same time, the matrix itself has slow time-varying characteristics and will be affected by transmission environmental factors. Certain difficulties, it is necessary to provide more effective crosstalk elimination technology to facilitate the use in various situations

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