Compensation for non-linear distortion in a modem receiver

A receiver, a technology for receiving signals, applied in modulated carrier systems, wavelet modulated carrier systems, encryption devices with shift registers/memory, etc.
CN1582549AInactive Publication Date: 2005-02-16INTERTECH CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INTERTECH CORP
Publication Date
2005-02-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method and modem for communicating serial input data over a transmission link are disclosed. Serial input data is partitioned into parallel data elements prior to rotation by an invertible linear mapping. Computationally efficient multi-rate wavelet filter banks are employed in a receiver for analyzing a received signal. Self-interference components are calculated in the receiver per sub-band and tap-weights for the filter banks are derived as a function over the range of self-interference values. A weighted sum is formed and subtracted from the delayed, received signal to eliminate the interference, and is removed from the recovered signal.
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Description

Background technique

[0001] As known to those skilled in the art, a modem is an electronic device that modulates transmitted signals and demodulates received signals. A modem generally provides an interface between a digital device and an analog communication system, thereby enabling analog transmission of digital information between two terminals or stations. Such transmissions can occur over transmission links such as telephone lines, cellular communication links, satellite links, and cable television, each of which is typically bandwidth limited. That is, information can be transmitted over the transmission link only over a predetermined frequency range with the greatest bit error rate.

[0002] Modems are well known for providing wireless transmission between transmitting and receiving stations. This wireless communication is used in a variety of applications: VHF, IS-54 (cellular), IS-95 (cellular), SPADE (satellite), GSM (cellular), HDTV and SAT-TV, each utilizing one ...

Claims

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