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Transceiver with hybrid adaptive interference canceller for removing transmitter generated noise

A transmitter and self-interference technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as modem 140 congestion

Inactive Publication Date: 2009-09-09
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In cases where multiple RATs are integrated into the same WTRU, self-interference leading to receiver desensitization can be significant
[0003] FIG. 1 shows an example of a problem that occurs in a conventional transceiver 100, which includes a transmitter 105, a power amplifier (PA) 110, and a modulator / demodulator (modem) 140, whereby Noise generated by transmitter 105 and PA 110 congests modem 140

Method used

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  • Transceiver with hybrid adaptive interference canceller for removing transmitter generated noise
  • Transceiver with hybrid adaptive interference canceller for removing transmitter generated noise
  • Transceiver with hybrid adaptive interference canceller for removing transmitter generated noise

Examples

Experimental program
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Embodiment

[0042] 1. A wireless transmit / receive unit (WTRU), the WTRU comprising:

[0043] (a) modem;

[0044] (b) a transmitter that unintentionally generates a corrupted signal that includes a self-interfering signal component and a desired signal component;

[0045] (c) a self-interference canceller (SIC) configured to generate a correction signal similar to the self-interference signal component; and

[0046] (d) An adder configured to subtract the correction signal from the corrupted signal to generate a processed signal that is input to the modem.

[0047] 2. The WTRU of embodiment 1 wherein the SIC canceller is further configured to receive a transmitter noise reference signal comprising a self-interfering signal component and to receive a corrupted signal comprising a self-interfering signal component and a desired signal component.

[0048] 3. The WTRU of embodiment 2, wherein the SIC comprises:

[0049] (c1) a delay unit configured to receive and delay a transmitter noise r...

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PUM

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Abstract

A self-interference canceller (SIC) is incorporated into a transceiver to reduce or eliminate modem jamming when a transmitter in the transceiver transmits at high power levels. The SIC is configured to receive at a first input a transmitter noise reference signal including a self-interfering signal component generated by the transmitter, to receive at a second input a corrupted signal including the self-interfering signal component and a desired signal component generated by the transmitter, and to output a correction signal that resembles the self-interfering signal component. The correction signal is subtracted from the corrupted signal to generate a processed signal that is input to the modem. The SIC may be disabled when the output power of the transmitter is at a level below a predetermined threshold. The invention may be applied to a multi-radio access technology (RAT) transceiver.

Description

technical field [0001] The present invention relates to wireless communication systems. Background technique [0002] Current mobile technology tends to integrate multiple Radio Access Technologies (RATs) into a single Wireless Transmit / Receive Unit (WTRU), which communicates via respective individual antennas or via a common antenna shared through a duplexer filter. transmit and receive. Specific specifications for the RAT air interface are derived based on typical deployment scenarios. In cases where multiple RATs are integrated into the same WTRU, self-interference leading to receiver desensitization may be significant. [0003] 1 shows an example of a problem that occurs in a conventional transceiver 100, which includes a transmitter 105, a power amplifier (PA) 110, and a modulator / demodulator (modem) 140, whereby Modem 140 is congested by the noise generated by transmitter 105 and PA 110 . Transceiver 100 may also include duplexer 115 , antenna 120 , low noise ampli...

Claims

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Application Information

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IPC IPC(8): H04B1/52
CPCH04L27/366H04B1/525H04B1/10H04B1/52
Inventor K·G·维特尔L·卡扎克维奇
Owner INTERDIGITAL TECH CORP
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