Multi-mode radio with interference cancellation circuit
First Claim
1. A multi-mode wireless transmit/receive unit (WTRU) comprising:
- a transmit/receive switch electrically coupled to an antenna and a triplexer;
a first coupler having a first output port electrically coupled to the antenna and the triplexer;
a second coupler having a first input port electrically coupled to the triplexer;
a bandpass filter electrically coupled to a second output port of the first coupler;
a vector multiplier electrically coupled to the bandpass filter and a second input port of the second coupler, the vector multiplier configured to reduce or eliminate interference of signals routed through the second coupler, wherein the vector multiplier adjusts the phase and amplitude of the interference; and
an interference canceler control circuit configured to provide in-phase voltage and quadrature voltage to minimize noise.
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Accused Products
Abstract
A multi-mode wireless transmit/receive unit (WTRU) includes at least one antenna, first and second communication mode receivers and a first communication mode transmitter. The first and second receivers simultaneously receive signals from the antenna. The first transmitter generates and sends a first type of signal to the antenna while, at the same time, the second receiver receives a second type of signal from the antenna. In a preferred embodiment, the WTRU further includes a vector multiplier configured to reduce or eliminate interference of signals received by the second receiver, the interference being caused by the first transmitter. The vector multiplier adjusts the phase and amplitude of noise (i.e., spurious in-band noise) measured by the second receiver. The WTRU may further include a second communication mode transmitter configured to generate and send a second type of signal to the antenna.
44 Citations
11 Claims
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1. A multi-mode wireless transmit/receive unit (WTRU) comprising:
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a transmit/receive switch electrically coupled to an antenna and a triplexer; a first coupler having a first output port electrically coupled to the antenna and the triplexer; a second coupler having a first input port electrically coupled to the triplexer; a bandpass filter electrically coupled to a second output port of the first coupler; a vector multiplier electrically coupled to the bandpass filter and a second input port of the second coupler, the vector multiplier configured to reduce or eliminate interference of signals routed through the second coupler, wherein the vector multiplier adjusts the phase and amplitude of the interference; and an interference canceler control circuit configured to provide in-phase voltage and quadrature voltage to minimize noise. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification