MASTER-SLAVE LOCAL OSCILLATOR PORTING BETWEEN RADIO INTEGRATED CIRCUITS
First Claim
1. A radio integrated circuit (IC) comprising:
- at least one transmitter configured to transmit a signal;
at least one receiver configured to receive a signal;
a local oscillator signal source configured to generate a local oscillator signal for use in radio transmission or radio reception; and
a port circuit configured to provide a representation of local oscillator signal from another radio IC for use by the other radio IC in radio transmission or radio reception.
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Accused Products
Abstract
A technique to share a local oscillator signal between two radio frequency integrated circuits (RFICs). The local oscillator signal generated internally by one RFIC is ported to the other RFIC for use in transmit or receive operation. The local oscillator signal that is ported may be an RF local oscillator signal. Each RFIC may include a bi-directional port circuit that can be operated to make the RFIC a master, slave or may be totally disabled to disable the porting feature. This is particularly useful in RFICs that are used to communicate using MIMO radio algorithms which rely for optimum performance on phase and frequency coherency among a plurality of transmitters and a plurality of receivers.
51 Citations
12 Claims
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1. A radio integrated circuit (IC) comprising:
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at least one transmitter configured to transmit a signal; at least one receiver configured to receive a signal; a local oscillator signal source configured to generate a local oscillator signal for use in radio transmission or radio reception; and a port circuit configured to provide a representation of local oscillator signal from another radio IC for use by the other radio IC in radio transmission or radio reception. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A radio integrated circuit (IC) comprising:
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at least one transmitter configured to transmit a signal; at least one receiver configured to receive a signal; and a port circuit configured to receive a representation of local oscillator signal from another radio IC for use in radio transmission or radio reception. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification