Baseband / RFIC interface for high throughput MIMO communications
AssigneeBroadcom Corporation
InventorsJason A. Trachewsky, Arya Reza Behzad
Life of this patent
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Abstract
Analog signal paths are utilized between a baseband processor and a radio front end to support high throughput communications for a multiple in multiple out radio transceiver that support communications over two or more antennas. Specifically, analog differential I and Q path communication signals are exchanged between a radio front end core and a baseband processor to maximize throughput capacity for high data rate signals. Along the same lines, the impedances of traces and the interface are matched to reduce I/Q imbalance.
Claims20
A multiple-input-multiple-output (MIMO) radio transceiver, comprising:
- a plurality of front end cores, each servicing respective receive in-phase and quadrature phase differential signals and transmit in-phase and quadrature phase differential signals of a plurality of MIMO signals and including a plurality of Received Signal Strength Indicator (RSSI) circuits;
- and
- a MIMO signal interface coupling the plurality of front end cores to at least one baseband processor and configured to receive an RSSI select signal to select at least one output of the plurality of RSSI circuits.
A method for operating a multiple-input-multiple-output (MIMO) transceiver comprising:
- at each of a plurality of front end cores of the MIMO transceiver, servicing respective receive in-phase and quadrature phase differential signals and transmit in-phase and quadrature phase differential signals of a plurality of MIMO signals;
- by a MIMO signal interface, coupling the plurality of front end cores to at least one baseband processor and receiving a Received Signal Strength Indicator (RSSI) select signal;
- and
- selecting, based upon the RSSI select signal, one of a plurality of RSSI circuits of the plurality of front end cores of the MIMO transceiver for output.
A multiple-input-multiple-output (MIMO) radio transceiver, comprising:
- a plurality of front end cores, each comprising at least two Rx/Tx processing blocks and servicing respective receive in-phase and quadrature phase differential signals and transmit in-phase and quadrature phase differential signals of a plurality of MIMO signals;
- and
- a MIMO signal interface coupling the plurality of front end cores to at least one baseband processor, the MIMO signal interface comprising, for each front end core, at least sixteen differential analog signal paths coupling the front end core to the at least one baseband processor.
Dependencies are inferred from the claim text.