×

Multiple-input multiple-output radio transceiver

  • US 6,728,517 B2
  • Filed: 10/11/2002
  • Issued: 04/27/2004
  • Est. Priority Date: 04/22/2002
  • Status: Active Grant
First Claim
Patent Images

1. A multiple-input multiple-output (MIMO) radio transceiver comprising:

  • a. a receiver comprising at least first and second receiver circuits each to process a signal from a corresponding one of first and second antennas, i. the first receiver circuit comprising;

    1. a first downconverter coupled to the first antenna to downconvert a first receive signal detected by the first antenna to produce a first baseband signal; and

    2. a first lowpass filter coupled to the first downconverter that lowpass filters the first baseband signal;

    ii. the second receiver circuit comprising;

    1. a second downconverter coupled to the second antenna to downconvert a second receive signal detected by the second antenna to produce a second baseband signal; and

    2. a second lowpass filter coupled to the second downconverter that lowpass filters the second baseband signal;

    b. a transmitter comprising at least first and second transmitter circuits each of which processes a signal to be transmitted by a corresponding one of the first and second antennas, i. the first transmitter circuit comprising;

    1. a first upconverter that upconverts a first baseband analog signal to generate a first RF signal;

    2. a first bandpass filter coupled to the output of the first upconverter that filters the first RF signal; and

    3. a first power amplifier coupled to the output of the bandpass filter that amplifies the filtered RF signal to produce a first amplified signal that is coupled to the first antenna for transmission;

    ii. the second transmitter circuit comprising;

    1. a second upconverter that upconverts a second baseband analog signal to generate a second RF signal;

    2. a second bandpass filter coupled to the output of the second upconverter that filters the second RF signal; and

    3. a second power amplifier coupled to the output of the second bandpass filter that amplifies the second filtered RF signal to produce a second amplified signal that is coupled to the second antenna for transmission.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×