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AssigneeNokia Corporation
InventorsJussi Vepsäläinen, Miikka Hämäläinen
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An RF transceiver includes an Envelope Restoration (ER) transmitter (TX) and a receiver (RX). A method includes providing the TX with a programmable delay element in at least one of an AM path and a PM path; making an RF connection between an output of the TX and an input of the RX; and when receiving a signal through the RF connection, determining a delay value for use in programming the programmable delay element. The method includes measuring an effect on a parameter of a delay mismatch between the AM path and the PM path for use in determining the delay value. Adjacent Channel Leakage Ratio (ACLR); Own-Channel Power (OCP) or Bit Error Ratio (BER) may be measured in this regard. When measuring ACLR, delay is adjusted to minimize ACLR; when measuring OCP, delay is adjusted to maximize OCP; and when measuring BER, delay is adjusted to minimize BER.
A radio frequency (RF) transceiver comprising a transmitter (TX) and a receiver (RX) for coupling to an antenna, the transmitter configured to transmit a signal through the antenna and the receiver RX configured to receive a signal through the antenna, said TX having a polar architecture that comprises at least one programmable delay element in at least one of an amplitude modulation (AM) path and a phase modulation (PM) path, further comprising an RF connection between an output of said TX and an input of said RX, and a controller that is responsive to an output of said RX when receiving a signal through said RF connection for determining at least one delay value for use in programming said at least one programmable delay element.
A method to operate a radio frequency (RF) transceiver for coupling to an antenna, said RF transceiver including an envelope restoration (ER) transmitter (TX) and a receiver (RX), comprising:
A method to calibrate a radio frequency (RF) transceiver that includes an envelope restoration (ER) transmitter (TX) and a receiver (RX), comprising:
Dependencies are inferred from the claim text.