Compact wide dynamic range transmitter for point to point radio
First Claim
Patent Images
1. A radio frequency transmitter comprising:
- an electronics rack having an electrical backplane;
a plurality of radio frequency transmitters each operatively connected to said backplane, each transmitter comprising;
a modem which receives one or more input data signals and an adaptive predistortion signal and provides a baseband in-phase (“
I”
) signal and a baseband quadrature (“
Q”
) signal;
a power amplifier module which receives said I and Q signals and provides a radio frequency (“
RF”
) output signal; and
a predistortion module which receives said RF signal, downconverts said RF signal to an intermediate frequency (“
IF”
) signal, downconverts said IF signal to a baseband feedback signal, and samples said feedback signal to thereby provide said adaptive predistortion signal to said modem;
a local reference signal generator; and
a frequency locking circuit; and
a data processing unit (“
DPU”
) operatively connected to said backplane, said DPU having a first and a second common reference signal generator,wherein each said local reference generator is switchably connected to said first common reference signal generator via said frequency locking circuit.
3 Assignments
0 Petitions
Accused Products
Abstract
A radio frequency transmitter comprising a modem which receives one or more input data signals and an adaptive predistortion signal and provides a baseband in-phase signal and a baseband quadrature signal. The transmitter may comprise a power amplifier module which receives the in-phase and quadrature phase signals and provides a radio frequency output signal. A predistortion module receives the radio frequency signal, downconverts the radio frequency signal to an intermediate frequency signal, and downconverts the intermediate frequency signal to a baseband feedback signal. The transmitter samples the feedback signal and provides an adaptive predistortion signal to the modem.
28 Citations
14 Claims
-
1. A radio frequency transmitter comprising:
-
an electronics rack having an electrical backplane; a plurality of radio frequency transmitters each operatively connected to said backplane, each transmitter comprising; a modem which receives one or more input data signals and an adaptive predistortion signal and provides a baseband in-phase (“
I”
) signal and a baseband quadrature (“
Q”
) signal;a power amplifier module which receives said I and Q signals and provides a radio frequency (“
RF”
) output signal; anda predistortion module which receives said RF signal, downconverts said RF signal to an intermediate frequency (“
IF”
) signal, downconverts said IF signal to a baseband feedback signal, and samples said feedback signal to thereby provide said adaptive predistortion signal to said modem;a local reference signal generator; and a frequency locking circuit; and a data processing unit (“
DPU”
) operatively connected to said backplane, said DPU having a first and a second common reference signal generator,wherein each said local reference generator is switchably connected to said first common reference signal generator via said frequency locking circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeAviat U.S., Inc. (Aviat Networks Incorporated)
-
Original AssigneeHarris Stratex Networks Operating Corporation (Aviat Networks Incorporated)
-
InventorsShen, Ying, Laudolff, James, Mashburn, Travis, Nichols, Todd, Schafer, David C., Nguyen, Thanh H.
-
Primary Examiner(s)Nguyen, Lee
-
Application NumberUS11/750,231Publication NumberTime in Patent Office1,699 DaysField of Search455/114.3, 455/126, 330/75, 330/149, 375296-297US Class Current455/114.3CPC Class CodesH04B 1/0475 with means for limiting noi...H04B 1/62 for providing a predistorti...H04B 2001/0425 with linearisation using pr...
