Lockheed Martin Corporation

David O Sieberns

William Joseph Taft

George Silverman

Linda Elaine Eaton Hayes

Harold D Babb

Liane S Jensen

Christopher C Bianchi

James R Petrus

Anthony Eddy

James E Bowe

A dual rate transmitter may include a modulator circuit configured to modulate orthogonal signals to generate a quadrature modulated signal. An amplifier may be configured to amplify the quadrature modulated signal to produce an amplified signal. A quadrature partial response (QPR) filter may be configured to process the amplified signal to generate an output signal. The QPR filter may allow for full rate QPR and half rate QPSK operation of the transmitter device. The output signal may be transmitted via an antenna. This transmitter approach provides a bandwidth efficiency improvement, as the QPR signal may be operated at twice the rate within the same bandwidth as the quadrature modulated signal using a common saturated transmitter implementation, reducing quantity of components and the resulting mass and cost reduction for a space transmitter solution. Additionally, this approach of using QPR signaling provides greater power efficiency.

Dual rate communication

A framer comprises a channel state block configured to store channel state information (CSI) of a data stream. The CSI includes one or more format indicators and one or more sample size indicators. The framer also comprises a frame timer configured to provide frame state information and a frame builder communicatively coupled to the channel state block and the frame timer. The frame builder is configured to receive the one or more format indicators and the one or more sample size indicators. The frame builder is also configured to receive the frame state information and to receive at least some of data units of the data stream. The frame builder is also configured to build a self-describing superframe based on the one or more format indicators, the one or more sample size indicators, the frame state information, and the at least some of data units. A deframer is also disclosed.

Framer and deframer for self-describing superframe

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San Jose, CA, United States of America

David O Sieberns