Back to results
US 9,432,110 B2Granted
System and method for code multiplexing
AssigneeThe Boeing Company
InventorCornel Prunean
Life of this patent
Estimating the term…
Abstract
A system and method include a modulator to combine satellite codes with a carrier signal on an I-Channel and a Q-Channel. A processor applies a code power fraction to the combined codes on the I-Channel and the Q-Channel to provide a unity amplitude while maintaining a phase angle so that a signal constant envelope transmission can occur without a balancing code.
Claims20
A system, comprising:
- a modulator configured to:
- modulate, on an in-phase channel (I-channel), a first portion of data using a first combination of two or more satellite codes of a plurality of satellite codes,
- modulate, on a quadrature-phase channel (Q-channel), a second portion of the data using a second combination of two or more satellite codes of the plurality of satellite codes, and
- combine each of the modulated first and second portions of the data with a respective carrier signal to produce an in-phase signal component and a quadrature-phase signal component;
- and
- a processor coupled with the modulator and configured to apply a code power fraction to the produced in-phase and quadrature-phase signal components.
3 more elements
A method for transmitting a plurality of satellite codes from a radio frequency (RF) transmitter of a satellite, the method comprising:
- combining, on a first modulated channel and a second modulated channel of a plurality of modulated channels, a combination of two or more satellite codes of the plurality of satellite codes, the first modulated channel and the second modulated channel respectively comprising an in-phase channel (I-channel) and a quadrature-phase channel (Q-channel);
- and
- applying, using a processor of the RF transmitter, a code power fraction to the first modulated channel and the second modulated channel of the plurality of modulated channels to thereby produce a constant-envelope signal for transmission,
- wherein the code power fraction comprises a first amplitude corresponding to the first modulated channel and a second amplitude corresponding to the second modulated channel.
1 more element
A method of communication using a satellite, the method comprising:
- combining, on each of an in-phase channel (I-channel) and a quadrature-phase channel (Q-channel), a respective combination of two or more satellite codes selected from a plurality of satellite codes with a carrier signal to produce an in-phase signal component and a quadrature-phase signal component;
- applying a code power fraction to the produced in-phase and quadrature-phase signal components, the code power fraction comprising an assigned I-channel amplitude and an assigned Q-channel amplitude;
- and
- transmitting, using a radio frequency (RF) transmitter of the satellite, the in-phase signal component and the quadrature-phase signal component with the applied code power fraction as a constant-envelope signal without applying a balancing code.
1 more element
Dependencies are inferred from the claim text.