Constellation mapping for modulated communications
AssigneeNorthrop Grumman Corporation
InventorsChristopher W. Walker, Holly C. Osborne
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Abstract
Constellations (22) arranged in a concentric circle pattern provide simplified control of modulated communication. A plurality of concentric circles (26, 28, 30) with defined points (24) include convolutionally coded and uncoded bits. Constellation patterns having three or four concentric circles (26, 28, 30) are provided. A magnitude error for each of the points (24) allows for deviations during communication. The constellations (22) provide efficient communication using non-linear channels.
Claims33
A method of transmitting data using a modulated signal, the method comprising:
- using a signal constellation arranged in a concentric circle pattern to represent the data for transmitting the modulated signal.
A method of transmitting a modulated signal, the transmission signal defined by a constellation pattern, the method comprising:
- configuring the transmission signal based upon a signal constellation arranged in a concentric circle pattern.
A system for transmitting data via a modulated signal defined by a signal constellation, the system comprising:
- an encoder for encoding at least part of the data;
- a modulator for modulating the data based upon a signal constellation defined by a plurality of concentric circles;
- a transmitter for transmitting the encoded data as the modulated signal;
- a receiver for receiving the modulated signal;
- a demodulator for demodulating the modulated signal into data;
- and
- a decoder for decoding the at least part of the encoded data.
A transmission scheme for transmitting data using a modulated signal, the transmission scheme comprising:
- a plurality of concentric circles defining a constellation pattern for use in transmitting the data.
Dependencies are inferred from the claim text.