Modulation index shift signaling
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMiguel Lopez, Bo Hagerman, Yi-Pin Eric Wang
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Abstract
A transmitting device (20) overlays control information onto information bit stream intended for a receiving device (40) by varying or shifting the modulation index in continuous phase modulation (CPM) waveform. The receiving device (40) detects the modulation index used at the transmitting device (20) to modulate the data burst. The receiving device (40) then determines the control information based on the detected modulation index.
Claims36
A method of sending control information from a transmitting device to a receiving device, the method comprising:
- generating a modulated signal that signals the control information to the receiving device by mapping the control information to a selected modulation index set and modulating an information bit stream for the receiving device with a continuous phase modulator using the selected modulation index set;
- and
- transmitting the modulated signal to the receiving device.
A transmitting device configured to send control information to a receiving device comprising:
- a processing circuit configured to generate a modulated signal that signals control information to a receiving device by mapping the control information for the receiving device to a selected modulation index set and modulating an information bit stream with a continuous phase modulator using the selected modulation index set;
- and
- a transmitter configured to transmit the modulated information bit steam to a receiving device.
A method of receiving control information from a transmitting device, the method comprising:
- receiving, from the transmitting device, a modulated signal generated by modulating an information bit stream in a continuous phase modulator using a predefined modulation index set;
- processing the modulated signal to detect the modulation index set used by the transmitting device to generate the modulated signal;
- and
- determining the control information by mapping the modulation index set to a corresponding one of a predefined set of control information.
A receiving device comprising:
- a receiver configured to receive, from a transmitting device, a modulated signal sequence generated by modulating an information bit stream in a continuous phase modulator using a predefined modulation index set;
- a processing circuit configured to detect the modulation index set used by the transmitting device to generate the modulated signal, and to determine the control information by mapping the modulation index set to a corresponding one of a predefined set of control information.
A computer program product stored in a non-transitory computer readable medium for controlling the sending of control information from a transmitting device to a receiving device, the computer program product comprising software instructions which, when run on at least one processor of the transmitting device, causes the transmitting device to:
- generate a modulated signal that signals the control information to the receiving device by mapping the control information to a selected modulation index set and modulating an information bit stream for the receiving device with a continuous phase modulator using the selected modulation index set;
- and
- transmit the modulated signal to the receiving device.
A computer program product stored in a non-transitory computer readable medium for controlling the receiving of control information from a transmitting device, the computer program product comprising software instructions which, when run on at least one processor of a receiving device, causes the receiving device to:
- receive, from the transmitting device, a modulated signal generated by modulating an information bit stream in a continuous phase modulator using a predefined modulation index set;
- process the modulated signal to detect the modulation index set used by the transmitting device to generate the modulated signal;
- and
- determine the control information by mapping the modulation index set to a corresponding one of a predefined set of control information.
Dependencies are inferred from the claim text.