Method, transmitter, structure, transceiver and access point for provision of multi-carrier on-off keying signal
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorMiguel LOPEZ
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Abstract
A method of transmitting an On-Off Keying, OOK, signal includes an ON waveform and an OFF waveform forming a pattern representing transmitted information. The method includes obtaining a basic baseband waveform; scrambling the basic baseband waveform by applying a first binary randomised sequence where one of the binary values cause transformation to a complex conjugate, modulating the information to be transmitted by applying the scrambled basic baseband waveform for the ON waveform and applying no waveform for the OFF waveform; and transmitting the modulated information.
Claims14
A method of transmitting an On-Off Keying, OOK, signal having an ON waveform and an OFF waveform forming a pattern representing transmitted information, the method comprising:
- scrambling a baseband waveform by at least one of:
- applying a first binary randomised sequence where at least one of the binary values of the first binary randomised sequence causes transformation of the baseband waveform to a complex conjugate of the baseband waveform;
- and
- applying a second binary randomised sequence where binary values apply phase rotations which are mutually separated by a predetermined amount;
- modulating the information to be transmitted by applying the scrambled baseband waveform for the ON waveform and applying no waveform for the OFF waveform;
- and
- transmitting the modulated information.
A transmitter for transmitting an On-Off Keying, OOK, signal which comprises an ON waveform and an OFF waveform forming a pattern representing transmitted information, the transmitter comprising:
- a scrambler configured to scramble a baseband waveform by at least one of:
- applying a first binary randomised sequence where at least one of the binary values of the first binary randomised sequence causes transformation of the baseband waveform to a complex conjugate of the baseband waveform;
- and
- applying a second binary randomised sequence where binary values apply phase rotations which are mutually separated by a predetermined amount;
- a modulator configured to modulate the information to be transmitted by applying the scrambled baseband waveform for the ON waveform and applying no waveform for the OFF waveform;
- and
- a transmitter circuit configured to transmit the modulated information.
An apparatus for generating sequences, the apparatus comprising:
- a shift register;
- a feedback structure connected to the shift register arranged to define a linear feedback shift register according to a polynomial;
- a first output configured to collect one or more state values from a first group of elements of the shift register, the one or more state values from the first group forming a value of a first sequence;
- a second output configured to collect one or more state values from a second group of elements of the shift register, the one or more state values from the second group forming a value of a second sequence, no element of the second group belonging to the first group, and configured to one of:
- collect state values from the second group of elements, the second group comprising a plurality of elements of the shift register such that the second sequence comprises symbols having more than two possible values;
- and
- collect state values from the second group of elements, where the second group comprises a single element of the shift register;
- and
- a third output configured to apply a binary randomised sequence to the second sequence to cause transformation of the second sequence to a complex conjugate of the second sequence.
Dependencies are inferred from the claim text.