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Radio communication

  • US 9,942,070 B2
  • Filed: 06/09/2015
  • Issued: 04/10/2018
  • Est. Priority Date: 06/13/2014
  • Status: Active Grant
First Claim
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1. A radio transmitter comprising an encoder configured to receive one or more variable message bits and to encode each message bit that has a first value as a predetermined first binary chip sequence and to encode each message bit that has the opposite value as a predetermined second binary chip sequence,wherein the radio transmitter is configured to transmit data packets, each comprising (i) a predetermined synchronisation portion, comprising one or more instances of the first binary chip sequence, and (ii) a variable data portion, comprising one or more encoded message bits output by the encoder;

  • wherein the radio transmitter is configured to transmit the data packets modulated on a radio carrier signal using Gaussian frequency-shift-keying (GFSK), andwherein the modulation of the first and second binary chip sequences is such that, for each binary chip sequence of the first and second binary chip sequences, the respective phase of the radio carrier signal at the end of the binary chip sequence is the same as the respective phase of the radio carrier signal at the start of the binary chip sequence.

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