SEPURA PLC Patent applications |
Patent application number | Title | Published |
20160036607 | MOBILE COMMUNICATIONS SYSTEM - A scheme for indicating the presence of stealing or other information in a digital mobile radio communications system. A sequence of pilot symbols and/or synchronisation symbols that can be distinguished from a normal sequence of pilot symbols and/or synchronisation symbols is included in a transmission to indicate the presence of stealing. A receiver determines whether a received transmission includes the stealing sequence or the normal sequence and decodes the transmission accordingly. | 02-04-2016 |
20160006588 | MOBILE COMMUNICATIONS SYSTEM - A modulation scheme for use in a digital mobile radio communications system. The modulation scheme uses a four slot time-division multiple access scheme with 12.5 kHz channels. Each 12.5 kHz channel contains plural sub-carriers and each sub-carrier is modulated with a modulation scheme that encodes at least 4 bits per symbol. The modulation scheme can be used in a standalone mobile radio communications system, or in a hybrid mobile radio communications system that also uses standard TETRA modulation schemes. | 01-07-2016 |
20100142434 | CONFIGURABLE APPARATUS AND METHOD - A TETRA gateway apparatus ( | 06-10-2010 |
20100114565 | AUDIBLE ERRORS DETECTION AND PREVENTION FOR SPEECH DECODING, AUDIBLE ERRORS CONCEALING - A method and apparatus of providing an audio output to a user in a communications system in which the audio to be output to a user, preferably an audio frame, is assessed before it is broadcast to the user, and then selectively changed on the basis of the assessment. The assessment may be carried out in the audio encoding process, in the audio decoding process and/or after the audio decoding process. The selective changing of the audio output may comprise selectively replacing the audio output and/or re-encoding of the audio output. | 05-06-2010 |