Method and apparatus for increasing data rate by reduction of training data
AssigneeMotorola, Inc.
InventorsRene Jepsen, Behzad Mohebbi, Howard Benn
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Abstract
A method is provided for improving the data throughput of a communication system (100) operating under different radio propagation conditions and with radio equipment with different training data requirements. The data rate is increased by optimising the training data structure (205) for the individual radio channel (105) rather than globally employing a worst case training data structure(205). The invention is applicable to the GSM cellular communication system where increased data rate is achieved by setting up links with midamble (205) replaced by user data (203) when allowed by the propagation conditions.
Claims10
A method of increasing a data rate in a communication system operating in a radio environment with certain propagation characteristics using repeated predetermined training data (205) and including a first central station (101) and a first remote unit (103) with certain training data requirements, and a second remote unit (107) with different training data requirements, and said first central station (101) and said first and second remote unit (103,107) each containing a receiving unit and a transmitting unit for communication over radio channels (105), the method comprising the steps of:
- a) determining (303) the propagation characteristics;
- b) determining (305) a training data structure;
- c) transmitting using said training data structure;
- and
- d) receiving using said training data structure said method being further characterised by the steps of
- e) determining (301) the training data requirements of the first remote unit and the second remote unit;
- and
- the determined training data structure being dependent on the determined propagation characteristics and the determined training data requirements.
An apparatus for a communication system operating in a radio environment with certain propagation characteristics using repeated predetermined training data (205) and including a first central station (101) and a first remote unit (103) with certain training data requirements, and a second remote unit (107) with different training data requirements, and said first central station (101) and said first and second remote unit (103,107) each containing a receiving unit and a transmitting unit for communication over radio channels (105), the apparatus comprising:
- a) means for determining the propagation characteristics;
- b) means for determining a training data structure used by the transmitting units and the receiving units,
- said apparatus being further characterised by comprising means for determining the training data requirements of the first remote unit and the second remote unit;
- and by the determined training data structure being dependent on the determined propagation characteristics and the determined training data requirements.
Dependencies are inferred from the claim text.