Digital radio transmission system

Details Digital radio transmission system Digital radio transmission system

H - Electricity

04

Q

363/2

H04Q 7/30 (2006.01) H04J 13/00 (2006.01)

Patent

CA 1280228

ABSTRACT To increase the number of communication channels in a digital radio transmission system it is common practice to use different multiplexing methods. In both transmission directions of the digital radio transmission system the same combination of multiplexing methods is always used. To make economical use of the frequencies in a digital radio transmission system and reduce the costs for the sender in the base station (BS) and in the receiver of the mobile stations (MS) different combinations of multiplexing methods are applied for the grouping of communication channels in both transmission directions. In the base station (BS) the message to be transmitted is introduced into the channels using time-division, code-division and frequency-division multiplexing methods, and in the mobile station (MS) the channels are separated using the corresponding demultiplexing methods. Transmissions from the mobile station (MS) to the base station (BS) can take place for example in mutually separated narrowband frequency channels.

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