Multiple access telecommunication network

Details Multiple access telecommunication network Multiple access telecommunication network

H - Electricity

04

B

H04B 1/50 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2103172

Abstract: Multiple access telecommunication network. In a multiple access network a main station is to be capable of distinguishing signals transmitted by sub-stations (2 ... 11) to the main station (1). A method of realising this is the use of SCMA (SubCarrier Multiple Access). According to this method the signal to be transmitted is modulated on a subcarrier having its own frequency and then modulated on a main carrier in each sub-station. In prior-art multiple access network the distribution signals which are to be transmitted to the sub-stations by the main station are modulated each on its own distribution subcarrier and then applied to a shared distribution modulator. For diminishing the requirements posed on the high-frequency properties of the electronic components necessary for the network, the subcarriers for distribution signals and return signals are selected to lie in the same frequency band. Fig. 4.

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