Method and apparatus for supporting multiple-access signal in mobile communication system

摘要

In order to generate multiple-access signals, each transmitter transmits information by using all or a part of channel resources. The signal of each transmitter is mapped to an OFDM time-frequency resource space as a trellis modulation path. A mobile communication system maps trellis modulation paths of a plurality of transmitters to the same resource space. In order to effectively detect and distinguish signals of a plurality of transmitters transmitted through the same channel resource space, a receiver uses a message passing method between symbols and a path connection method. The receiver uses a state space expansion method, a backward pre-decoding method, and a successive interference cancellation method to more efficiently reconstruct a discovery signal.

主权项

1. A method of transmitting a multiple-access signal by a transmitter in a mobile communication system, the method comprising:
selecting a transmission resource based on a trellis map, wherein the trellis map indicates information associated with a position changing of at least one tone; determining the multiple-access signal, wherein the multiple-access signal is mapped to one resource slot; and transmitting the multiple-access signal as a function of the selected transmission resource to a receiver, wherein the multiple-access signal transmission is overlapped at two or more transmitters in a time axis.