| 摘要 |
Methods and devices for allocating codes to user devices to enable extracting an intended signal among a plurality of signals multiplexed over the same physical channel are provided. The methods include determining a threshold number of orthogonal codes to be reserved for allocation to first user devices, based on (i) a number of orthogonal codes usable for allocating, (ii) a usage of the orthogonal codes, and (iii) an average penetration of first user devices, the first user devices being less capable than the second user devices to cancel undesirable interference from a signal extracted using the allocated code. The methods further include allocating an orthogonal code if a number of available orthogonal codes is larger than the threshold number, otherwise allocating an orthogonal code if a first user device requests a connection, and a quasi-orthogonal code if a second user device requests a connection. |
