| 摘要 |
A Digital Subscriber Line [DSL] telecommunication device comprising at least one common memory (CM) that is shared between circuits (FFT, Demapper) of the downstream path and corresponding circuits (Mapper, IFFT) of the upstream path. The shared or common memory (CM) advantageously replaces the known two distinct memories (DM, UM) generally used, one for the downstream path and the other for the upstream path. The single common memory (CM) is particularly adapted to Very High Speed Digital Subscriber Line [VDSL-, VDSL or VDSL+] devices where the two downstream frequency ranges (DF1, DF2) are separated by an upstream frequency range (UF1); and a where a second upstream frequency range (UF2) may exist. The size of the common memory shared by the fourth circuits is slightly larger (2800 carriers of 16 bits) than one (2048 carriers of 16 bits) of the known two memories interfacing each only two circuits of a same path. However, the size of this common memory is smaller than the sum (2x2048 carriers of 16 bits) of these two distinct memories. |
