Patent ID: 6400781
Filing Date: 2002-06-04
Classification: H04L

Abstract:
A multiband detector (DET) used to generate a plurality of sub-band symbols (sy1, . . . , syk, . . . , syN) from a distorted multiband signal (si) applied to a detector input thereof, said multiband detector (DET) comprising a cascade connection of:a. a sub-band reconstruction and distortion compensation arrangement (RDA) whose arrangement input (RDA-I) is coupled to said detector input and which is adapted to compensate for distortion in said distorted multiband signal (si) and to reconstruct a plurality of sub-band signals (si1, . . . , sik, . . . , siN) from said distorted multiband signal (si), and to source each sub-band signal (sik) amongst said plurality of sub-band signals (si1, . . . , sik, . . . , siN) via a respective arrangement output (RDA-Ok) amongst a plurality of arrangement outputs (RDA-O1, . . . , RDA-Ok, . . . , RDA-ON); and b. a decision unit (DEC) with a plurality of unit inputs (DEC-I1, . . . , DEC-Ik, . . . , DEC-IN) coupled one by one to said plurality of arrangement outputs (RDA-O1, . . . , RDA-Ok, . . . RDA-ON) and a plurality of associated unit outputs (DEC-O1, . . . , DEC-Ok, . . . , DEC-ON), said decision unit (DEC) including between each unit input (DEC-Ik) and associated unit output (DEC-Ok) a comparator means (CMPk) adapted to compare said sub-band signal (sik) with a constellation scheme and to thereupon decide upon the value of a sub-band symbol (syk) amongst said plurality of sub-band symbols (sy1, . . . , syk, . . . , syN), CHARACTERISED IN THAT said sub-band reconstruction and distortion compensation arrangement (RDA) contains between said arrangement input (RDA-1) and each arrangement output (RDA-Ok), a single digital filter (FIRk) whose taps are set to perform sub-band reconstruction and distortion compensation simultaneously and to thereby generate a said sub-band signal (sik).