Efficient VLSI architechtures of adaptive equalizers for QAM/VSB transmission

This paper proposes hardware architectures of adaptive equalizers applicable to both the quadrature amplitude modulation (QAM) and vestigial sideband modulation (VSB) systems. This paper presents digitization methods for QAM and VSB systems requiring a low hardware cost with the performance comparable to that of the algorithm employing oating-point operations. To reduce the hardware cost of the high de nition television (HDTV) equalizers, we also propose a pipelined architecture that processes some parallel parts sequentially.