Abstract: A signal decoder, a method of detecting an RF signal at a MIMO receiver and a MIMO receiver are disclosed herein. In one embodiment, the signal decoder includes: (1) a tree pruner configured to reduce a number of nodes of an MLD tree to expand based on modulation properties of the transmitted radio signals and SE enumeration of at least a portion of the MLD tree and (2) a vector sorter configured to sort multiple rows of child nodes of the MLD tree in parallel.

Abstract: A signal decoder, a method of detecting an RF signal at a MIMO receiver and a MIMO receiver are disclosed herein. In on embodiment, the signal decoder includes: (1) a tree pruner configured to reduce a number of nodes of an MLD tree to expand based on modulation properties of the transmitted radio signals and SE enumeration of at least a portion of the MLD tree and (2) a vector sorter configured to sort multiple rows of child nodes of the MLD tree in parallel.

Abstract: A distributed arithmetic multiply/accumulate (MAC) unit for computing inverse discrete cosine transformations (IDCTs). In one embodiment, the distributed arithmetic MAC unit includes: (1) a first pipeline stage configured to perform dot products on received sequential input data and (2) a second pipeline stage coupled to the first pipeline stage and configured to compute additions and subtractions of the dot products to yield sequential output data.

Abstract: Method and apparatus for canceling an echo path by locating an active region thereof for subsequent application of a filter thereto. A plurality of far-end signals RIN(n) and a corresponding plurality of near-end signals SIN(n) are acquired. Correlation within the far-end and near-end signals RIN(n) and SIN(n) is removed and gain control applied to bring the corresponding ones of the far-end and near-end signals RIN(n) and SIN(n) to a uniform level. The plurality of far-end and near-end signals RIN(n) and SIN(n) are then stored in respective data blocks. The stored data blocks are subsequently processed together to determine a set of coefficients for a bank of adaptive filters. An energy estimate is computed for each one of the bank of adaptive filters and the location of the active region of the echo determined from the energy estimates.