Patent ID: 8767863

Claim:
An apparatus, comprising: a transceiver configured to: produce two or more encoded spatial data streams, wherein a number of the encoded spatial data streams is different than a number of antennas to be used to transmit the encoded spatial data streams, and utilize a spatial spreading matrix to distribute the two or more encoded spatial data streams to the antennas; wherein the transceiver includes a memory to store the spatial spreading matrix; wherein the spatial spreading matrix has components (i) associated with each row of a row dimension having a number of rows equal to the number of the antennas to be used to transmit the encoded spatial data streams and (ii) associated with each column of a column dimension having a number of columns equal to the number of the encoded spatial data streams to be transmitted, and wherein the spatial spreading matrix satisfies one or more of the following two constraints: (a) the ratio of squared norms of the sum of the components of a row, for different rows of the spatial spreading matrix, is equal to a first constant sequence, and (b) the ratio of squared norms of the sum of a symbol S l to be transmitted, when the symbol S l is equal to 1 or −1, multiplied by each of the components of a row, for different rows of the spatial spreading matrix, is equal to a second constant sequence.