Method and apparatus for reducing interference in space frequency block coding communication

摘要

A method and apparatus of reducing interference in space frequency block coding (SFBC) communication are disclosed. SFBC encoding is performed on at least one pair of symbols. The symbols are assigned to subcarriers in accordance with a frequency assignment pattern assigned to a cell. Different frequency assignment patterns are assigned to neighboring cells. Cells in the network may be divided into a plurality of groups and a different frequency assignment pattern may be assigned to each group of cells. The frequency assignment pattern may be defined such that subcarriers mapped to a pair of symbols in one cell are interlaced to subcarriers mapped to a pair of symbols in a neighbor cell. Alternatively, the frequency assignment pattern may be defined such that subcarriers mapped to a pair of symbols in one cell are shifted in a neighbor cell.

主权项

1. A method of reducing inter-cell interference in space frequency block coding (SFBC) communication, the method comprising
performing SFBC encoding on n sets of n symbols, wherein the SFBC encoding includes mapping the n sets of n symbols across a set of n subcarriers and across a set of n antennas according to a first frequency assignment pattern in a serving cell, wherein n is an integer greater than 1, and wherein a set of n symbols, selected from the n sets of n symbols, includes a version of each symbol of the set of n symbols, and wherein a version of a symbol includes a redundant version of the symbol, a conjugate version of the symbol, an inverted version of the symbol, and an inverted conjugate version of the symbol; transmitting the n sets of n symbols using the first frequency assignment pattern over the set of n antennas; wherein the first frequency assignment pattern maps symbols to the set of n subcarriers and the set of n antennas, wherein each set of the n sets of n symbols is orthogonal to each of the other sets of n symbols, and wherein a subset of the n sets of n symbols is mapped to the same subcarriers as the subset of the n sets of n symbols in a neighbor cell and the remaining sets of n symbols are mapped to a cyclically shifted version of the remaining subcarriers as the remaining sets of n symbols are mapped to the remaining subcarriers in the neighbor cell.