Patent ID: 8194772

Claim:
A constellation rotation relay system comprising: a matrix creator for creating a symbol matrix comprising a first symbol to be transmitted during a first time slot and a second symbol to be transmitted during a second time slot, such that the first symbol and the second symbol are arranged in parallel in the symbol matrix; and a constellation rotation unit for constellation rotating the symbols in the symbol matrix to convert the symbol matrix into a constellation rotated symbol matrix to prevent a ‘0’ value for a channel in a channel matrix to be created in association with input/output of a symbol in a subsequent destination, wherein the matrix creator creates a channel matrix by configuring a parallel link channel for transmitting the constellation rotated symbols to a destination of the relay network, and the constellation rotation unit constellation rotates a channel in the channel matrix into another value except for 0 by considering the constellation rotated symbol, and wherein the constellation rotation unit determines the constellation rotation matrix as any one of [ 1 0 0 1 ] , [ 1 ⅇ jπ / 4 1 - ⅇ jπ / 4 ] , ⁢ and 1 1 + ρ 2 ⁡ [ ρ 1 - 1 ρ ] , where ρ is a numerical value based on a bit energy to noise ratio or a bit error rate (BER).