Apparatus and method of transmitting/receiving signals using signaling point rotation at mutual cooperation transmission

An apparatus for receiving a signal by using signaling point rotation in mutually cooperating relaying, the apparatus comprising:

• a separation unit separating a symbol—obtained by combining the I-channel component of a user allocated a current time slot and the Q-channel component of another user rotated by a predetermined angle —received from the user allocated the current time slot, to the I-channel component and the Q-channel component in each time slot allocated to each user performing mutually co-operative relaying;
• a recombining unit recombining the Q-channel component of the current time slot and the I-channel component of the previous time slot, thereby generating a symbol related to each user;
• and
• a reverse rotation unit reversely rotating the recombined symbol by a pre-determined angle, thereby generating a complete symbol related to each user.

A method of transmitting a signal by using signaling point rotation in mutually cooperating relaying, the method comprising:

• (a) rotating a symbol containing data of a first user, by a predetermined angle, and then, obtaining the I-channel (in-phase) component of the rotated symbol;
• (b) receiving a symbol rotated by a predetermined angle, of a previous time slot from a node of a second user performing mutually cooperative relaying with the node of the first user, detecting the I-channel component, and obtaining the Q-channel (quadrature-phase) component of a symbol containing data of the second user from the detected I-channel component;
• and
• (c) combining the I-channel component of the first user generated in (a) and the Q-channel component of the second user generated in (b), thereby generating one symbol.

A method of receiving a signal by using signaling point rotation in mutually co-operating relaying, the method comprising:

• (a) separating a symbol—obtained by combining the I-channel component of a user allocated a current time slot and the Q-channel component of another user rotated by a predetermined angle—received from the user allocated the current time slot, to the I-channel component and the Q-channel component in each time slot allocated to each user performing mutually cooperative relaying;
• (b) recombining the Q-channel component of the current time slot and the I-channel component of the previous time slot, thereby generating a symbol related to each user;
• and
• (c) reversely rotating the recombined symbol by a predetermined angle, thereby generating a complete symbol related to each user.