Title :
On the DMT of bidirectional relaying with limited feedback
Author :
Kim, Tung T. ; Poor, H. Vincent
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., Princeton, NJ, USA
fDate :
June 28 2009-July 3 2009
Abstract :
Several half-duplex decode-and-forward two-way relaying protocols that efficiently exploit quantized channel state information (CSI) at the transmitters (CSIT) are investigated. Adapting the number of channel uses for each relaying phase and the transmit power based on limited CSIT is shown to result in a significant improvement in the diversity-multiplexing tradeoff (DMT). With CSI feedback from relay to sources, allocating the number of channel uses is sufficient to match the performance of power allocation. However, power control is instrumental to efficiently exploit CSI feedback from sources to relay.
Keywords :
diversity reception; multiplexing; protocols; radio transmitters; bidirectional relaying protocols; channel state information; decode-and-forward protocols; diversity-multiplexing tradeoff; limited feedback; power allocation; radio transmitters; Decoding; Fading; Feedback; OFDM modulation; Power control; Power system modeling; Power system relaying; Protocols; Relays; Transmitters;
Conference_Titel :
Information Theory, 2009. ISIT 2009. IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-4312-3
Electronic_ISBN :
978-1-4244-4313-0
DOI :
10.1109/ISIT.2009.5205609
