Title :
Constrained capacity of linear precoded ARQ in MIMO wireless systems
Author :
Sun, Haitong ; Samra, Harvind ; Ding, Zhi ; Manton, Jonathan
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA
Abstract :
The paper investigates the constrained capacity of sequential ARQ linear precoding in flat fading MIMO systems. To utilize fully the time diversity provided by ARQ, we derive the optimal linear ARQ precoders in a flat fading MIMO channel with the objective of maximizing the mutual information delivered by multiple transmissions of the same packet. The capacity-maximizing ARQ precoders combine water-pouring power loading and the optimal pairing of singular vectors in the current retransmission with those from previous transmissions. This optimal pairing is a special feature unique to sequential ARQ precoding and plays important role in maximizing the mutual information.
Keywords :
MIMO systems; automatic repeat request; channel capacity; fading channels; linear codes; optimisation; packet radio networks; MIMO wireless systems; capacity maximization; constrained capacity; flat fading channel; linearly precoded ARQ; mutual information maximization; packet multiple transmissions; sequential ARQ linear precoding; sequential ARQ precoding; time diversity; water-pouring power loading; Automatic repeat request; Channel capacity; Channel state information; Fading; Gaussian noise; MIMO; Mutual information; Receiving antennas; Transmitters; Vectors;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on
Print_ISBN :
0-7803-8874-7
DOI :
10.1109/ICASSP.2005.1415737
