作者：
Kim, Y. H.Chosun Univ
Dept Elect Engn 309 Pilmum Daero Gwangju 61452 South Korea
An efficient design algorithm for local quantisers at nodes that optimises the global metric (i.e. estimation error) for distributed estimation systems is proposed. Noting that the quantisation partitions constructed ...
详细信息
An efficient design algorithm for local quantisers at nodes that optimises the global metric (i.e. estimation error) for distributed estimation systems is proposed. Noting that the quantisation partitions constructed to minimise the estimation error are not independently encodable at each node, a novel technique of compressing the partitions into sets of codewords while ensuring a perfect independent encoding is presented, leading to the sets with reasonable cardinality, which enables transmission of multiple codewords at nodes for estimation. Experiments demonstrate a significantly improved performance over various quantiser designs while achieving about 26% reduction in the size of codeword sets compared with a recent design.
This work investigates the progressive linear precoder design for packet retransmissions in multi-input multi-output (MIMO) systems with multiple codewords and automatic repeat request (ARQ) bundling feedback. Assumin...
详细信息
This work investigates the progressive linear precoder design for packet retransmissions in multi-input multi-output (MIMO) systems with multiple codewords and automatic repeat request (ARQ) bundling feedback. Assuming perfect channel state information, a novel progressive linear ARQ precoder is proposed in the perspective of minimizing the packet error rate. We devise the ARQ precoder by combining power loading and subchannel pairing between current retransmission and previous transmissions. Furthermore, we extend the design to the case that the channel estimation error exists. Numerical results show that the proposed scheme can improve the performance of MIMO ARQ systems significantly regardless of the channel estimation error.
In this paper, we propose a transmit antenna selection scheme for hybrid automatic retransmission request (HARQ) in multi-input multi-output (MIMO) OFDM systems with the multiple codeword (MCW) transmission and the su...
详细信息
ISBN:
(纸本)9781424411092
In this paper, we propose a transmit antenna selection scheme for hybrid automatic retransmission request (HARQ) in multi-input multi-output (MIMO) OFDM systems with the multiple codeword (MCW) transmission and the successive decoding and cancellation (SDC) receiver. When a mobile station fails to decode a packet, the mobile station sends a NACK signal for the packet to the base station. We propose a method to select the transmit antenna for retransmission in case that there is no additional feedback except the NACK signal. Analytical and numerical results show that the proposed scheme has a better SINR performance and a lower number of retransmission than the conventional scheme.
暂无评论