Power allocation in the high SNR regime for a multicast cell with regenerative network coding
IEEE Communications Letters
Impact of CSI on distributed space-time coding in wireless relay networks
IEEE Transactions on Wireless Communications
Ergodic channel capacities for the amplify-and-forward half-duplex cooperative systems
IEEE Transactions on Information Theory
Joint source/relay precoder design in nonregenerative cooperative systems using an MMSE criterion
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Analysis and optimization for multicast system with regenerative network coding
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Selection cooperation with transparent amplify-and-forward relaying in mimo relay channels
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Coding for the nonorthogonal amplify-and-forward cooperative channel
IEEE Transactions on Information Theory
Practical and general amplify-and-forward designs for cooperative networks
INFOCOM'10 Proceedings of the 29th conference on Information communications
Multiple-frame precoding and multi-D mapping for BICM-NAF
Wireless Communications & Mobile Computing
Joint cooperative analog network coding and OFDM system for wireless communication networks
International Journal of Wireless and Mobile Computing
| Hi-index | 35.80 |
In this paper, an exact asymptotic pairwise error probability (PEP) is derived for a half-duplex cooperative system employing an amplify-and-forward (AF) protocol. When compared with the PEP of a traditional multiple-input multiple-output (MIMO) system, the "diversity gain" for the cooperative system is no longer just a simple exponential function of the signal-to-noise ratio (SNR), rather, it involves the logarithm of the SNR. The term diversity gain function is used to designate this characteristic of the PEP. The coding gain, on the other hand, is found similar to that for the MIMO system and is proportional to the determinant of the autocorrelation of the error matrix. Based on our analysis and observations, we propose a design of unitary precoder for the cooperative system to achieve the full diversity gain function. For the case of a 4-QAM signal being transmitted, we further optimize the coding gain and arrive at a closed-form optimum precoder. Simulations indicate that our proposed precoder designs greatly improve the performance of the cooperative system