In this letter, we implement a simplified version of the Cover - van der Meulen - Hajek - Pursley (CMHP) coding originally characterized by Wajcer, Wiesel, and Shamai. The vector Gaussian broadcast channel with imperfect channel state information at the transmitter (CSIT) is considered where the transmitter only knows the channel mean and variance. Our focus is on the implementation and performance analysis of CMHP under the imperfect CSIT model using practical codes. Turbo codes described in IEEE 802.20 draft specification and quadrature amplitude modulation are used to implement CMHP. In order to find the optimal power allocation and beamforming vectors which maximize the sum rate with practical codes, we introduce the SINR penalty factor. The SNRs that achieve various target spectral efficiency are presented and analyzed
Bibliographical noteFunding Information:
ACKNOWLEDGEMENT This work was partially supported by Defense Acquisition Program Administration and Agency for Defense Development under the contract and partially supported by the Ministry of Knowledge Economy, Korea, under the ITRC support program supervised by the IITA (IITA-2009-C1090-0902-0037).
- Broadcast channel
- Imperfect channel state information
- Superposition coding
ASJC Scopus subject areas
- Electrical and Electronic Engineering