TY - GEN

T1 - On achievable sum rate for vector Gaussian interference channels

AU - Shang, Xiaohu

AU - Chen, Biao

AU - Gans, Michael J.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - We develop a procedure to compute a lower bound of the sum capacity for the vector Gaussian interference channel (IFC). The obtained lower bound is shown to be tight for the very strong interference case and the procedure can be used to construct an inner bound for the vector Gaussian IFC. Alternatively, orthogonal transmission via frequency division multiplexing is considered and we establish the concavity of the sum rate as a function of the bandwidth allocation factor for the vector channel case. Numerical examples indicate that the achievable sum rate via the superposition code compares favorably with orthogonal transmission. This improvement holds for all interference power levels, a sharp contrast to that of the scalar counterpart.

AB - We develop a procedure to compute a lower bound of the sum capacity for the vector Gaussian interference channel (IFC). The obtained lower bound is shown to be tight for the very strong interference case and the procedure can be used to construct an inner bound for the vector Gaussian IFC. Alternatively, orthogonal transmission via frequency division multiplexing is considered and we establish the concavity of the sum rate as a function of the bandwidth allocation factor for the vector channel case. Numerical examples indicate that the achievable sum rate via the superposition code compares favorably with orthogonal transmission. This improvement holds for all interference power levels, a sharp contrast to that of the scalar counterpart.

KW - Achievable rate region

KW - Sum capacity

KW - Vector gaussian interference channels

UR - http://www.scopus.com/inward/record.url?scp=39049145195&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=39049145195&partnerID=8YFLogxK

U2 - 10.1109/ISIT.2006.261944

DO - 10.1109/ISIT.2006.261944

M3 - Conference contribution

AN - SCOPUS:39049145195

SN - 1424405041

SN - 9781424405046

T3 - IEEE International Symposium on Information Theory - Proceedings

SP - 2215

EP - 2219

BT - Proceedings - 2006 IEEE International Symposium on Information Theory, ISIT 2006

T2 - 2006 IEEE International Symposium on Information Theory, ISIT 2006

Y2 - 9 July 2006 through 14 July 2006

ER -