Tight closed-form approximation for the ergodic capacity of orthogonal STBC

• Published in: IEEE transactions on wireless communications Vol. 6; no. 2; pp. 452 - 457
• Main Authors: Perez, J., Ibanez, J., Vielva, L., Perez-Blanco, D.J., Santamaria, I.
• Format: Journal Article
• Language: English
• Published: Piscataway, NJ IEEE 01.02.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Approximation; AWGN; Block codes; Channels; Closed-form solution; Concatenated codes; Covariance matrix; Decoding; Ergodic processes; Exact sciences and technology; Exact solutions; Fading; Mathematical analysis; MIMO; Receiving antennas; Statistical analysis; Statistics; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Wireless communication; Fading channels; MIMO system; Block code; Space-time codes; Parameter estimation; Channel capacity; Power gain; space-time block codes (STBCs); Ergodicity; Covariance matrix; MIMO systems; Accuracy; Simulation; Channel estimation; Analytical method
• ISSN: 1536-1276; 1558-2248
• DOI: 10.1109/TWC.2007.05337

In this letter we derive a simple and tight closed-form approximation for the ergodic capacity of orthogonal space-time block coding in arbitrary fading channels. The expression is an analytical function of the power covariance matrix of the channel. In the case of uncorrelated channels the expression only depends on the variances of the channel power gains. These channel statistics can be easily obtained from both analytical and physical fading channel models. Simulations results show the accuracy of the proposed expression