Majlesi Journal of Electrical Engineering On the Full-Rate Linear Complexity 2×2 Space-Time Block Code: Application in Keyhole Channels Volume 7 (2013) Issue 1, March 2013 2024 02 25 On the Full-Rate Linear Complexity 2×2 Space-Time Block Code: Application in Keyhole Channels EN S.Saleh Hosseini Bidaki Electrical Eng. Department, University of Kerman, Kerman, Iran Behrouz Bagheri Ranjbar Electrical Eng. Department, University of Kerman, Kerman, Iran Siamak Talebi Department of Electrical Engineering, Shahid Bahonar University of Kerman, Kerman Journal Article 2024 02 25  In this paper, a new full rate, full diversity 22 STBC with linear complexity in the receiver is introduced for keyhole channels, where the rank-deficiency of the channel matrix degrades system performance. This code is optimized based on the known criteria for these types of the channels. Simulation results demonstrate that the proposed code outperforms some of the well-recognized STBCs when BPSK and 4-QAM constellation are utilized.