Square Complex Orthogonal Designs with Low PAPR and Signaling Complexity

Abstract--Space-Time Block Codes from square complex orthogonal designs (SCOD) have been extensively studied and most of the existing SCODs contain large number of zero. The zeros in the designs result in high peak-to-average power ratio (PAPR) and also impose a severe constraint on hardware implementation of the code when turning off some of the transmitting antennas whenever a zero is transmitted. Recently, rate 1 2 SCODs with no zero entry have been reported for 8 transmit antennas. In this paper, SCODs with no zero entry for 2a transmit antennas whenever a + 1 is a power of 2, are constructed which includes the 8 transmit antennas case as a special case. More generally, for arbitrary values of a, explicit construction of 2a

• Type: Journal
• Year: 2008
• Where: CORR
• Authors: Smarajit Das, B. Sundar Rajan
• Keywords: Complex Orthogonal Designs, CORR 2008, Education, Peak-to-average Power Ratio, Transmit Antennas