Single-Symbol ML Decodable Distributed STBCs for Partially-Coherent Cooperative Networks

—Space-time block codes (STBCs) that are single-symbol decodable (SSD) in a co-located multiple antenna setting need not be SSD in a distributed cooperative communication setting. A relay network with N relays and a single source-destination pair is called a partially-coherent relay channel (PCRC) if the destination has perfect channel state information (CSI) of all the channels and the relays have only the phase information of the sourceto-relay channels. In this paper, first, a new set of necessary and sufficient conditions for a STBC to be SSD for co-located multiple antenna communication is obtained. Then, this is extended to a set of necessary and sufficient conditions for a distributed STBC (DSTBC) to be SSD for a PCRC, by identifying the additional conditions. Using this, several SSD DSTBCs for PCRC are identified among the known classes of STBCs. It is proved that even if a SSD STBC for a co-located MIMO channel does not satisfy the additional conditions for the code to b...

• Type: Conference
• Year: 2008
• Where: ICC
• Authors: Dheeraj Sreedhar, Ananthanarayanan Chockalingam, B. Sundar Rajan
• Keywords: Co-located Multiple Antenna, Communications, Cooperative Communications, ICC 2008, Sufficient Conditions