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A space–time code (STC) is a method employed to improve the reliability of data transmission in wireless communication systems using multiple transmit antennas. STCs rely on transmitting multiple, redundant copies of a data stream to the receiver in the hope that at least some of them may survive the physical path between transmission and ...
Space–time trellis codes (STTCs) are a type of space–time code used in multiple-antenna wireless communications. This scheme transmits multiple, redundant copies of a generalised TCM signal distributed over time and a number of antennas ('space'). These multiple, 'diverse' copies of the data are used by the receiver to attempt to ...
Their original scheme was based on trellis codes but the simpler block codes were utilised by Siavash Alamouti, [6] and later Vahid Tarokh, Hamid Jafarkhani and Robert Calderbank [7] to develop space–time block-codes (STBCs). STC involves the transmission of multiple redundant copies of data to compensate for fading and thermal noise in the ...
STTD utilizes space–time block code (STBC) in order to exploit redundancy in multiple transmitted versions of a signal. STTD is one of numerous open loop transmit diversity schemes which also include Phase Switched Transmit Diversity (PSTD), Time Switched Diversity (TSTD), Orthogonal Transmit Diversity (OTD) and Space Time Spreading (STS) [1].
An example of this was that SFS2 could take the data stored in positions 1-5 and swap them with data stored in positions 6–10. Each store held 10 decimal digits, represented in 2 out of 5 code. The RFS held data from each of the MCUs associated registers, e.g. dialled digits. There were 20 MFS, 4 SFS and up to 36 RFS.
Non-coherent space time codes are a way of transmitting data in wireless communications.In this multiple antenna scheme, it is assumed that the receiver only has knowledge of the statistics of channel.
Development of the model continued in a Joint context and in November 2003 the C2 Information Exchange Data Model (C2IEDM) Edition 6.1 was released. Additional development to this model, incorporating the NATO Corporate Reference model, resulted in the model changing its name again to JC3IEDM with JC3IEDM Ed 0.5 being issued in December 2004.
Data exchange is the process of taking data structured under a source schema and transforming it into a target schema, so that the target data is an accurate representation of the source data. Data exchange allows data to be shared between different computer programs. It is similar to the related concept of data integration except that data is ...