Institut Superieur des Etudes Technologiques en Communications de Tunis, Ariana, Tunis
SYNCHROINFO JOURNAL. Volume 7, Number 4 (2021). P. 12-15.
The Layered Space-Time Processing approach to STC was first introduced by Lucent’s Bell Labs, with their BLAST family of STC structures. The information bits are demultiplexed into individual streams, which are then fed into individual encoders. These coders may be binary convolutional coders, or even no coding at all. The outputs of the coders are modulated and fed to the separate antennas, from which they are transmitted, using the same carrier-frequency/symbol waveform (TDMA) or Walsh code (CDMA). At the receiver, a spatial beamforming/nulling (zero-forcing) process is used at the front end in order to separate the individual coded streams, and feed them to their individual decoders. The outputs of the decoders are multiplexed back to reconstruct the estimate of the original information bitstream. Various receivers for communication system with Space-Time Coding in MIMO Channel are considered. Performance analysis was provided by statistical simulation for various parameters of communication system.
Keywords: Multiple-Input Multiple Output, BLAST, Space-Time Coding, Zero-Forcing, MMSE, V-BLAST detector.
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