Analysis of Detection Methods for Space Frequency Block Code MIMO-OFDM System in Fast Fading Channels
Multiple antennae with the multicarrier trans-receiver system have increased diversity gain and higher data rates. For high performance 4G wireless communication, the multiple inputs and multiple outputs with orthogonal frequency division multiplexing (MIMO-OFDM) employing Space Frequency Block Codes which provides frequency and spatial diversity in fast fading environments to provide reliability of transmission. Space Frequency Block Code technique encodes data by using frequency diversity on multiple antennae. The challenge of these space-frequency diversity transmitted signal is a detection of original symbols at receiver in a fast fading environment. In this paper, it has been analyzed four detection methods, Simple maximum-likelihood, Joint maximum-likelihood, Zero-forcing and Decision-feedback. The evaluation of the detection methods is done on the basis of the Signal to Noise Ratio, Bit Error Rate and complexity of implementation in fast fading channels under three vehicular speeds i.e. 3km/hr, 60km/hr, and 120km/hr.
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