Testbed Measurements of Optimized Linear Dispersion Codes
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چکیده
High-rate optimized linear dispersion (LD) codes have been investigated extensively in theory and by simulation throughout the last years. Regardless of the findings of the research so far, little work has been performed to investigate the performance of such codes in a realistic transmission system. We implemented an optimized full-rate full-diversity space-time block code, derived by Damen, on the Vienna MIMO testbed for a 2 × 2 MIMO channel, and measured the uncoded bit error rate (BER) performance of the space-time block code, if decoded with a sphere decoder. Moreover, we compare the obtained results with the uncoded BER of the well-known Alamouti STBC, decoded with a ZF receiver, at various SNR values. Our results show that in a realistic environment highrate optimized LD codes offer no advantage over the conventional Alamouti STBC.
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تاریخ انتشار 2007