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Title: | Full-diversity space-frequency trellis codes designing method |
Authors: | Woradit K. |
Keywords: | Energy-efficient communications Error rate performance MIMO-OFDM Space-frequency coding Space-frequency trellis code Space-time signal processing Spectral efficiencies Wireless communications Communication Energy efficiency Information technology MIMO systems Signal processing Trellis codes Wireless telecommunication systems Orthogonal frequency division multiplexing |
Issue Date: | 2013 |
Abstract: | This paper introduces a method to design space-frequency trellis codes for a system that combines space-time coding with orthogonal frequency division multiplexing (OFDM) to realize broad-band wireless communications. It has been pointed out in the literature that the frequency-selective fading, which usually occurs in such combined system, turns out to produce a beneficial effect on the error rate performance by providing the frequency diversity in addition to the spatial diversity. This enables space-frequency codes to exploit greater diversity than the space-time codes. However, exhaustive search for space-frequency trellis codes is impractical. The only existing heuristic design method has a drawback in the spectral efficiency, and in turn degrades the coding gain (energy efficiency,) which is also the primary purpose of space-frequency coding. We propose a practical method to design the space-frequency codes that exploit full diversity while maximizes the coding gain at a desired spectral efficiency. The simulation results show the superior error rate performance of the codes designed by the proposed method. © 2013 IEEE. |
URI: | https://ir.swu.ac.th/jspui/handle/123456789/13936 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84891090018&doi=10.1109%2fISCIT.2013.6645832&partnerID=40&md5=671bc4a90548ab4880288aac037e2c61 |
Appears in Collections: | Scopus 1983-2021 |
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