Low Complexity and Power Efficient Space-Time-Frequency Coding for OFDMA
نویسندگان
چکیده
In this paper, a combination of Space-Time BlockCoding (STBC) and Discrete Fourier Transform (DFT) frequency coding for OFDMA systems is proposed which provides low computational complexity, low envelope fluctuations of the transmit signals at each transmit antenna and significant performance gains for transmission over mobile radio channels due to exploitation of spatial diversity. The resulting scheme is investigated for blockwise and interleaved subcarrier allocation. The signal properties and the computational complexity are discussed and it is shown that the scheme with interleaved subcarrier allocation outperforms the scheme with block allocation for transmission over spatially correlated and uncorrelated mobile radio channels.
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