Correlation Reduction Precoding for Joint Decoding in Overloaded MIMO-OFDM System on Rician Channel

Yabe, Tatsuro; Sanada, Yukitoshi

doi:10.1007/s11277-017-4202-7

Cited by 1 publication

(2 citation statements)

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“…However, it shows the error floor. Since the amplitude of the coded symbols are the same among all the streams, the candidate signal constellation points overlap with a certain probability [16]. With the precoding for amplitude variation, the BER performance reduces to 10 −4 at E b /N 0 of 15dB.…”

Section: ) Design Of Precoding For Amplitude Variationmentioning

confidence: 99%

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Open-Loop Correlation Reduction Precoding in Overloaded MIMO-OFDM Systems

Matsuoka

Doi

Yabe

et al. 2015

2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall)

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This paper proposes an open-loop correlation reduction precoding scheme for overloaded multiple-input multipleoutput (MIMO) orthogonal frequency division multiplexing (OFDM) systems. In overloaded MIMO-OFDM systems, frequency diversity through joint maximum likelihood (ML) decoding suppresses performance degradation owing to spatial signal multiplexing. However, on a line-of-sight (LOS) channel, a channel matrix may have a large correlation between coded symbols transmitted on separate subcarriers. The correlation reduces the frequency diversity gain and deteriorates the signal separation capability. Thus, in the proposed scheme, open-loop precoding in order to reduce the correlation between codewords transmitted on different signal streams is employed at the transmitter of an overloaded MIMO system. The proposed precoding scheme changes the amplitude as well as the phase of the coded symbols transmitted on different subcarriers. Numerical results obtained through computer simulation show that the proposed scheme improves the bit error rate performance on Rician channels.

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Section: ) Design Of Precoding For Amplitude Variationmentioning

confidence: 99%

“…Hence, this scheme is not applicable to overloaded MIMO systems. In [16], a precoding scheme for joint decoding in the overloaded MIMO system has been investigated. This scheme needs to detect the random precoding coefficients with preamble sequences.…”

Section: Introductionmentioning

confidence: 99%