Abstract :
In this paper, a novel detection method with self-interference reduction for double-ABBA (DABBA) quasi- orthogonal space-time code (QOSTC) is proposed, which utilizes low-dimension MMSE detection and symbols expectation (or symbols from MMSE detector) feedback in open-model. The symbols´ expectations, which are derived from bit-wise soft-information (BWSI) from channel decoder, are used in self-interference reduction for low-order modulation, such as QPSK. By utilizing the expectation derived from BWSI (or symbols from MMSE detector) and equivalent space-time channel effectively, its performance, such as PER and throughput, is better than conventional MMSE detection and it´s complexity is lower, because the matrix´s dimensions in MMSE detection are lower, so the scheme is more realizable in chip architecture. And the proposed detection scheme can also be used in other QOSTC.
Keywords :
fading channels; least mean squares methods; matrix algebra; modulation; orthogonal codes; space-time codes; MMSE detection; QPSK; bit-wise soft-information; channel decoder; chip architecture; detection method; double-ABBA; fading channel; low-order modulation; matrix dimensions; quasiorthogonal space-time code; self-interference reduction; space-time channel; symbols expectation; Block codes; Decoding; Detectors; Equations; Feedback; Quadrature phase shift keying; Receiving antennas; Space time codes; Throughput; Transmitting antennas;
