In this paper, an adaptive distributed space-time block code (ADSTBC) with linear decoding complexity is proposed. Within a group of candidate minimum-decoding-complexity quasi-orthogonal STBC (MDC-QO-STBC) codewords ...
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ISBN:
(纸本)9781424450756
In this paper, an adaptive distributed space-time block code (ADSTBC) with linear decoding complexity is proposed. Within a group of candidate minimum-decoding-complexity quasi-orthogonal STBC (MDC-QO-STBC) codewords obtained by changing the row order of a basic one, the codeword that has minimum absolute value of interference between real symbols (IRS) in its equivalent channel correlation matrix is optimal and adopted by ADSTBC. In addition, for the optimal codeword's IRS absolute value is small enough to be ignored, lineardecoding can achieve the performance of single complex symbol maximum-likelihood decoding, which is employed by MDC-QO-STBC, thus the decodingcomplexity is significantly reduced. The simulation results when the cooperative relays number is 4 and 3 both show the superiority of ASTBC over the normal DSTBC in the block error ratio performance and decodingcomplexity as well.
In this paper, a Decode and Forward (DF) cooperative communication scheme, achieving full rate, is introduced. The scheme uses Minimum-decodingcomplexity Quasi-Orthogonal Space-Time Block Code (MDC-QOSTBC), which use...
详细信息
ISBN:
(纸本)9781479958078
In this paper, a Decode and Forward (DF) cooperative communication scheme, achieving full rate, is introduced. The scheme uses Minimum-decodingcomplexity Quasi-Orthogonal Space-Time Block Code (MDC-QOSTBC), which uses a non-linear transmitter to obtain a linear decoding complexity at the receiver side. The transmitter has four transmitting antennas and the receiver uses more than four antennas to achieve a better performance. This technique acquires a differential full-diversity and linearcomplexity of the system in the first-hop. The channel used is a partiallycoherent relay channel (pCRC), where the first-hop is non-coherent and the second-hop is coherent. In the second hop, Generalized Selection Combining (GSC) technique is used to select and combine part of these relays. The relay nodes selection decision is based on instantaneous signal to noise ratio (ISNR).
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