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Low-complexity soft-output K-Best MIMO decoder in 2×2 spatial multiplexing system
Adiono T.a, Dwiyasa F.a
a Sekolah Teknik Elektro Dan Informatika, Institut Teknologi Bandung, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]This paper presents algorithm of low-complexity K-Best MIMO decoder algorithm applied in 2×2 spatial multiplexing system with 64-QAM modulation. Low computational complexity in the proposed algorithm is achieved by separating real and imaginary computation. We also discovered that some complex-value multiplications can be reduced into two real-value multiplications without affecting performance. These improvements increase the suitability of K-Best algorithm to be applied in real-time VLSI implementation. Finally, we verified the proposed K-Best algorithm performance and compared it with the performance of conventional algorithm in term of Bit Error Rate (BER) using IEEE 802.16-2009 WiMAX system as an implementation platform. The proposed algorithm can achieve computational reduction in Partial Euclidean Distance (PED) calculation as high as 57.78% for real-value adders and 74.93% for real-value multipliers compared with conventional K-Best. © 2012 IEEE.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Algorithm performance,Computational reduction,Conventional algorithms,Decoder algorithms,Euclidean distance,IEEE 802.16,Implementation platforms,K-Best,Low computational complexity,Low-complexity,MLD,Soft output,Spatial multiplexing systems,VLSI implementation,WiMAX systems[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]K-Best,MIMO decoder,MLD,WiMAX[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1109/TSSA.2012.6366058[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]