A Scalable VLSI Architecture for Soft-Input Soft-Output Single Tree-Search Sphere Decoding
Multiple-input multiple-output (MIMO) wireless transmission imposes huge challenges on the design of efficient hardware architectures for iterative receivers. A major challenge is soft-input soft-output (SISO) MIMO demapping, often approached by sphere decoding (SD). In this brief, we introduce-to o...
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| Veröffentlicht in: | IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2010-09, Vol.57 (9), p.706-710 |
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| container_title | IEEE transactions on circuits and systems. II, Express briefs |
| container_volume | 57 |
| creator | Witte, Ernst Martin Borlenghi, Filippo Ascheid, Gerd Leupers, Rainer Meyr, Heinrich |
| description | Multiple-input multiple-output (MIMO) wireless transmission imposes huge challenges on the design of efficient hardware architectures for iterative receivers. A major challenge is soft-input soft-output (SISO) MIMO demapping, often approached by sphere decoding (SD). In this brief, we introduce-to our best knowledge-the first VLSI architecture for SISO SD applying a single tree-search approach. Compared with a soft-output-only base architecture similar to the one proposed by Studer in IEEE J-SAC 2008, the architectural modifications for soft input still allow a one-node-per-cycle execution. For a 4×4 antennas system using quadrature amplitude modulation (QAM) with order 16, the area increases by 57%, and the operating frequency degrades by 34% only. |
| doi_str_mv | 10.1109/TCSII.2010.2056014 |
| format | Article |
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| identifier | ISSN: 1549-7747 |
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| subjects | Antennas Architecture Circuits Complexity theory Computer architecture Decoding Design engineering Hardware Integrated circuits Iterative decoding Iterative multiple-input multiple-output (MIMO) decoding Measurement MIMO Quadrature amplitude modulation Schnorr-Euchner (SE) enumeration soft-input soft-output (SISO) sphere decoding (SD) Very large scale integration VLSI architecture |
| title | A Scalable VLSI Architecture for Soft-Input Soft-Output Single Tree-Search Sphere Decoding |
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