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High-Bandwidth Spat...
High-Bandwidth Spatial Equalization for mmWave Massive MU-MIMO with Processing-in-Memory
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- Castañeda, Oscar (author)
- Cornell Tech
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- Jacobsson, Sven, 1990 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Telefonaktiebolaget L M Ericsson,Ericsson
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- Durisi, Giuseppe, 1977 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Goldstein, Tom (author)
- University of Maryland
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- Studer, Christoph (author)
- Cornell Tech
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(creator_code:org_t)
- 2020
- 2020
- English.
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In: IEEE Transactions on Circuits and Systems II: Express Briefs. - 1549-7747 .- 1558-3791. ; 67:5, s. 891-895
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Abstract
Subject headings
Close
- All-digital basestation (BS) architectures enable superior spectral efficiency compared to hybrid solutions in massive multi-user MIMO systems. However, supporting large bandwidths with all-digital architectures at mmWave frequencies is challenging as traditional baseband processing would result in excessively high power consumption and large silicon area. The recently-proposed concept of finite-alphabet equalization is able to address both of these issues by using equalization matrices that contain low-resolution entries to lower the power and complexity of high-throughput matrix-vector products in hardware. In this brief, we explore two different finite-alphabet equalization hardware implementations that tightly integrate the memory and processing elements: (i) a parallel array of multiply-accumulate (MAC) units and (ii) a bit-serial processing-in-memory (PIM) architecture. Our all-digital VLSI implementation results in 28nm CMOS show that the bit-serial PIM architecture reduces the area and power consumption up to a factor of 2× and 3×, respectively, when compared to a parallel MAC array that operates at the same throughput.
Subject headings
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datorteknik (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Inbäddad systemteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Embedded Systems (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- digital ASIC design
- quantization
- processing-in-memory (PIM)
- massive multi-user MIMO
- Millimeter wave (mmWave)
- spatial equalization
Publication and Content Type
- art (subject category)
- ref (subject category)
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