TY - JOUR
T1 - An unfolded pipelined polar decoder with hybrid number representations for multi-user mimo systems
AU - Cao, Shan
AU - Zheng, Hu
AU - Lin, Ting
AU - Zhang, Shunqing
AU - Xu, Shugong
N1 - Publisher Copyright:
© 2004-2012 IEEE.
PY - 2020/11
Y1 - 2020/11
N2 - Next generation wireless communication introduces ultra high speed and low latency requirements to baseband processors, especially for multi-user multiple-input-multiple-output (MU-MIMO) systems. Polar codes, as the channel coding scheme in the control plane of 5G eMBB scenario, still cannot satisfy the hardware implementation requirements of polar decoders for MU-MIMO systems. In this brief, a high throughput and low latency polar decoder is proposed for MU-MIMO systems. The decoding architecture is fully unfolded to maximize hardware parallelism, and is fully pipelined by decoupling the round-Trip scheduling datapath to enable simultaneous processing of multiple codewords. Besides, a hybrid decoding datapath is introduced by proposing complementary decoding units with mixed data representations to reduce hardware complexity. For (1024, 512) polar codes, a decoding throughput of 100.6 Gbps is achieved, and the latency is 0.43 us when 36 users are processed simultaneously.
AB - Next generation wireless communication introduces ultra high speed and low latency requirements to baseband processors, especially for multi-user multiple-input-multiple-output (MU-MIMO) systems. Polar codes, as the channel coding scheme in the control plane of 5G eMBB scenario, still cannot satisfy the hardware implementation requirements of polar decoders for MU-MIMO systems. In this brief, a high throughput and low latency polar decoder is proposed for MU-MIMO systems. The decoding architecture is fully unfolded to maximize hardware parallelism, and is fully pipelined by decoupling the round-Trip scheduling datapath to enable simultaneous processing of multiple codewords. Besides, a hybrid decoding datapath is introduced by proposing complementary decoding units with mixed data representations to reduce hardware complexity. For (1024, 512) polar codes, a decoding throughput of 100.6 Gbps is achieved, and the latency is 0.43 us when 36 users are processed simultaneously.
KW - belief propagation (BP)
KW - decoder
KW - hardware implementation
KW - multi-user MIMO systems
KW - Polar code
UR - http://www.scopus.com/inward/record.url?scp=85094767178&partnerID=8YFLogxK
U2 - 10.1109/TCSII.2020.2964851
DO - 10.1109/TCSII.2020.2964851
M3 - Article
AN - SCOPUS:85094767178
SN - 1549-7747
VL - 67
SP - 2472
EP - 2476
JO - IEEE Transactions on Circuits and Systems II: Express Briefs
JF - IEEE Transactions on Circuits and Systems II: Express Briefs
IS - 11
M1 - 8952758
ER -