With the introduction of massive MIMO systems, the codebook used for the MIMO precoding is getting larger and choosing the best precoding matrix is getting more complex. In this paper, we tackle the complexity problem that manifests itself when updating the codebook with the channel covariance matrix. We suggest a new method that reduces the number of complex matrix multiplications needed for codebook rotation. Simulation results show non-marginal performance gains in-terms of channel capacity, bit error rate. In addition our method shows larger increase in data rate in case of increasing the number of feedback bits while having a complexity reduction.
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KTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
Ecole Super Elect, SUPELEC, F-91192 Gif Sur Yvette, FranceKTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
Bjornson, Emil
Kountouris, Marios
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Ecole Super Elect, SUPELEC, F-91192 Gif Sur Yvette, FranceKTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
Kountouris, Marios
Bengtsson, Mats
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KTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, SwedenKTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
Bengtsson, Mats
Ottersten, Bjorn
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KTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
Univ Luxembourg, Interdisciplinary Ctr Secur Reliabil & Trust SnT, L-1359 Luxembourg, LuxembourgKTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
机构:
KTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
Ecole Super Elect, SUPELEC, F-91192 Gif Sur Yvette, FranceKTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
Bjornson, Emil
Kountouris, Marios
论文数: 0引用数: 0
h-index: 0
机构:
Ecole Super Elect, SUPELEC, F-91192 Gif Sur Yvette, FranceKTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
Kountouris, Marios
Bengtsson, Mats
论文数: 0引用数: 0
h-index: 0
机构:
KTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, SwedenKTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
Bengtsson, Mats
Ottersten, Bjorn
论文数: 0引用数: 0
h-index: 0
机构:
KTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden
Univ Luxembourg, Interdisciplinary Ctr Secur Reliabil & Trust SnT, L-1359 Luxembourg, LuxembourgKTH Royal Inst Technol, Signal Proc Lab, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden