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- Nanjing UniversityCN133 papers
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9 papers · 2 filters
Semi-coherent Detection and Performance Analysis for Ambient Backscatter System
Jing Qian, Feifei Gao, Gongpu Wang +2
We study a novel communication mechanism, ambient backscatter, that utilizes radio frequency (RF) signals transmitted from an ambient source as both energy supply and information c…
Omnidirectional Space-Time Block Coding for Common Information Broadcasting in Massive MIMO Systems
Xin Meng, Xiang-Gen Xia, Xiqi Gao
In this paper, we design space-time block codes (STBCs) to broadcast the common information omnidirectionally in a massive MIMO downlink. To reduce the burden of the downlink chann…
Secure Massive MIMO Systems with Limited RF Chains
Jun Zhu, Wei Xu, Ning Wang
In future practical deployments of massive multi-input multi-output (MIMO) systems, the number of radio frequency (RF) chains at the base stations (BSs) may be much smaller than th…
Root Sparse Bayesian Learning for Off-Grid DOA Estimation
Jisheng Dai, Xu Bao, Weichao Xu +1
The performance of the existing sparse Bayesian learning (SBL) methods for off-gird DOA estimation is dependent on the trade off between the accuracy and the computational workload…
On Optimal Fronthaul Compression and Decoding Strategies for Uplink Cloud Radio Access Networks
Yuhan Zhou, Yinfei Xu, Wei Yu +1
This paper investigates the compress-and-forward scheme for an uplink cloud radio access network (C-RAN) model, where multi-antenna base-stations (BSs) are connected to a cloud-com…
On constacyclic codes over and their Gray images
Minjia Shi, Liqing Qian, Lin Sok +2
We first define a new Gray map from to , where and study -constacyclic codes over . Also of interest are some…