Chiranjib Saha

Chiranjib Saha

3GPP Standards Engineer at Qualcomm | PhD in Wireless Communication

Integrated access and backhaul (IAB) in 5G

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Published:

In our latest paper, we have provided a comprehensive analysis of IAB (as well as orthogonal access and backhaul, OAB) in mm-wave 5G networks. Our results concretely demonstrate that the gains from densification of small cells in an IAB setting quickly saturate because of the bottleneck on the rate of wireless backhaul links. In addition, load balancing does not provide significant gains in this setting since the anchor macro cells will ultimately have to serve all the users in their coverage either through access links or via backhaul links to small cells regardless of how many of them were offloaded to small cells.

Our paper appears in IEEE JSAC special issue on mm-wave networking.

Link- IEEEXplore

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Learning on a Grassmann Manifold

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In our latest paper, we have shown that the classical problem of beamforming codebook design in limited feedback MIMO systems is equivalent to finding K centroids of the projections of the channel realizations on a Grassmann manifold, which can be solved using an unsupervised learning technique, such as K-means clustering.