Degrees of freedom of MIMO cellular networks: Two-cell three-user-per-cell case
Bibliographic record
Abstract
In this paper we investigate the spatially-normalized degrees of freedom (sDoF) of 2-cell, multiple-input multiple-output (MIMO) cellular networks with three users per cell having M antennas at each user and N antennas at each base-station. We characterize the optimal sDoF/user for all values of M and N and show that the optimal sDoF is a piecewise linear function, with either M or N being the bottleneck. We assume all channels to be generic, and establish achievability through linear transmit beamforming strategies. We introduce the notion of packing ratio that describes the interference footprint or shadow cast by a set of transmit beamformers. Through this notion, we reinterpret the alternating behavior of the optimal sDoF and attribute it to the availability of sets of transmit beamformers with certain packing ratios. We also derive a new DoF outer bound when 5 over 9 ≤ M over N ≤ 3 over 4.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".