On Optimizing Transmit Power, Channel-Quantization Rate, and User Pairing for Power-Domain MIMO-NOMA Downlinks

23. May 2024
Gastvortrag von
Prof. Santipach
Kasetsart University, Bangkok

Prof. Santipach von der Kasetsart University, Bangkok, ist derzeit zu Gast am Institute of Telecommunications und wird den Vortrag halten.

Datum, Zeit:
23. Mai 2024, 15:00 bis 16:00 Uhr

Veranstaltungsort:
EI 5 Hochenegg HS

Veranstalter:
Institute of Telecommunications
Norbert Görtz
E-Mail: norbert.goertz@tuwien.ac.at

Titel: „On Optimizing Transmit Power, Channel-Quantization Rate, and User Pairing for Power-Domain MIMO-NOMA Downlinks“

Vortragender: Prof. Wiroonsak Santipach

Kurzfassung:
We consider power-domain multiple-input multiple-output (MIMO) nonorthogonal multiple access (NOMA) downlinks in which a multiple-antenna base station applies zeroforcing beamforming to transmit data to single-antenna users. Two users whose channel correlation coefficient exceeds a threshold are paired to share the same transmit beam. We derive an approximate of the expected signal-to-interference plus noise ratio (SINR) for each user, which depends on transmit power, the correlation threshold, and the number of quantization bits for channel direction information (CDI). A max-min SINR problem is formulated as a geometric program. We show that a near-optimal SINR can be achieved by optimizing only two CDI rates: one for unpaired users and the other for user pairs. A large SINR gain can be achieved by optimizing a pairing threshold when a total CDI rate is high.