公开(公告)号：US20180027507A1

公开(公告)日：2018-01-25

申请号：US15652644

申请日：2017-07-18

Applicant: INSTITUT MINES-TELECOM / TELECOM BRETAGNE ,  Université Libanaise ,  Université Saint-Esprit de Kaslik

Inventor： Marie-Rita HOJEIJ ,  Joumana FARAH ,  Charbel ABDEL NOUR ,  Catherine DOUILLARD

IPC: H04W52/34 ,  H04W72/04

CPC classification number: H04W52/346 ,  H04W52/225 ,  H04W52/242 ,  H04W52/267 ,  H04W52/367 ,  H04W72/0446 ,  H04W72/0473

Abstract: Power allocation in NOMA systems for example on the basis Proportional Fairness calculations depends on knowledge of user throughput on a specified sub-band, which implies that users have already been allocated to particular sub-bands. Meanwhile, maximum throughput can generally be achieved where there is the greatest possible difference in transmission power for the users on a given sub-band, so that optimal allocation of users to sub-bands requires knowledge of the power available for each user. A mechanism is proposed based on iteratively applying a waterfilling algorithm to distribute power across a progressive subset of sub-bands to provisionally distribute the power budget across that subset of sub-bands, where at each iteration the water filling algorithm is carried out for each possible combination of users assignable to the newly considered sub-band using a floor for that sub band proportional to the reciprocal of the square of the highest channel gain value of any user in that combination, and calculating a throughput for that combination with the corresponding power attribution, whereby the combination retained for the next iteration (with an additional sub-band) is whichever gives the highest throughput. This process is thus repeated until users are assigned to all sub-bands, whereupon power allocations from the last iteration are definitive.

公开(公告)号：US20170310505A1

公开(公告)日：2017-10-26

申请号：US15492028

申请日：2017-04-20

Applicant: INSTITUT MINES-TELECOM / TELECOM BRETAGNE

Inventor： Jérémy NADAL ,  Charbel ABDEL NOUR ,  Amer BAGHDADI

IPC: H04L25/02 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04L25/0212 ,  H03H2017/0072 ,  H04L25/022 ,  H04L25/03159 ,  H04L25/03821 ,  H04L27/264 ,  H04L27/2698 ,  H04L2025/0342 ,  H04L2025/03522

Abstract: A method of designing a digital filter for example for use in an FBMC/OQAM telecommunications system, with a target overlapping factor and meeting a specified signal to interference ratio is described, whereby a candidate filter design defined by an impulse response, satisfying the Nyquist criterion and having an overlapping factor higher than the target is selected, and the time and frequency coefficients of its impulse response inverted to define a new filter design; andtruncating the impulse response defining said new filter design to the minimum number of coefficients achieving said specified signal to interference ratio.