In this paper, a new feedback scheme is proposed for downlink OFDMA system with frequency domain packet scheduling to achieve multiuser diversity. Recent work showed that the multiuser diversity can be gained by using the ...

In this paper, a new opportunistic feedback protocol for orthogonal frequency division multiple access (OFDMA) systems with mixed realtime (RT) and non-realtime (NRT) traffic is proposed and analysed. Based on the proposed ...

The paper deals with a modified version of opportunistic scheduling algorithm that exploits multiuser diversity. It incorporates the proportional fairness scheduling policy with the first-in-first-out (FIFO) policy to ...

Two new user speed estimation techniques for UMTS are proposed. They are based on a history of TPC sequences. Simulation results show that user speed estimation using a mapping equation can achieve more accurate speed ...

The achievable sum-rate capacity in multiuser systems grows as an increasing function of the number of users when opportunistic scheduling is employed. The scheduling requires the knowledge of channel state information ...

A modified version of the time delay compensation (TDC) technique for universal mobile telecommunication system (UMTS) power control called partial TDC or PTDC is proposed. The new technique relaxes the need for information ...

In this paper, a new adaptive power control algorithm for Universal Mobile Telecommunication System (UMTS) is proposed. The new algorithm conforms UMTS specifications and does not require any additional signalling. ...

An opportunistic feedback technique is proposed for proportional fair (PF) scheduling in a downlink multi-user system. This technique requires each mobile station, the scheduling metric of which is higher than a threshold, ...

Wideband Code Division Multiple Access (WCDMA) is the multiple access technique used in the third generation of mobile telecommunication (3G) systems. Capacity of this technique does not have an exact limit. The ...