Consecutive transmit power control ratio aided adaptive power control for UMTS
نویسندگان
چکیده
An adaptive power control algorithm is proposed to minimise power control errors at mobile speeds from 0 to 80 km=h in a UMTS system. The proposed algorithm adjusts its power control step size based on a new parameter called consecutive transmit power control ratio. Simulations of the proposed algorithm show that it outperforms fixed-step algorithms without any requirements for additional knowledge such as Doppler estimations.
منابع مشابه
An Adaptive Step Size Power Control with Transmit Power Control Command Aided Mobility Estimation
Power control is one of the most important mechanisms influencing on the maximum capacity and performance of Wideband Code Division Multiple Access (WCDMA) systems. Power control algorithms used in Universal Mobile Telecommunication System (UMTS) are based on fixed step size algorithms. The algorithms adjust their transmitted power based on Transmit Power Control (TPC) commands. In this paper, ...
متن کاملUAV Position Estimation Using Remote Radio Head With Adaptive Power Control
The adaptive power control of Code Division Multiple Access (CDMA) communications using Remote Radio Head (RRH) between multiple Unmanned Aerial Vehicles (UAVs) with a link-budget based Signal-to-Interference Ratio (SIR) estimate is applied to four inner loop power control algorithms. It is concluded that Base Station (BS) can calculate not only UAV distance using linearity between speed and Co...
متن کاملJoint Closed-Loop Power Control and Base Station Assignment for DS-CDMA Receiver in Multipath Fading Channel with Adaptive Beamforming Method
In this paper, we propose smart step closed-loop power control (SSPC) algorithm and base station assignment based on minimizing the transmitter power (BSAMTP) technique in a direct sequence-code division multiple access (DS-CDMA) receiver in the presence of frequency-selective Rayleigh fading. This receiver consists of three stages. In the first stage, with conjugate gradient (CG) adaptive ...
متن کاملA New Adaptive Power Control Algorithm for UMTS
The capacity of Wideband Code Division Multiple Access (WCDMA) technologies in Universal Mobile Telecommunication System (UMTS) relies on efficient power control algorithms. The typical UMTS power control algorithm is based on fixed step size. Therefore, it causes oscillations when the radio channel is unchanged. Furthermore, it lacks abilities to cope with rapid variations in fast fading chann...
متن کاملAdaptive Modulation and Adaptive Antenna Array Assisted Network Performance of Multi-User Detection Aided UTRA-like FDD/CDMA Systems
The adaptive antenna array and adaptive modulation aided network performance of a Frequency Division Duplex (FDD) Code Division Multiple Access (CDMA) based system is investigated using system parameters similar to those of the Universal Mobile Telecommunication System (UMTS). A number of performance metrics, such as the call dropping probability, the average throughput as well as the required ...
متن کامل