Predistortion in GSM has been introduced to deal with saturation in amplification at Base Transceiver Stations (BTS). This paper will focus on the elements and architectures in signal predistortion for one carrier and multicarrier modulations. The GCMAC neural network has been introduced as predistorter to provide the design with adaptive, digital and practical features. Some results are includ...

Mobile service providers in recent years have been facing rapid increases in data traffic, so have much interest in small cell base stations such as picocells and femtocells. However, these small cell base stations are recognized as potential causes of inter-cell interference, since it is highly probable that they will be deployed using the same radio frequency as used by macrocells, due to the...

We address the problems at the most critical area in a cellular multicarrier code division multiple access (MC-CDMA) network, namely, the cell border. At a mobile terminal the diversity can be increased by using transmit diversity techniques such as cyclic delay diversity (CDD) and space-time coding like Alamouti. We transfer these transmit diversity techniques to a cellular environment. Theref...

We consider a cellular network model with base stations configurated according to the α-Ginibre point process with α ∈ (0, 1], which is one of the determinantal point processes. In this model, we focus on the asymptotic behavior of the so-called coverage probability (or link success probability) as the threshold value tends to 0 and ∞, and discuss the Padé approximation of the coverage probabil...

HYPRES Superconducting MicroElectronics (SME) Technology provides unparalleled performance improvements in the digital domain allowing, for the first time, the direct digital conversion of RF signals while enabling the use of advanced ultra-high speed digital signal processing techniques. SME makes it possible to take the receive (or transmit) signal directly at the output of the base station a...

We address the problem of fair assignment of base station locations in a cellular network. We use the generalized α-fairness criterion, which encompasses the different notions of fairness: that of global, proportional, harmonic or max-min fairness in our study. We derive explicit expression for α-fair BS locations under ’large population’ limits in the case of simple 1D models. We show analytic...

RF power amplifiers in mobile WiMAX transceivers operate in an inherently nonlinear manner. It is possible to amplify the signal in the linear region, and avoid distortion, using output power back-off; however, this approach may suffer significant reduction in efficiency and power output. This paper investigates the use of Doherty techniques instead of back-off, to simultaneously achieve good e...

NTT DOCOMO Technical Journal Vol. 12 No. 2 †1 Currently Strategic Marketing Department †2 Currently Corporate Strategy & Planning Department *1 Fixed-line backhaul link: Communication circuit for fixed-line interconnecting of equipment making up the mobile communications system such as switching stations and radio base stations. *2 Repeater: Physical layer relay equipment that amplifies downlin...