We consider backlog-driven power control and antenna beamforming as ameans to maximize network throughput in a wireless uplink, where a base station receives with an antenna array from single-antenna wireless users. Throughput maximization gives rise to an optimization problem which is in general non-concave. We introduce a cross-layer, alternating maximization algorithm searching for the optim...

To further improve the potential of full-duplex communications, networks may employ multiple antennas at the base station or user equipment. To this end, networks that employ current radios usually deal with self-interference and multi-user interference by beamforming techniques. Although previous works investigated beamforming design to improve spectral efficiency, the fundamental question of ...

The combination of a digital beamforming technique with space-time block coding in an indoor wireless environment is the purpose of this paper. Uplink transmission is achieved by an omnidirectional mobile antenna, with signals arriving at the base station having relatively wide angular spread. The spatial channel response, an estimate of the channel angular gain pattern, is obtained by using an...

1 — The goal of this work is to depict the impact of cell partitioning in cell capacity of CDMA-based system. In this paper we examine the implementation of four partitions per cell as well as the influence of various height of the base station transceiver antenna to the system. We contemplated the urban area as the target, therefore the COST-231 Walfisch – Ikegami is applied as the propagation...

We present a near-field radio system for a millimeter-scale wireless smart sensor node that is implantable through a 14-gauge syringe needle. The proposed system integrates a radio system on chip and a magnetic antenna on a glass substrate within a total dimension of 1 × 1 × 10 mm3. We demonstrate energy-efficient active near-field wireless communication between the millimeter-scale sensor node...

In recent years, a large number of dual-band antennas have been developed for wireless applications [1]-[6]. Most of these dual-band antennas are used for mobile terminals, such as cellular phones or laptop computers. For such applications, the desirable radiation patterns are usually omnidirectional. A unidirectional radiation pattern is sometime required for wireless base station and/or acces...

Support of multimedia connectivity, packet access and bandwidth upon demand are essential features of future global communication networks. The core wireline network has evolved towards providing these broadband services. The increasing demand for mobile information access as well as the opportunity to deliver residential broadband service via wireless local loop necessitate the extension of th...

We consider the single-cell multi-user multiple-input multiple-output (MIMO) uplink with several single antenna transmitters/users and one base station with N antennas in the N → ∞ regime. The base station antennas are evenly distributed to n admissable locations throughout the cell. First, we show that a reliable (per-user) rate of O(log n) is achievable through optimal locational optimization...

Smart antennas basically attempt to enhance the desired signal power and suppress the interferers by beamforming toward the DOA (direction-of-arrival) of the desired signal and nullsteering in the case of the interferences’ DOAs in line-of-sight (LOS) situation. This paper considers a smart antenna system for cellular base station application. The signals at the base station are received throug...

As demand for wireless broadband grows, so does the importance of cellular base station (BTS) performance. The low noise amplifier (LNA) on the antenna tower is a key element in establishing BTS performance, affecting both the base station’s area of coverage and its tolerance of other nearby transmitters. Integrated LNAs with active bias regulators, such as Avago Technology’s MGA-63x family, pr...