Multiuser detection technique has been applied for capacity enhancement in the presence of loading, voice activity, sectorization, inter & intra interference in multicell scenario of third 3G WCDMA system. In CDMA based system, each user transmits a data sequences spreaded by a code. This code is Unique to the mobile station (MS) and base station (BS) on both uplink and downlink. The present pa...

Terrestrial Digital Multimedia Broadcasting (TDMB) is one popular broadcasting standard that enable digital television transmissions to hand held receivers and cooperative system take advantage of the broadcast nature of wireless channels, uses relay stations as virtual antennas. Relay stations are an attractive solution to penetrate the wireless system with lower transmitting power at the Base...

In this paper, Bit Error Rate (BER) performance of Feedback-type Adaptive Array Antenna (AAA) in Frequency Division Duplex/Direct Sequence Code Division Multiple Access system (FDD/DS-CDMA) with Mobile Station (MS) reception diversity will be investigated. The results include the effects of maximum Doppler frequencies (fd) and antenna element spacing at Base Station (BS) under flat fading and f...

The system described in this paper is an asymmetric adaptation of orthogonal frequency division multiplexing (OFDM). In a conventional OFDM system, the signal processing hardware is divided equally between the base station and the terminal. In the asymmetric system, most of the complex signal processing hardware is shifted to the base station, making the terminal a simpler and more power-effici...

We address the problem of performing optimum spatiotemporal processing when using adaptive antenna arrays at base stations for multiuser downlink transmission, assuming the knowledge of the channel related to each user. This assumption typically holds in the context of time division duplex (TDD), time division multiple access (TDMA) based mobile communication systems. For frequency division dup...

A wireless massive MIMO system entails a large number (tens or hundreds) of base station antennas serving a much smaller number of users, with large gains in spectralefficiency and energy-efficiency compared with conventional MIMO technology. Until recently it was believed that in multicellular massive MIMO system, even in the asymptotic regime, as the number of service antennas tends to infini...

Most docking methods involving a small robot and a station require the docking station to communicate with the robot. Few robots are able to dock with a passive base station. Even fewer can also be “driven” by a bird. This paper presents a novel way for parrot-guided transportation and autonomous docking using range lights and a web camera.