This paper presents the design and automatic system verification of digital baseband for Ultra High Frequency (UHF) radio frequency identification (RFID) tag, which is complied with a modified ISO 18000-6C protocol. Module-reuse approach and low power techniques are applied in the digital baseband to reduce the power consumption. And a novel verification strategy is discussed, which decreases t...

Piazza leonardo Da Vinci, 32 20133 Milano, ITALY fax: +39-2-2399-3413; e-mail: last [email protected] Abstract— Recently, a new method for achieving spectrum reuse in cellular systems, called Capture-Division Packetized Access (CDPA), has been introduced. The method uses a single frequency in all cells, and uses packet switching and packet retransmission as a means to overcome destructive coc...

Mobile stations in the cell boundary experience poor spectral efficiency due to the path loss and interference from adjacent cells. Therefore, satisfying QoS requirements of each MS at the cell boundary has been an important issue. To resolve this spectral efficiency problem at the cell boundary, deploying fixed relay stations has been actively considered. In this paper, we consider radio resou...

To enhance indoor coverage and capacity of fourth generation cellular networks femtocells are introduced. These are the small cellular base station installed in a home or buildings. Femtocells are deployed in the existing macrocell networks. Both uses same frequency band. Since both femtocell and macrocell uses same frequency band there is a problem of interference between the femtocell and mac...

Nowadays, Long Term Evolution (LTE) networks are becoming more and more popular. Femtocells have a strong potential for increasing the efficiency, cell coverage and network capacity of next-generation mobile networks. LTE femtocells represent a very promising answer to the ever growing bandwidth demand of mobile application. This system can be easily deployed without requiring a centralized pla...

A low-power wideband mixer is designed and implemented in 0.13 µm standard CMOS technology based on resistive feedback current-reuse (RFCR) configuration for the application of cognitive radio receiver. The proposed RFCR architecture incorporates an inductive peaking technique to compensate for gain roll-off at high frequency while enhancing the bandwidth. A complementary current-reuse techniqu...

The number and availability of vesicle release sites at the synaptic active zone (AZ) are critical factors governing neurotransmitter release; yet, these fundamental synaptic parameters have remained undetermined. Moreover, how neural activity regulates the spatiotemporal properties of the release sites within individual central synapses is unknown. Here, we combined a nanoscale imaging approac...

State University Blacksburg, VA 24061'-0111 This paper determines expressions which quantitatively describe the impact of path loss and user distribution on CDMA cellular radio system performance. Path ·ross in typical microcellular and cellular channels is shown to increase exponentially with distance to between the second and third power, as opposed to the commonly quoted fourth power law. Th...

During short-term synaptic depression, neurotransmission rapidly decreases in response to repetitive action potential firing. Here, by blocking the vacuolar ATPase, alkalinizing the extracellular pH, or exposing hippocampal slices to pH buffers, we impaired neurotransmitter refilling, and electrophysiologically tested the role of vesicle reuse in synaptic depression. Under all conditions, synap...

Cooperative relaying has shown as promissing approach to improve transmission reliability in cellular network. In this paper cooperative relaying and frequency reuse partitioning are exploited to avoid the co-channel cell interference (CCI) in the downlink multi-cell OFDMA systems. In our system layout, each cell is divided into three regions: the central region, the middle region and the edge ...