This paper reports on the design of multidimensional wireless power distribution using cellular concept, Helmholtz coils and cubical node design with power transmission capability over a distance of 6 m. To provide strong and uniform power delivery along the power transfer link axis, pairs of Helmholtz coils which are capable of creating uniform magnetic fields are used. To distribute wireless ...

The IEEE 802.11 wireless local area network (WLAN) standard supports multiple transmission modes. However, the higher mandatory data rate mode does not necessarily yield higher throughput. This research started from the relationship between the link throughput and the channel’s carrier-to-noise (C/N) ratio. Two algorithms are proposed, a throughput optimization and transmitter power saving (TOT...

The USB-IF designed the Receiver Jitter Tolerance Test to test the quality of the USB 3.0 receiver of a system. This test uses a waveform generator/oscilloscope combination, or a data generator/analyzer to send data to the Super Speed receiver which is then looped back through the transmitter back to the instrument. The data received is compared to the data generated and the errors are counted....

The application note summarizes the RF transmitter architectures of zero-IF, complex IF, high (real) IF, and direct RF before detailing the benefits of the direct RF transmitter for wireless applications, which have increased with the rise in smartphone and tablet computer use. As the application note shows, the superiority of a direct RF architecture with a high-performance DAC results in redu...

—A 0.1–5.0 GHz 65 nm CMOS recongurable transmitter for private network wireless communications is presented. The transmitter integrates a 0.1–1.5 GHz high-efciency dual-mode power amplier to support low-cost narrowband applications and a 0.45–5.0 GHz efciency-optimized pre-power amplier to support high-performance wideband applications. A wideband PLL frequency synthesizer, DACs with recon...

Wireless telemetry is crucial for long-term implantable neural recording systems. RF-encoded neurological signals often require high data-rates to transmit information from multiple electrodes with a sufficient sampling frequency and resolution. In this work, we quantify the effects of interferers and tissue attenuation on a wireless link for optimal design of future systems. The wireless link ...

Wireless Local Area Networks (WLANs) based on IEEE 802.11 standard have been rapidly growing. With limitations of the WLAN standard and rapid increase in wireless application demand, the air interface acts as bottleneck even in high-speed WLAN standards such as IEEE 802.11a and 802.11g with expected data transmission rates of up to 54 Mbps. To improve the overall performance of IEEE 802.11 WLAN...

An adaptive negative feedback controller structure in the transmitter is presented for indoor wireless communications, where the channel may vary due to rotation and small movement of the mobile terminal. The preliminary version of such negative feedback controller is popularly known as Tomlinson Harashima (TH) precoder in wireless communications. The proposed scheme presents a fast adaptive ve...

There is a well established need for the creation of highly miniaturized, long lasting and comfortable EEG systems. Power consumption, particularly of wireless transmission stages, is a major obstacle to the creation of these new EEG systems. This paper presents a 1.8 mW, 12 channel seizure detection algorithm for providing real-time power reduction of the wireless transmitter. An algorithm tha...

An overview of the developments in optical wireless systems viewed from the traditional communications viewpoint of transmitter, channel and receiver is presented. The trends in modulation formats that match information to the optical wireless channel are considered. This is followed by the discussion of recent transmitter and receiver innovations, particularly the utilisation of diversity tran...