This paper discusses the collaborative beamforming problem using improved directional perturbation approach based on one bit feedback scheme. There are multiple transmitters and one receiver in our setup, all the transmitters send a common signal synchronously, the receiver return a one bit of feedback to the transmitters. Each transmitter uses only the one bit feedback and local information to...

We develop a custom Bit Error Rate test bench based on Altera’s Stratix II GX transceiver signal integrity development kit, demonstrate it on point-to-point serial optical link with data rate up to 5 Gbps, and compare it with commercial stand alone tester. The 8B/10B protocol is implemented and its effects studied. A variable optical attenuator is inserted in the fibre loop to induce transmissi...

Stochastic resonance (SR) enhances system responses by increasing noise. By applying SR to a receiver, a subthreshold signal not receivable by a conventional linear receiver could be received. Previously, we proposed an analysis method of the SR receiver using a comparator, and evaluated its bit error rate performance. The comparator is known as a simple non-dynamical system exhibiting SR. Howe...

An optoelectronic integrated circuit (OEIC) receiver is realized with standard 0.25-μm SiGe BiCMOS technology for 850-nm optical interconnect applications. The OEIC receiver consists of a Si avalanche photodetector, a transimpedance amplifier with a DC-balanced buffer, a tunable equalizer, and a limiting amplifier. The fabricated OEIC receiver successfully detects 12.5-Gb/s 2(31)-1 pseudorandom...

Reduction of the power consumption in portable wireless receivers is an important consideration for next-generation cellular systems specified by standards such as the UMTS, IMT2000. This paper explores the architectural design-space and methodologies for reducing the dynamic power dissipation in the Direct Sequence Code Division Multiple Access (DS-CDMA) downlink RAKE receiver. Starting with a...

A complete 1.9GHz receiver, with BAW resonatorreferenced input matching network, is designed as a wakeup receiver for wireless sensor networks. The 90nm CMOS chip includes RF amplifier, PGA, ADC, and reference generation, while consuming 65μW from a single 0.5V supply. The input RF bandwidth of the receiver is 7MHz, while the maximum data rate is 100kbps. When detecting a 31-bit sequence, the r...

We report a fully integrated serial-link receiver with optical interface fabricated with a 0.18 mm complementary metal oxide semiconductor technology for long-haul display interconnects. The receiver includes a trans-impedance amplifier, a limiting amplifier, a clock and data recovery circuit, 1:64 de-multiplexer and a built-in error checker. The receiver produces 64-bit wide electrical signals...

time reversal (tir) technique is an effective and simple method for data transmission in extremely multipath indoor uwb channels that mitigates the complexity of receiver by its own time focusing feature. although, tir method has the suitable performance, but it is sensitive to the non-ideal channel estimation error. in this paper at first, the bit error probability of tir-uwb communication sys...

The LTM®9003 is a 12-bit digital pre-distortion μModule® receiver subsystem for the transmit path of cellular basestations. Utilizing an integrated system in a package (SiP) technology, it includes a downconverting mixer, wideband fi lter and analog-to-digital converter (ADC). The system is tuned for an intermediate frequency (IF) of 184MHz and a signal bandwidth of up to 125MHz. The 12-bit ADC...

Bonding arrays of hundreds of photo-detectors and VCSELs to silicon substrates has been demonstrated [1-2] and scaling to thousands of devices is possible. To support these large numbers of optical IO, very small and low-power IO interface electronics is required. To remove both the speed and power trade-offs intrinsic in receiver that uses a transimpedance amplifier to convert the photo-curren...