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This paper presents a programmable wireless platform for biomedical signal acquisition application. The platform includes 8-channel programmable low-noise frontend circuits, a 12-bit SAR ADC, a digital control and processing unit (DCPU), and a RF transceiver. The number of the readout channels in the platform can be programmable according to the requirements of the applications. And the platform can...
In-band full-duplex sets challenging requirements for wireless communication radios, in particular their capability to prevent receiver sensitivity degradation due to self-interference (transmit signals leaking into its own receiver). Previously published self-interference rejection designs require bulky components and/or antenna structures. This paper addresses this form-factor issue. First, compact...
This paper investigates active cancellation techniques for a Full-Duplex transceiver. An auxiliary transmit chain is employed to create the cancellation signal, which is then injected at the receiver RF front-end by using a microstrip cou-pler. Two methods are proposed to calculate the self-interference cancellation signal. While the first method assumes the transmit chain to be strictly linear, the...
Urban environments are notorious for their high spectrum usage, particularly in their unlicensed radio bands. Wireless sensor network (WSN) nodes incorporate modern transceivers that can measure the background noise/interference and change channels. These combined capabilities suggest the need to better understand urban environments so that nodes can better avoid competing devices. In this paper,...
In the field of embedded wireless data communication system, such as remote measurement and control, wireless meter reading, information appliances, wireless mouse or keyboard, it usually needs to design a small custom protocol to directly access the hardware. To solve this problem, designed an embedded wireless data communication protocol, Using special data frame format to solve unreliable data...
In production testing of wireless systems, measurement of EVM (a critical spec that is directly related to bit error rate) incurs significant test time due to the large numbers of symbols that need to be transmitted for reasons of accuracy. In our approach, EVM is modeled as a function of the system static non-idealities (IQ mismatch, gain, IIP3 parameters) and dynamic non-idealities (system noise,...
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