Wireless sensor with digital detector

摘要

A wireless sensor with digital detector for monitoring the environment surrounding the sensor. The wireless sensor with digital detector comprises a configurable wireless transceiver with quadrature down and up converters, memory to store the real time received in phase and quadrature phase samples, a bank of phase rotators to phase rotate the received stored samples and a bank of in phase and quadrature phase constellation level slicers to detect the received bits. A control processor utilizes the received information, received signal strength and timing information to estimate and calculate various environmental parameters which can be used to activate different devices.

主权项

1. A wireless sensor comprising:
a transceiver comprising: a transmitter with configurable carrier frequency and modulation to transmit a digitally modulated predefined digital pattern signal using an analog up converter and a transmit antenna; a receiver to receive the reflected transmit signals from various objects in wireless sensor's surrounding environment comprising:
a receive antenna to receive the reflected transmit signals and a front end to down-convert and digitize the received carrier analog signal to digital in-phase “I” and quadrature “Q” samples; a computing device with memory to store received digitized real time “I” and “Q” samples for a configurable period of time and execute digital detection and signal strength measurement using the stored “I” and “Q” samples; a configurable digital detector comprising:
a bank of “N” digital phase rotators using the magnitude and angle of each pair of received “I” and “Q” samples to rotate the same pair of samples by “n.θ” and to create “N” distinct pair of phase rotated “I” and “Q” samples, where n is an integer and θ is a configurable phase increment; a bank of “N” digital level slicers to detect and store the “N” received data bits from “N” distinct stored pair of phase rotated “I” and “Q” samples; a bank of “N” digital correlators, each using the detected bits from one of “N” level slicers to detect the predefined transmit signal pattern, and to record pattern detection times; a processor that uses said predefined transmit signal pattern, and said pattern detection times to estimate and calculate certain environmental parameters in order to activate certain peripheral devices.