Abstract
This paper introduces an ultrawideband (UWB) channel sounding system. Its novel architecture allows real-time measurements of multiple time-variant radio propagation channels in different ultrawide frequency bands. Its architecture allows emulation of multiuser systems, sensor networks, localization systems, and distributed MIMO radar systems. The sounder uses a maximum length binary sequence (MLBS) excitation signal and correlation processing in the receiver. Its synchronous multichannel operation is supported by excellent timing stability and low power consumption of miniature size modules based upon custom integrated SiGe circuits. The paper describes the architecture, design, calibration, basic parameters, and application examples of the sounding system.
Highlights
UWB wireless systems are often discussed as a prospective technology for short range indoor communication and radar sensing applications [1,2,3]
We provide a compact description of a UWB channel sounder, which can operate in real-time
The paper provides a compact description of the real-time MIMO UWB channel sounder, its design, construction, 1.4
Summary
UWB wireless systems are often discussed as a prospective technology for short range indoor communication and radar sensing applications [1,2,3]. They mainly rely on application of short impulses or spread spectrum correlationtechniques Their application in the field of the real-time UWB channel sounding is often subjected to a number of constraints such as insufficient measurement rate, a bandwidth limited to just one frequency band, too complex electronics, high susceptibility to jitter, large drift, or others. The UWB sounding presented in [19, 20] was inspired by the UWB radar sensor architecture based on the spread spectrum correlation techniques and impulse compression of pseudonoise sequences (PNS) These sounding architectures offer only small bandwidth; they do not allow MIMO measurements or the measurement rate is too low for the real-time analysis of time variant channels. (iv) application example in distributed systems without any synchronization between the transmitter and the receiver, which demonstrates a new direction in the UWB channel sounding for emulation and evaluation of sensor networks
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