Evaluation of compressed sensing in UWB systems with nbi

Abstract

A method of mitigating narrow band interference (NBI) in ultra wide band (UWB) systems operating around 10 GHz mitigates multiuser interference from IEEE 802.22 and WiMAX, wherein the multiuser interference interferes with both trained and blind UWB systems, with the trained UWB system using pilot symbol assisted modulation. The method passes a received UWB signal through a band pass filter (BPF), wherein the BPF is located at a UWB receiver and the UWB signal is a Hanning modulated pulse centered at 4 GHz frequency. The method further measures a plurality of test functions, determines a number of active users, notch filters NBI signals, based on the determined number of active users, passes the notch filtered signal through a quadratic programming algorithm, to perform joint decoding, estimates an arrival of a UWB payload, and demodulates the UWB payload, based on the estimated arrival of the UWB payload.

Description

BACKGROUND[0001]1. Field of the Invention[0002]The present disclosure relates to a method of compressed sensing in ultra wide band systems with narrow band interference.[0003]2. Description of Related Art[0004]The “background” description provided herein is for the purpose of generally presenting the context of the disclosure. Work of the presently named inventors, to the extent it is described in this background section, as well as aspects of the description which may not otherwise qualify as prior art at the time of filing, are neither expressly or impliedly admitted as prior art against the present invention.[0005]Ultra Wide-Band (UWB) technology is a promising a cutting edge technology in delivering high data rate for short range wireless communication systems. It is suitable for applications which need low power such as multi-hop wireless networks. Recently, UWB technology became a good candidate for short-range indoor high-resolution positioning systems. UWB signals have the a...

AI Technical Summary

Benefits of technology

The patent text describes a method for reducing interference in ultra wide band (UWB) systems. The method can identify and locate the sources of interference, and then use filters to remove them. This reduces interference and improves the overall performance of UWB systems. The described method can also be used in joint decoding and estimating the arrival of UWB payloads, among other applications. The technical effects of this patent are improved performance and reduced interference in UWB systems.

Problems solved by technology

Because of their large bandwidth, two problems arise, namely the high speed analog-to-digital-conversion (ADC) required at the receiver side and the coexistence with other narrowband systems that share the same part of the spectrum.

Because of their large bandwidth, UWB signals may encounter some problems especially with high sampling rate required at the receiver side.

Reducing the complexity of UWB receiver is an important issue.

Because of the power constraint of UWB signals, the mitigation of the NBI over UWB system is a challenging task.

When the narrowband signals are very strong, they will interfere with UWB signal and may degrade the system performance.

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