Proposal of Zero-Padded CAZAC sequence with discrete chirp signal

Turbo Demodulation of Zero-Padded OFDM Transmissions

Multiple scale correlation of chirp signal by discrete wavelet transform

Chirp Signal, a finite duration pulse with Linear Frequency Modulation (LFM) is the signal waveform widely used for coherent image formation. Coherent imagery is derived essentially as a 2-dimensional correlation of received, delayed chirp waveform with a 2dimensional matched filter. There is wide and active research interest in analyzing coherent imagery at multiple scales for multiresolution ...

Efficient Detection of Zero-padded Ofdm Signals with Large Blocks

In this paper, we present a frequency-domain receiver for ZP-OFDM schemes (Zero-Padded Orthogonal Frequency Division Multiplexing) where the duration of the channel impulse response is a significant fraction of the duration of the OFDM block. The proposed receiver has a relatively low complexity, allowing an FFT-based (Fast Fourier Transform) implementation. The proposed receiver is suitable to...

Frequency-domain equalizers with zero restoration for zero-padded block transmission with high SNR

This paper focuses on the equalization of block transmissions with zero pad (ZP). If the channel impulse response length does not exceed the ZP length, it is possible to construct zero-forcing equalizers (ZFEs). Improved performance may be achieved using a minimummean squared error (MMSE) equalizer. However, these equalizers are computationally intensive when a time-domain implementation is use...

Arbitrary Discrete Sequence Anomaly Detection with Zero Boundary LSTM

We propose a simple mathematical definition and new neural architecture for finding anomalies within discrete sequence datasets. Our model comprises of a modified LSTM autoencoder and an array of One-Class SVMs. The LSTM takes in elements from a sequence and creates context vectors that are used to predict the probability distribution of the following element. These context vectors are then use...